Citigroup Commercial Mortgage Trust 2017 B1

09/30/2025 | Press release | Distributed by Public on 09/30/2025 12:38

Asset-Backed Issuer Distribution Report (Form 10-D)


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
STATEMENT TO NOTEHOLDERS
September 17, 2025
TRANSACTION PARTIES
Depositor: Citigroup Commercial Mortgage Securities Inc.
Master Servicer: Wells Fargo Bank, National Association
Certificate Administrator: Citibank, N.A.
Special Servicer: LNR Partners, LLC
Trustee / Custodian: Deutsche Bank Trust Company Americas
Asset Representations Reviewer /
BellOak, LLC
Operating Advisor:
Danny Lee Citibank, Agency and Trust
(212) 816-4936 388 Greenwich Street Trading, 4th Floor
[email protected] New York, NY 10013
TABLE OF CONTENTS
1 . Distribution Summary 2
1.1 . Summary 2
1.2 . Factors 3
2 . Distribution Detail 4
2.1 . Interest Detail 4
2.2 . Interest Shortfall Detail 5
2.3 . Principal Detail 6
3 . Reconciliation Detail 7
4 . Other Information 8
5 . Stratification Detail 9
6 . Mortgage Loan Detail 14
7 . NOI Detail 16
8 . Delinquency Loan Detail 18
9 . Collateral Performance Delinquency and Loan Status Detail 19
10 . Appraisal Reduction Detail 20
11 . Historical Appraisal Reduction Detail 21
12 . Loan Modification Detail 24
13 . Historical Loan Modification Detail 25
14 . Specially Serviced Loan Detail 31
15 . Historical Specially Serviced Loan Detail 32
16 . Unscheduled Principal Detail 37
17 . Historical Unscheduled Principal Detail 38
18 . Liquidated Loan Detail 39
19 . Historical Liquidated Loan Detail 40
20 . CREFC Investor Reporting Package Legends 41
21 . Notes 42
Reports Available at sf.citidirect.com v. 21.09.28 Page 1 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
DISTRIBUTION SUMMARY
September 17, 2025
Accretion
&
Non-Cash
Accrual Other Balance
Original Prior Pass-Through Day Interest (As Interest) Principal Total Realized Loss Increase/ Current
Class Balance Balance Rate Count Distributed Distributed Distributed Distributed /(Recovery) (Decrease) Balance
A-1 21,308,000.00 - 2.008000 % 30/360 - - - - - - -
A-2 52,843,000.00 - 3.053000 % 30/360 - - - - - - -
A-3 245,000,000.00 233,140,098.46 3.197000 % 30/360 621,124.08 - - 621,124.08 - - 233,140,098.46
A-4 268,110,000.00 268,110,000.00 3.458000 % 30/360 772,603.65 - - 772,603.65 - - 268,110,000.00
A-AB 38,890,000.00 13,631,829.44 3.243000 % 30/360 36,840.02 - 592,949.08 629,789.10 - - 13,038,880.36
A-S 89,450,000.00 89,450,000.00 3.711000 % 30/360 276,624.12 - - 276,624.12 - - 89,450,000.00
B 38,016,000.00 38,016,000.00 3.963000 % 30/360 125,547.84 - - 125,547.84 - - 38,016,000.00
C 36,899,000.00 36,899,000.00 4.239385 % 30/360 130,357.56 - - 130,357.56 - - 36,899,000.00
D 41,370,000.00 41,370,000.00 3.000000 % 30/360 202,748.91 - - 202,748.91 - - 41,370,000.00
E 21,245,000.00 21,245,000.00 3.300000 % 30/360 21,345.23 - - 21,345.23 - - 21,245,000.00
F 8,945,000.00 8,945,000.00 3.300000 % 30/360 - - - - - - 8,945,000.00
G 8,945,000.00 8,945,000.00 3.300000 % 30/360 - - - - - - 8,945,000.00
H 23,481,024.00 20,987,913.95 3.300000 % 30/360 - - - - - - 20,987,913.95
R - - 0.000000 % 30/360 - - - - - - -
VRR 47,079,054.00 41,091,570.69 0.000000 % 30/360 142,818.17 - 31,207.85 174,026.02 - - 41,060,362.84
Total 941,581,078.00 821,831,412.54 2,330,009.58 - 624,156.93 2,954,166.51 - - 821,207,255.61
Notional
X-A 715,601,000.00 604,331,927.90 0.849476 % 30/360 427,804.65 - - 427,804.65 - (592,949.08 ) 603,738,978.82
X-B 38,016,000.00 38,016,000.00 0.276385 % 30/360 8,755.88 - - 8,755.88 - - 38,016,000.00
X-D 41,370,000.00 41,370,000.00 1.239385 % 30/360 42,727.80 - - 42,727.80 - - 41,370,000.00
X-E 21,245,000.00 21,245,000.00 0.939385 % 30/360 16,631.03 - - 16,631.03 - - 21,245,000.00
X-F 17,890,000.00 17,890,000.00 0.939385 % 30/360 14,004.66 - - 14,004.66 - - 17,890,000.00
X-H 23,481,024.00 20,987,913.95 0.939385 % 30/360 16,429.78 - - 16,429.78 - - 20,987,913.95
Total 857,603,024.00 743,840,841.85 526,353.80 - - 526,353.80 - (592,949.08 ) 743,247,892.77
Grand Total 1,799,184,102 1,565,672,254 2,856,363.38 - 624,156.93 3,480,520.31 - (592,949.08 ) 1,564,455,148
Reports Available at sf.citidirect.com v. 21.09.28 Page 2 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
DISTRIBUTION SUMMARY - FACTORS
September 17, 2025
Accretion
&
Non-Cash
Other Balance
Record Interest (As Interest) Principal Total Realized Loss Increase/ Current
Class CUSIP Date Distributed Distributed Distributed Distributed /(Recovery) (Decrease) Balance
A-1 17326 CAW4 08/29/2025 - - - - - - -
A-2 17326 CAX2 08/29/2025 - - - - - - -
A-3 17326 CAY0 08/29/2025 2.53520033 - - 2.53520033 - - 951.59223861
A-4 17326 CAZ7 08/29/2025 2.88166667 - - 2.88166667 - - 1,000.00000000
A-AB 17326 CBA1 08/29/2025 0.94728773 - 15.24682643 16.19411417 - - 335.27591566
A-S 17326 CBB9 08/29/2025 3.09249994 - - 3.09249994 - - 1,000.00000000
X-A 17326 CBE3 08/29/2025 0.59782567 - - 0.59782567 - - 843.68101612
X-B 17326 CBF0 08/29/2025 0.23032092 - - 0.23032092 - - 1,000.00000000
X-D 17326CAJ3 U1740GAE4 17326CAK0 08/29/2025 1.03282088 - - 1.03282088 - - 1,000.00000000
X-E 17326CAL8 U1740GAF1 17326CAM6 08/29/2025 0.78282090 - - 0.78282090 - - 1,000.00000000
X-F 17326CAN4 U1740GAG9 17326CAP9 08/29/2025 0.78282057 - - 0.78282057 - - 1,000.00000000
X-H 17326CBK9 U1740GAM6 17326CBL7 08/29/2025 0.69970458 - - 0.69970458 - - 893.82447503
B 17326 CBC7 08/29/2025 3.30250000 - - 3.30250000 - - 1,000.00000000
C 17326 CBD5 08/29/2025 3.53282094 - - 3.53282094 - - 1,000.00000000
D 17326CAA2 U1740GAA2 17326CAB0 08/29/2025 4.90086802 - - 4.90086802 - - 1,000.00000000
E 17326CAC8 U1740GAB0 17326CAD6 08/29/2025 1.00471782 - - 1.00471782 - - 1,000.00000000
F 17326CAE4 U1740GAC8 17326CAF1 08/29/2025 - - - - - - 1,000.00000000
G 17326CAG9 U1740GAD6 17326CAH7 08/29/2025 - - - - - - 1,000.00000000
H 17326CBG8 U1740GAL8 17326CBH6 08/29/2025 - - - - - - 893.82447503
R 17326 CAU8 08/29/2025 - - - - - - -
VRR 17326 CAT1 08/29/2025 3.03358198 - 0.66288184 3.69646382 - - 872.15777190
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
DISTRIBUTION INFORMATION - INTEREST DETAIL
September 17, 2025
Rate Interest Shortfall Paid
Cap
Accrual Net Accreted Non Carry Cap Carryover Carryover
Class Uncapped Capped Next Dates Accrued /Deferred Recovered Forward /Basis Risk Accrued Carry Forward /Basis Risk Total
A-1 2.00800 % 2.00800 % 2.00800 % 08/01-08/31 - - - - - - - - -
A-2 3.05300 % 3.05300 % 3.05300 % 08/01-08/31 - - - - - - - - -
A-3 3.19700 % 3.19700 % 3.19700 % 08/01-08/31 621,124.08 - - - - 621,124.08 - - 621,124.08
A-4 3.45800 % 3.45800 % 3.45800 % 08/01-08/31 772,603.65 - - - - 772,603.65 - - 772,603.65
A-AB 3.24300 % 3.24300 % 3.24300 % 08/01-08/31 36,840.02 - - - - 36,840.02 - - 36,840.02
A-S 3.71100 % 3.71100 % 3.71100 % 08/01-08/31 276,624.12 - - - - 276,624.12 - - 276,624.12
B 3.96300 % 3.96300 % 3.96300 % 08/01-08/31 125,547.84 - - - - 125,547.84 - - 125,547.84
C 4.31828 % 4.23939 % 4.23939 % 08/01-08/31 130,357.56 - - - - 130,357.56 - - 130,357.56
D 3.00000 % 3.00000 % 3.00000 % 08/01-08/31 103,425.00 - - 247.69 - 103,425.00 99,323.91 - 202,748.91
E 3.30000 % 3.30000 % 3.30000 % 08/01-08/31 58,423.75 - - 37,400.29 - 21,345.23 - - 21,345.23
F 3.30000 % 3.30000 % 3.30000 % 08/01-08/31 24,598.75 - - 24,734.23 - - - - -
G 3.30000 % 3.30000 % 3.30000 % 08/01-08/31 24,598.75 - - 24,734.23 - - - - -
H 3.30000 % 3.30000 % 3.30000 % 08/01-08/31 57,716.76 - - 63,205.54 - - - - -
R 0.00000 % 0.00000 % 0.00000 % 08/01-08/31 - - - - - - - - -
VRR 0.00000 % 0.00000 % 0.00000 % 08/01-08/31 142,818.17 - - - - 142,818.17 - - 142,818.17
Total 2,374,678.45 - - 150,321.98 - 2,230,685.67 99,323.91 - 2,330,009.58
Notional
X-A 1.00278 % 0.84948 % 0.84948 % 08/01-08/31 427,804.65 - - - - 427,804.65 - - 427,804.65
X-B 0.35528 % 0.27639 % 0.27639 % 08/01-08/31 8,755.88 - - - - 8,755.88 - - 8,755.88
X-D 1.31828 % 1.23939 % 1.23939 % 08/01-08/31 42,727.80 - - - - 42,727.80 - - 42,727.80
X-E 1.01828 % 0.93939 % 0.93939 % 08/01-08/31 16,631.03 - - - - 16,631.03 - - 16,631.03
X-F 1.01828 % 0.93939 % 0.93939 % 08/01-08/31 14,004.66 - - - - 14,004.66 - - 14,004.66
X-H 1.01828 % 0.93939 % 0.93939 % 08/01-08/31 16,429.78 - - - - 16,429.78 - - 16,429.78
Total 526,353.80 - - - - 526,353.80 - - 526,353.80
Grand Total 2,901,032.25 - - 150,321.98 - 2,757,039.47 99,323.91 - 2,856,363.38
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
DISTRIBUTION INFORMATION - INTEREST SHORTFALL DETAIL
September 17, 2025
Cap Carryover /
Non-Recov Shortfall Carry Forward Interest Basis Risk Shortfall
Other
Class PPIS SSRA Shortfall Prior Int. on Prior New Paid Outstanding Prior Int. on Prior New Paid Outstanding
A-1 - - - - - - - - - - - - -
A-2 - - - - - - - - - - - - -
A-3 - - - - - - - - - - - - -
A-4 - - - - - - - - - - - - -
A-AB - - - - - - - - - - - - -
A-S - - - - - - - - - - - - -
B - - - - - - - - - - - - -
C - - - - - - - - - - - - -
D - - - 99,076.22 247.69 - 99,323.91 - - - - - -
E - - - 117,008.17 321.77 37,078.52 - 154,408.46 - - - - -
F - - - 49,265.15 135.48 24,598.75 - 73,999.38 - - - - -
G - - - 49,265.15 135.48 24,598.75 - 73,999.38 - - - - -
H - - - 1,995,920.42 5,488.78 57,716.76 - 2,059,125.96 - - - - -
R - - - - - - - - - - - - -
VRR - - - - - - - - - - - - -
Total - - - 2,310,535.11 6,329.20 143,992.78 99,323.91 2,361,533.18 - - - - -
Notional
X-A - - - - - - - - - - - - -
X-B - - - - - - - - - - - - -
X-D - - - - - - - - - - - - -
X-E - - - - - - - - - - - - -
X-F - - - - - - - - - - - - -
X-H - - - - - - - - - - - - -
Total - - - - - - - - - - - - -
Grand Total - - - 2,310,535.11 6,329.20 143,992.78 99,323.91 2,361,533.18 - - - - -
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
DISTRIBUTION INFORMATION - PRINCIPAL DETAIL
September 17, 2025
Accretion
&
Non-Cash
Balance Cumulative
Prior Principal Accreted Realized Loss Increase/ Current Realized Class % Class % Sub % Sub %
Class Balance Distributed Principal /(Recovery) (Decrease) Balance Loss Original Current Original Current
A-1 - - - - - - - 2.26 % 0.00 % 30.00 % 34.08 %
A-2 - - - - - - - 5.61 % 0.00 % 30.00 % 34.08 %
A-3 233,140,098.46 - - - - 233,140,098.46 - 26.02 % 28.39 % 30.00 % 34.08 %
A-4 268,110,000.00 - - - - 268,110,000.00 - 28.47 % 32.65 % 30.00 % 34.08 %
A-AB 13,631,829.44 592,949.08 - - - 13,038,880.36 - 4.13 % 1.59 % 30.00 % 34.08 %
A-S 89,450,000.00 - - - - 89,450,000.00 - 9.50 % 10.89 % 20.00 % 22.61 %
B 38,016,000.00 - - - - 38,016,000.00 - 4.04 % 4.63 % 15.75 % 17.74 %
C 36,899,000.00 - - - - 36,899,000.00 - 3.92 % 4.49 % 11.63 % 13.01 %
D 41,370,000.00 - - - - 41,370,000.00 - 4.39 % 5.04 % 7.00 % 7.71 %
E 21,245,000.00 - - - - 21,245,000.00 - 2.26 % 2.59 % 4.63 % 4.98 %
F 8,945,000.00 - - - - 8,945,000.00 - 0.95 % 1.09 % 3.63 % 3.84 %
G 8,945,000.00 - - - - 8,945,000.00 - 0.95 % 1.09 % 2.62 % 2.69 %
H 20,987,913.95 - - - - 20,987,913.95 2,493,110.05 2.49 % 2.56 % 0.00 % 0.00 %
R - - - - - - - 0.00 % 0.00 % 0.00 % 0.00 %
VRR 41,091,570.69 31,207.85 - - - 41,060,362.84 131,216.31 5.00 % 5.00 % 0.00 % 0.00 %
Total 821,831,412.54 624,156.93 - - - 821,207,255.61 2,624,326.36 99.99 % 100.01 %
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
RECONCILIATION DETAIL
September 17, 2025
SOURCE OF FUNDS ALLOCATION OF FUNDS
Interest Funds Available Scheduled Fees
Scheduled Interest 2,876,657.28 Servicing Fee 4,363.03
Prepayment Interest Shortfall - Trustee/Certificate Administrator Fee 4,670.74
Interest Adjustments - Operating Advisor Fee 764.36
ASER Amount - Asset Representations Reviewer Ongoing Fee 165.00
Realized Loss in Excess of Principal Balance - CREFC Intellectual Property Royalty License Fee 353.83
Total Interest Funds Available 2,876,657.28 Total Scheduled Fees 10,316.96
Principal Funds Available Additional Fees, Expenses, etc.
Scheduled Principal 624,156.93 Additional Servicing Fee -
Curtailments - Special Servicing Fee 7,000.00
Unscheduled Principal Collections - Work-out Fee 2,976.94
Net Liquidation Proceeds - Liquidation Fee -
Repurchased Principal - Trust Fund Expenses -
Substitution Principal - Trust Advisor Expenses -
Other Principal - Reimbursement of Nonrecoverable Advances To the Servicer -
Reimbursement of Interest on Advances to the Servicer -
Total Principal Funds Available 624,156.93
Borrower Reimbursable Trust Fund Expenses -
Other Funds Available
Other Expenses -
Yield Maintenance Charges -
Withdrawal of Withheld Amounts from the Interest Reserve Total Additional Fees, Expenses, etc. 9,976.94
Account -
Distributions
Deposit of Withheld Amounts to the Interest Reserve Account -
Interest Distribution 2,856,363.38
Total Other Funds Available - Principal Distribution 624,156.93
Yield Maintenance Charge Distribution -
Total Distributions 3,480,520.31
Total Funds Available 3,500,814.21
Total Funds Allocated 3,500,814.21
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
OTHER INFORMATION
Interest Reserve Account Information
September 17, 2025
Beginning Interest Reserve Account Balance 0.00
Deposit of Withheld Amounts to the Interest Reserve Account 0.00
Withdrawal of Withheld Amounts from the Interest Reserve Account 0.00
Ending Interest Reserve Account Balance 0.00
Excess Liquidation Proceeds Reserve Account Information
Beginning Excess Liquidation Proceeds Reserve Account Balance 0.00
Deposit to the Excess Liquidation Proceeds Reserve Account 0.00
Withdrawal from the Excess Liquidation Proceeds Reserve Account 0.00
Ending Excess Liquidation Proceeds Reserve Account Balance 0.00
ARD Mortgage Loan Information
Excess Interest 0.00
Collateral Information
% of Cut-Off Principal Balance Outstanding 87.215777 %
Controlling Class Information
The Controlling Class is Class H.
The Controlling Class Representative is Investin Pro RED Holdings, LLC
There Are No Disclosable Special Servicer Fees.
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
STRATIFICATION DETAIL
September 17, 2025
Anticipated Remaining Term
Anticipated Remaining Asset Ending Scheduled % of Wtd Avg
Term Range Count Balance Agg.Bal. WAC WAM DSCR
60 Months or Less 47 821,207,255.64 100.00 4.1170 22 2.039057
61 to 90 Months 0 0.00 0.00 0.0000 0 0.000000
91 Months or Greater 0 0.00 0.00 0.0000 0 0.000000
Total 47 821,207,255.64 100.00 4.1170 22 2.039057
Debt Service Coverage Ratio
Debt Service Coverage Asset Ending Scheduled % of Wtd Avg
Ratio Range Count Balance Agg.Bal. WAC WAM DSCR
1.250 or Less 7 152,196,252.26 18.53 3.7927 22 0.362561
1.251 to 1.500 6 91,616,989.63 11.16 4.6869 22 1.448360
1.501 to 1.750 5 49,098,101.23 5.98 4.3611 22 1.658862
1.751 to 2.000 6 146,376,478.64 17.82 4.1169 21 1.894869
2.001 to 2.250 4 48,537,808.97 5.91 4.4631 22 2.055624
2.251 to 2.500 8 136,426,146.77 16.61 4.2208 22 2.369402
2.501 to 2.750 3 33,229,271.03 4.05 4.3700 22 2.644726
2.751 to 3.000 1 21,500,000.00 2.62 3.8000 22 2.937200
3.001 to 3.250 2 14,689,207.11 1.79 4.2244 23 3.138660
3.251 to 3.500 0 0.00 0.00 0.0000 0 0.000000
3.501 to 3.750 3 54,580,000.00 6.65 4.0642 22 3.670148
3.751 to 4.000 0 0.00 0.00 0.0000 0 0.000000
4.001 or Greater 2 72,957,000.00 8.88 3.4852 22 4.212414
Total 47 821,207,255.64 100.00 4.1170 22 2.039057
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
STRATIFICATION DETAIL
September 17, 2025
Ending Schedule Balance
Ending Schedule Balance Asset Ending Scheduled % of Wtd Avg
Range Count Balance Agg.Bal. WAC WAM DSCR
1 to 5,000,000 6 22,154,816.74 2.70 4.6740 22 1.748796
10,000,001 to 15,000,000 4 52,482,598.22 6.39 4.1681 21 1.413870
15,000,001 to 20,000,000 2 30,700,000.00 3.74 3.3795 22 -0.660290
20,000,001 to 25,000,000 9 201,063,458.90 24.48 4.0652 21 2.408760
25,000,001 to 30,000,000 2 59,751,137.99 7.28 4.5443 23 2.221262
30,000,001 to 35,000,000 0 0.00 0.00 0.0000 0 0.000000
35,000,001 to 40,000,000 2 77,500,000.00 9.44 3.6932 22 1.907613
40,000,001 to 45,000,000 1 41,700,000.00 5.08 4.3200 23 1.835300
45,000,001 to 50,000,000 1 46,765,923.21 5.69 4.6300 23 1.497800
5,000,001 to 10,000,000 17 126,600,333.66 15.42 4.5029 22 2.158022
50,000,001 to 55,000,000 2 103,488,986.92 12.60 3.7737 22 2.727323
55,000,001 to 60,000,000 1 59,000,000.00 7.18 3.7700 23 1.947500
60,000,001 to 65,000,000 0 0.00 0.00 0.0000 0 0.000000
65,000,001 to 70,000,000 0 0.00 0.00 0.0000 0 0.000000
70,000,001 to 75,000,000 0 0.00 0.00 0.0000 0 0.000000
75,000,001 to 80,000,000 0 0.00 0.00 0.0000 0 0.000000
80,000,001 to 85,000,000 0 0.00 0.00 0.0000 0 0.000000
85,000,000+ 0 0.00 0.00 0.0000 0 0.000000
Total 47 821,207,255.64 100.00 4.1170 22 2.039057
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
STRATIFICATION DETAIL
September 17, 2025
Loan Rate
Asset Ending Scheduled % of Wtd Avg
Loan Rate Range Count Balance Agg.Bal. WAC WAM DSCR
4.00 or Less 11 312,157,000.00 38.01 3.6095 22 2.226002
4.01 to 4.25 7 143,375,836.48 17.46 4.1444 20 1.707808
4.26 to 4.50 13 175,298,530.76 21.35 4.3666 22 2.329487
4.51 to 4.75 9 148,649,319.78 18.10 4.6455 22 1.813548
4.76 to 5.00 6 37,728,357.78 4.59 4.8641 21 1.351629
5.01 to 5.25 1 3,998,210.84 0.49 5.1100 22 1.459300
5.26 to 5.50 0 0.00 0.00 0.0000 0 0.000000
5.51 to 5.75 0 0.00 0.00 0.0000 0 0.000000
5.76 to 6.00 0 0.00 0.00 0.0000 0 0.000000
6.01 to 6.25 0 0.00 0.00 0.0000 0 0.000000
6.26 to 6.50 0 0.00 0.00 0.0000 0 0.000000
6.51 to 6.75 0 0.00 0.00 0.0000 0 0.000000
6.76 to 7.00 0 0.00 0.00 0.0000 0 0.000000
7.01 or Greater 0 0.00 0.00 0.0000 0 0.000000
Total 47 821,207,255.64 100.00 4.1170 22 2.039057
Property Type
Asset Ending Scheduled % of Wtd Avg
Property Type Range Count Balance Agg.Bal. WAC WAM DSCR
Industrial 0 0.00 0.00 0.0000 0 0.000000
Lodging 4 106,527,900.75 12.97 4.6232 23 2.011144
Mixed Use 7 161,763,700.94 19.70 3.7883 22 2.918705
Multifamily 3 71,335,172.85 8.69 4.2863 22 2.074074
Office 8 123,120,777.71 14.99 4.2443 22 1.022501
Other 4 78,200,000.00 9.52 3.4958 22 0.311294
Retail 11 183,633,536.41 22.36 4.1389 21 2.154992
Self Storage 9 90,807,794.23 11.06 4.2420 22 3.097676
Total 47 821,207,255.64 100.00 4.1170 22 2.039057
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
STRATIFICATION DETAIL
September 17, 2025
Remaining Amortization Term
Remaining Amortization Asset Ending Scheduled % of Wtd Avg
Term Range Count Balance Agg.Bal. WAC WAM DSCR
240 Months or Less 24 563,938,260.09 68.67 3.9388 22 2.139428
241 to 270 Months 23 257,268,995.55 31.33 4.5075 22 1.819042
271 to 300 Months 0 0.00 0.00 0.0000 0 0.000000
301 Months or Greater 0 0.00 0.00 0.0000 0 0.000000
Total 47 821,207,255.64 100.00 4.1170 22 2.039057
Seasoning
Asset Ending Scheduled % of Wtd Avg
Seasoning Range Count Balance Agg.Bal. WAC WAM DSCR
12 Months or Less 0 0.00 0.00 0.0000 0 0.000000
13 to 24 Months 0 0.00 0.00 0.0000 0 0.000000
25 to 36 Months 0 0.00 0.00 0.0000 0 0.000000
37 to 48 Months 0 0.00 0.00 0.0000 0 0.000000
49 Months or Greater 47 821,207,255.64 100.00 4.1170 22 2.039057
Total 47 821,207,255.64 100.00 4.1170 22 2.039057
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
STRATIFICATION DETAIL
September 17, 2025
State
Asset Ending Scheduled % of Wtd Avg
State Range Count Balance Agg.Bal. WAC WAM DSCR
Alabama 0 0.00 0.00 0.0000 0 0.000000
Arizona 0 0.00 0.00 0.0000 0 0.000000
California 3 75,316,938.05 9.17 4.3777 22 2.240205
Florida 4 31,605,000.00 3.85 4.2439 22 3.081989
Georgia 0 0.00 0.00 0.0000 0 0.000000
Illinois 3 15,952,999.88 1.94 4.8537 22 1.176450
Indiana 1 4,668,334.04 0.57 4.7900 22 1.382000
Kansas 1 13,094,349.17 1.59 4.8500 19 1.408000
Kentucky 0 0.00 0.00 0.0000 0 0.000000
Maryland 0 0.00 0.00 0.0000 0 0.000000
Michigan 1 21,466,481.74 2.61 4.5900 23 1.390000
N/A 3 67,700,000.00 8.24 3.4300 22 0.000000
Nevada 1 9,463,700.94 1.15 4.2591 22 2.524600
New Jersey 0 0.00 0.00 0.0000 0 0.000000
New York 11 234,302,508.19 28.53 3.9351 22 2.400292
North Carolina 0 0.00 0.00 0.0000 0 0.000000
Ohio 1 7,112,672.85 0.87 4.4890 22 2.485600
Pennsylvania 1 23,000,000.00 2.80 4.0510 22 1.662800
Texas 5 54,491,910.87 6.64 4.3814 22 1.974728
Various 0 0.00 0.00 0.0000 0 0.000000
Total 47 821,207,255.64 100.00 4.1170 22 2.039057
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
MORTGAGE LOAN DETAIL
September 17, 2025
Prop Paid Beginning Ending Payment Workout Mod
Type Through Gross Interest Principal Scheduled Scheduled Maturity Status Strategy Code
Loan ID OMCR (1) City State Date Coupon Payment Payment Balance Balance Date (2 ) (3 ) (4 )
304101882 1 MU New York NY 09/09/2025 3.43000 % 73,840.28 - 25,000,000.00 25,000,000.00 06/09/2027 0 0 0
304101843 10 RT New York NY 09/06/2025 4.36600 % 112,788.33 - 30,000,000.00 30,000,000.00 08/06/2027 0 0 0
1749262 11 OF Troy MI 09/01/2025 4.59000 % 85,018.73 43,633.06 21,510,114.80 21,466,481.74 08/01/2027 0 0 0
1647690 12 RT Various XX 09/01/2025 4.19000 % 88,528.15 - 24,536,250.00 24,536,250.00 11/01/2026 0 0 0
1749833 13 LO Lafayette LA 09/01/2025 4.42000 % 78,497.99 42,972.22 20,624,199.38 20,581,227.16 08/01/2027 0 0 8
300801642 14 MU Lahaska PA 09/01/2025 4.05100 % 80,232.31 - 23,000,000.00 23,000,000.00 07/01/2027 0 0 0
1749778 15 MF Dallas TX 09/01/2025 4.16000 % 80,680.60 - 22,522,500.00 22,522,500.00 07/01/2027 0 0 0
304101831 16 MU Corona NY 09/06/2025 4.36000 % 82,597.78 - 22,000,000.00 22,000,000.00 07/06/2027 0 0 0
300801633 17 MU New Rochelle NY 09/01/2025 3.80000 % 70,352.78 - 21,500,000.00 21,500,000.00 07/01/2027 0 0 0
308511018 18 RT Torrance CA 09/01/2025 3.65750 % 64,429.61 - 20,457,000.00 20,457,000.00 06/01/2027 0 0 0
304101851 19 OF New York NY 09/06/2025 3.33000 % 44,446.25 - 15,500,000.00 15,500,000.00 08/06/2027 0 0 0
304101891 1 A N/A 09/09/2025 3.43000 % 44,304.17 - 15,000,000.00 15,000,000.00 06/09/2027 0 0 0
453011619 1 B N/A 09/09/2025 3.43000 % 44,894.89 - 15,200,000.00 15,200,000.00 06/09/2027 0 0 0
453011576 1 C N/A 09/09/2025 3.43000 % 110,760.42 - 37,500,000.00 37,500,000.00 06/09/2027 0 0 0
1749343 2 RT Metairie LA 09/01/2025 3.77000 % 191,536.94 - 59,000,000.00 59,000,000.00 08/01/2027 0 0 0
300801632 20 OF Wichita KS 09/01/2025 4.85000 % 54,794.34 25,678.66 13,120,027.83 13,094,349.17 04/01/2027 0 0 0
304101858 21 SS Various XX 09/06/2025 4.51000 % 54,026.19 23,080.32 13,911,329.37 13,888,249.05 08/06/2027 0 0 0
1749084 22 RT Plano TX 09/01/2025 4.64000 % 31,297.87 40,807.40 7,833,170.40 7,792,363.00 08/01/2027 0 0 0
1648607 24 LO El Paso TX 09/01/2025 4.71500 % 38,361.82 18,787.56 9,448,399.95 9,429,612.39 08/01/2027 0 8 8
1749362 25 OF Houston TX 09/01/2025 4.25000 % 33,877.08 19,916.55 9,256,735.78 9,236,819.23 07/01/2027 0 0 0
304101839 26 N/A Maitland FL 09/06/2025 3.92000 % 35,443.33 - 10,500,000.00 10,500,000.00 07/06/2027 0 0 0
1647637 27 OF Rochester NY 08/01/2025 4.28000 % 20,960.28 35,555.33 5,687,142.21 5,651,586.88 08/01/2027 B 11 0
203041833 29 MU Reno NV 09/06/2025 4.25906 % 34,761.48 14,485.56 9,478,186.50 9,463,700.94 07/06/2027 0 0 0
1749761 3 OF Milwaukee WI 09/01/2025 4.14000 % 182,100.17 91,005.74 51,079,992.66 50,988,986.92 07/01/2027 0 0 0
304101859 30 RT Chicago IL 01/06/2020 4.91000 % - - 8,770,446.11 8,770,446.11 08/06/2027 3 2 0
304101862 31 RT Ka'anapali HI 09/06/2025 4.08000 % 28,735.05 14,648.45 8,178,855.56 8,164,207.11 08/06/2027 0 0 0
308511032 32 RT Hercules CA 09/06/2025 4.74000 % 33,082.81 11,205.99 8,105,220.83 8,094,014.84 08/06/2027 0 0 0
1749956 33 MU Brooklyn NY 09/01/2025 4.40000 % 31,447.78 - 8,300,000.00 8,300,000.00 08/01/2027 0 0 0
300801641 34 MF Marysville OH 09/01/2025 4.48900 % 27,540.35 11,930.14 7,124,602.99 7,112,672.85 07/01/2027 0 0 0
300801651 35 SS Miami Gardens FL 09/01/2025 4.40500 % 29,321.39 - 7,730,000.00 7,730,000.00 08/01/2027 0 0 0
300801648 36 SS Hialeah FL 09/01/2025 4.40500 % 25,983.38 - 6,850,000.00 6,850,000.00 08/01/2027 0 0 0
300801649 37 SS Hialeah FL 09/01/2025 4.40500 % 24,750.59 - 6,525,000.00 6,525,000.00 08/01/2027 0 0 0
Reports Available at sf.citidirect.com v. 21.09.28 Page 14 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
MORTGAGE LOAN DETAIL
September 17, 2025
Prop Paid Beginning Ending Payment Workout Mod
Type Through Gross Interest Principal Scheduled Scheduled Maturity Status Strategy Code
Loan ID OMCR (1) City State Date Coupon Payment Payment Balance Balance Date (2 ) (3 ) (4 )
1749521 38 RT Saugerties NY 09/01/2025 4.73000 % 24,272.06 8,255.60 5,959,176.91 5,950,921.31 08/01/2027 0 0 0
304101856 39 RT Brooklyn NY 09/06/2025 4.45000 % 23,758.06 - 6,200,000.00 6,200,000.00 08/06/2027 0 0 0
304101861 4 LO San Diego CA 09/06/2025 4.63000 % 186,894.89 110,798.72 46,876,721.93 46,765,923.21 08/06/2027 0 8 8
300801659 40 MH Brookings OR 09/01/2025 4.92000 % 24,683.40 7,765.12 5,826,137.87 5,818,372.75 08/01/2027 0 0 0
304101838 41 SS Balch Springs TX 09/06/2025 4.57000 % 21,721.65 9,108.33 5,519,724.58 5,510,616.25 07/06/2027 0 0 0
300801640 42 SS Castle Rock CO 09/01/2025 4.23500 % 18,001.82 9,252.13 4,936,325.35 4,927,073.22 07/01/2027 0 0 0
1749567 43 RT Goshen IN 09/01/2025 4.79000 % 19,288.43 7,962.75 4,676,296.79 4,668,334.04 07/01/2027 0 0 0
1749823 45 OF Barrington IL 09/01/2025 5.11000 % 17,626.30 7,513.55 4,005,724.39 3,998,210.84 07/01/2027 0 0 0
300801653 46 SS Shreveport LA 09/01/2025 4.77300 % 15,452.06 6,384.63 3,759,549.71 3,753,165.08 08/01/2027 0 0 0
300801652 47 OF Skokie IL 09/01/2025 4.37700 % 12,023.93 5,804.77 3,190,147.70 3,184,342.93 08/01/2027 0 0 0
300801650 48 SS Baton Rouge LA 09/01/2025 4.95300 % 6,936.58 2,674.57 1,626,365.20 1,623,690.63 08/01/2027 0 0 0
300801657 5 MU Bronx NY 09/01/2025 3.41800 % 154,522.08 - 52,500,000.00 52,500,000.00 08/01/2027 0 0 0
304101849 7 MF New York NY 09/06/2025 4.32000 % 155,124.00 - 41,700,000.00 41,700,000.00 08/06/2027 0 0 0
308511008 8 SS Various XX 09/06/2025 3.94000 % 135,711.11 - 40,000,000.00 40,000,000.00 07/06/2027 0 0 0
300801656 9 LO Various XX 09/01/2025 4.72400 % 121,247.77 54,929.78 29,806,067.77 29,751,137.99 08/01/2027 0 0 0
Total Count = 47 2,876,657.28 624,156.93 821,831,412.57 821,207,255.64
Reports Available at sf.citidirect.com v. 21.09.28 Page 15 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
NOI DETAIL
September 17, 2025
Property Ending Preceding Most Most Recent Most Recent
Type Scheduled Fiscal Recent Financial As of Financial Asof
Loan ID OMCR (1) City State Balance Year NOI NOI Start Date End Date
304101882 1 MU New York NY 25,000,000.00 191,484,942.44 94,476,466.36 01/01/2025 06/30/2025
304101843 10 RT New York NY 30,000,000.00 2,630,482.76 1,377,998.00 01/01/2025 06/30/2025
1749262 11 OF Troy MI 21,466,481.74 2,580,665.74 1,346,927.45 01/01/2025 06/30/2025
1647690 12 RT Various XX 24,536,250.00 1,850,786.91 1,209,861.96 01/01/2025 06/30/2025
1749833 13 LO Lafayette LA 20,581,227.16 5,070,580.52 4,535,756.92 07/01/2024 06/30/2025
300801642 14 MU Lahaska PA 23,000,000.00 2,737,569.02 431,260.35 01/01/2025 03/31/2025
1749778 15 MF Dallas TX 22,522,500.00 2,288,834.10 1,174,292.36 01/01/2025 06/30/2025
304101831 16 MU Corona NY 22,000,000.00 2,194,721.64 1,225,476.37 01/01/2025 06/30/2025
300801633 17 MU New Rochelle NY 21,500,000.00 4,278,138.28 684,012.00 01/01/2025 03/31/2025
308511018 18 RT Torrance CA 20,457,000.00 59,746,222.00 44,097,365.00 Not Available Not Available
304101851 19 OF New York NY 15,500,000.00 646,698.51 (119,489.48 ) Not Available Not Available
304101891 1 A N/A 15,000,000.00 - - Not Available Not Available
453011619 1 B N/A 15,200,000.00 - - Not Available Not Available
453011576 1 C N/A 37,500,000.00 - - Not Available Not Available
1749343 2 RT Metairie LA 59,000,000.00 17,197,853.81 3,580,555.00 01/01/2025 03/31/2025
300801632 20 OF Wichita KS 13,094,349.17 1,230,397.39 1,088,531.98 Not Available Not Available
304101858 21 SS Various XX 13,888,249.05 2,060,726.75 1,056,841.64 01/01/2025 06/30/2025
1749084 22 RT Plano TX 7,792,363.00 1,272,584.00 966,211.00 Not Available Not Available
1648607 24 LO El Paso TX 9,429,612.39 1,542,528.17 1,551,569.12 07/01/2024 06/30/2025
1749362 25 OF Houston TX 9,236,819.23 1,119,548.00 511,040.46 01/01/2025 06/30/2025
304101839 26 N/A Maitland FL 10,500,000.00 955,436.00 482,448.00 01/01/2025 06/30/2025
1647637 27 OF Rochester NY 5,651,586.88 1,635,663.00 1,585,836.00 01/01/2025 03/31/2025
203041833 29 MU Reno NV 9,463,700.94 12,679,152.27 3,217,102.97 01/01/2025 03/31/2025
1749761 3 OF Milwaukee WI 50,988,986.92 8,154,416.17 6,381,643.54 Not Available Not Available
304101859 30 RT Chicago IL 8,770,446.11 384,123.00 84,600.00 Not Available Not Available
304101862 31 RT Ka'anapali HI 8,164,207.11 1,079,315.57 866,006.35 01/01/2025 06/30/2025
308511032 32 RT Hercules CA 8,094,014.84 904,708.00 460,268.15 01/01/2025 06/30/2025
1749956 33 MU Brooklyn NY 8,300,000.00 571,362.05 150,171.77 01/01/2025 03/31/2025
300801641 34 MF Marysville OH 7,112,672.85 1,150,008.63 605,244.04 01/01/2025 06/30/2025
300801651 35 SS Miami Gardens FL 7,730,000.00 1,260,155.50 637,344.70 01/01/2025 06/30/2025
300801648 36 SS Hialeah FL 6,850,000.00 1,036,491.34 543,535.51 01/01/2025 06/30/2025
300801649 37 SS Hialeah FL 6,525,000.00 933,953.42 462,444.86 01/01/2025 06/30/2025
Reports Available at sf.citidirect.com v. 21.09.28 Page 16 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
NOI DETAIL
September 17, 2025
Property Ending Preceding Most Most Recent Most Recent
Type Scheduled Fiscal Recent Financial As of Financial Asof
Loan ID OMCR (1) City State Balance Year NOI NOI Start Date End Date
1749521 38 RT Saugerties NY 5,950,921.31 712,467.00 531,853.00 Not Available Not Available
304101856 39 RT Brooklyn NY 6,200,000.00 513,664.01 258,119.49 01/01/2025 06/30/2025
304101861 4 LO San Diego CA 46,765,923.21 6,907,263.48 6,106,322.99 07/01/2024 06/30/2025
300801659 40 MH Brookings OR 5,818,372.75 792,245.45 654,255.59 Not Available Not Available
304101838 41 SS Balch Springs TX 5,510,616.25 688,898.78 542,533.41 Not Available Not Available
300801640 42 SS Castle Rock CO 4,927,073.22 697,896.91 332,335.03 01/01/2024 06/30/2024
1749567 43 RT Goshen IN 4,668,334.04 510,271.03 242,750.52 01/01/2025 06/30/2025
1749823 45 OF Barrington IL 3,998,210.84 447,957.17 245,499.59 01/01/2025 06/30/2025
300801653 46 SS Shreveport LA 3,753,165.08 466,900.54 226,954.97 Not Available Not Available
300801652 47 OF Skokie IL 3,184,342.93 637,004.41 305,385.50 01/01/2025 06/30/2025
300801650 48 SS Baton Rouge LA 1,623,690.63 151,113.47 78,499.57 Not Available Not Available
300801657 5 MU Bronx NY 52,500,000.00 7,293,705.89 2,005,124.79 01/01/2025 03/31/2025
304101849 7 MF New York NY 41,700,000.00 3,266,504.36 831,461.09 01/01/2025 03/31/2025
308511008 8 SS Various XX 40,000,000.00 12,038,684.58 5,956,445.99 01/01/2025 06/30/2025
300801656 9 LO Various XX 29,751,137.99 5,670,092.00 5,696,416.08 07/01/2024 06/30/2025
Total Count = 47 821,207,255.64 371,472,734.07 198,685,279.99
Reports Available at sf.citidirect.com v. 21.09.28 Page 17 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
DELINQUENCY LOAN DETAIL
September 17, 2025
Actual Paid Current P&I Total P&I Cumulative Other Expense Payment Workout Most Recent
Principal Through Advances Advances Accrued Unpaid Advances Status Strategy Special Serv Foreclosure Bankruptcy REO
Loan ID OMCR Balance Date (Net of ASER) Outstanding Interest Advances Outstanding (2 ) (3 ) Transfer Date Date Date Date
1647637 27 5,687,142.21 08/01/2025 56,515.61 56,491.12 31.43 6,336.00 B 11 09/20/2021
304101859 30 9,401,987.23 01/06/2020 - - 174,688.05 - 3 2 01/21/2020
Total Count = 2 15,089,129.44 56,515.61 56,491.12 174,719.48 6,336.00
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
COLLATERAL PERFORMANCE - DELINQUENCY AND LOAN STATUS DETAIL
–
September 17, 2025
Delinquent
(Does not include loans in Bankruptcy, Foreclosure, or REO)
30 Day 60 Day 90 Day 120 + Day Bankruptcy Foreclosure REO
Distribution
Date Count Balance Count Balance Count Balance Count Balance Count Balance Count Balance Count Balance
0 0 0 0 0 0 1 8,770,446 0 0 0 0 0 0
09/17/2025
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 1 8,770,446 0 0 0 0 0 0
08/15/2025
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 1 8,770,446 0 0 0 0 0 0
07/17/2025
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 1 8,770,446 0 0 0 0 0 0
06/17/2025
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 1 8,770,446 0 0 0 0 0 0
05/16/2025
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 1 8,342,938 0 0 1 8,770,446 0 0 0 0 0 0
04/17/2025
0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
1 8,368,611 0 0 0 0 1 8,770,446 0 0 0 0 0 0
03/17/2025
2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 1 8,770,446 0 0 0 0 0 0
02/18/2025
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 1 8,770,446 0 0 0 0 0 0
01/17/2025
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 1 8,770,446 0 0 0 0 0 0
12/17/2024
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 1 8,770,446 0 0 0 0 0 0
11/18/2024
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 1 8,770,446 0 0 0 0 0 0
10/18/2024
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 2.1 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
Reports Available at sf.citidirect.com v. 21.09.28 Page 19 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
APPRAISAL REDUCTION DETAIL
September 17, 2025
Beginning Ending Appraisal Appraisal Most Recent Cumulative
Loan ID OMCR Property Name Scheduled Balance Scheduled Balance Reduction Amount Reduction Date ASER Amount ASER Amount
1647637 27 Clinton Crossings Medical Office 5,687,142.21 5,651,586.88 - 11/12/2024 - -
304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 7,228,068.59 02/11/2025 - 571,999.49
Total Count = 2 14,457,588.32 14,422,032.99 7,228,068.59 - 571,999.49
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
HISTORICAL APPRAISAL REDUCTION DETAIL
September 17, 2025
Distribution Beginning Ending Appraisal Appraisal Most Recent Cumulative
Date Loan ID OMCR Property Name Scheduled Balance Scheduled Balance Reduction Amount Reduction Date ASER Amount ASER Amount
9/17/2025 1647637 27 Clinton Crossings Medical Office 5,687,142.21 5,651,586.88 - 11/12/2024 - -
9/17/2025 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 7,228,068.59 02/11/2025 - 571,999.49
8/15/2025 1647637 27 Clinton Crossings Medical Office 5,722,566.98 5,687,142.21 - 11/12/2024 - -
8/15/2025 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 7,228,068.59 02/11/2025 - 571,999.49
7/17/2025 1647637 27 Clinton Crossings Medical Office 5,758,543.78 5,722,566.98 - 11/12/2024 - -
7/17/2025 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 7,228,068.59 02/11/2025 - 571,999.49
6/17/2025 1647637 27 Clinton Crossings Medical Office 8,316,178.80 5,758,543.78 - 11/12/2024 - -
6/17/2025 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 7,228,068.59 02/11/2025 - 571,999.49
5/16/2025 1647637 27 Clinton Crossings Medical Office 8,342,937.93 8,316,178.80 - 11/12/2024 - -
5/16/2025 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 7,228,068.59 02/11/2025 - 571,999.49
4/17/2025 1647637 27 Clinton Crossings Medical Office 8,368,610.56 8,342,937.93 - 11/12/2024 - -
4/17/2025 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 7,228,068.59 02/11/2025 - 571,999.49
3/17/2025 1647637 27 Clinton Crossings Medical Office 8,397,172.91 8,368,610.56 - 11/12/2024 - -
3/17/2025 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 7,228,068.59 02/11/2025 - 571,999.49
2/18/2025 1647637 27 Clinton Crossings Medical Office 8,422,646.39 8,397,172.91 - 11/12/2024 - -
2/18/2025 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 7,228,068.59 02/11/2025 - 571,999.49
1/17/2025 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 6,077,655.10 02/12/2024 - 571,999.49
12/17/2024 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 6,077,655.10 02/12/2024 - 571,999.49
11/18/2024 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 6,077,655.10 02/12/2024 - 571,999.49
10/18/2024 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 6,077,655.10 02/12/2024 - 571,999.49
9/17/2024 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 6,077,655.10 02/12/2024 - 571,999.49
8/16/2024 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 6,077,655.10 02/12/2024 - 571,999.49
7/17/2024 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 6,077,655.10 02/12/2024 - 571,999.49
6/17/2024 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 6,077,655.10 02/12/2024 - 571,999.49
5/17/2024 1647637 27 Clinton Crossings Medical Office 8,651,745.34 8,626,087.62 - 12/11/2023 - -
5/17/2024 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 6,077,655.10 02/12/2024 - 571,999.49
4/17/2024 1647637 27 Clinton Crossings Medical Office 8,676,284.02 8,651,745.34 - 12/11/2023 - -
4/17/2024 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 6,077,655.10 02/12/2024 - 571,999.49
3/15/2024 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 6,077,655.10 02/12/2024 - 571,999.49
2/16/2024 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 6,077,655.10 02/12/2024 - 571,999.49
1/18/2024 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 4,876,065.98 02/13/2023 - 571,999.49
12/15/2023 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 4,876,065.98 02/13/2023 - 571,999.49
11/17/2023 304101859 30 4901 West Irving Park 8,770,446.11 8,770,446.11 4,876,065.98 02/13/2023 - 571,999.49
Reports Available at sf.citidirect.com v. 21.09.28 Page 21 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
HISTORICAL APPRAISAL REDUCTION DETAIL
September 17, 2025
Distribution Beginning Ending Appraisal Appraisal Most Recent Cumulative
Date Loan ID OMCR Property Name Scheduled Balance Scheduled Balance Reduction Amount Reduction Date ASER Amount ASER Amount
10/17/2023 304101859 30 4901 West Irving Park 8,786,300.63 8,770,446.11 4,876,065.98 02/13/2023 19,930.92 571,999.49
9/15/2023 304101859 30 4901 West Irving Park 8,800,895.09 8,786,300.63 4,876,065.98 02/13/2023 20,595.28 552,068.57
8/17/2023 304101859 30 4901 West Irving Park 8,815,428.10 8,800,895.09 4,876,065.98 02/13/2023 20,595.28 531,473.29
7/17/2023 304101859 30 4901 West Irving Park 8,831,099.32 8,815,428.10 4,876,065.98 02/13/2023 19,930.92 510,878.01
6/16/2023 304101859 30 4901 West Irving Park 8,845,505.16 8,831,099.32 4,876,065.98 02/13/2023 20,595.29 490,947.09
5/17/2023 304101859 30 4901 West Irving Park 8,861,053.81 8,845,505.16 4,876,065.98 02/13/2023 19,930.92 470,351.80
4/17/2023 1647637 27 Clinton Crossings Medical Office 8,969,923.99 8,946,467.53 - 12/12/2022 - -
4/17/2023 304101859 30 4901 West Irving Park 8,875,333.54 8,861,053.81 4,876,065.98 02/13/2023 20,595.28 450,420.88
3/17/2023 304101859 30 4901 West Irving Park 8,893,176.62 8,875,333.54 4,876,065.98 02/13/2023 18,602.19 429,825.60
2/17/2023 304101859 30 4901 West Irving Park 8,907,321.10 8,893,176.62 4,876,065.98 02/13/2023 20,595.29 411,223.41
1/18/2023 304101859 30 4901 West Irving Park 8,921,406.03 8,907,321.10 3,964,600.49 02/11/2022 16,745.48 390,628.12
12/16/2022 304101859 30 4901 West Irving Park 8,936,645.39 8,921,406.03 3,964,600.49 02/11/2022 16,205.30 373,882.64
11/18/2022 304101859 30 4901 West Irving Park 8,950,606.86 8,936,645.39 3,964,600.49 02/11/2022 16,745.48 357,677.34
10/17/2022 304101859 30 4901 West Irving Park 8,965,727.22 8,950,606.86 3,964,600.49 02/11/2022 16,205.30 340,931.86
9/16/2022 304101859 30 4901 West Irving Park 8,979,566.25 8,965,727.22 3,964,600.49 02/11/2022 16,745.48 324,726.56
8/17/2022 304101859 30 4901 West Irving Park 8,993,347.01 8,979,566.25 3,964,600.49 02/11/2022 16,745.48 307,981.08
7/15/2022 304101859 30 4901 West Irving Park 9,008,293.21 8,993,347.01 3,964,600.49 02/11/2022 16,205.31 291,235.60
6/17/2022 304101859 30 4901 West Irving Park 9,021,953.02 9,008,293.21 3,964,600.49 02/11/2022 16,745.48 275,030.29
5/17/2022 304101859 30 4901 West Irving Park 9,036,782.65 9,021,953.02 3,964,600.49 02/11/2022 16,205.30 258,284.81
4/15/2022 304101859 30 4901 West Irving Park 9,050,322.51 9,036,782.65 3,964,600.49 02/11/2022 16,745.48 242,079.51
3/17/2022 304101859 30 4901 West Irving Park 9,067,499.87 9,050,322.51 3,964,600.49 02/11/2022 15,124.95 225,334.03
2/17/2022 304101859 30 4901 West Irving Park 9,080,910.41 9,067,499.87 3,964,600.49 02/11/2022 16,745.48 210,209.08
1/18/2022 304101859 30 4901 West Irving Park 9,094,264.48 9,080,910.41 2,716,535.50 03/11/2021 11,473.97 193,463.60
12/17/2021 304101859 30 4901 West Irving Park 9,108,799.44 9,094,264.48 2,716,535.50 03/11/2021 11,103.84 181,989.63
11/18/2021 304101859 30 4901 West Irving Park 9,122,036.09 9,108,799.44 2,716,535.50 03/11/2021 11,473.97 170,885.79
10/18/2021 304101859 30 4901 West Irving Park 9,136,457.88 9,122,036.09 2,716,535.50 03/11/2021 11,103.84 159,411.82
9/17/2021 304101859 30 4901 West Irving Park 9,149,578.09 9,136,457.88 2,716,535.50 03/11/2021 11,473.97 148,307.98
8/17/2021 304101859 30 4901 West Irving Park 9,162,643.06 9,149,578.09 2,716,535.50 03/11/2021 11,473.97 136,834.01
7/16/2021 304101859 30 4901 West Irving Park 9,176,899.38 9,162,643.06 2,716,535.50 03/11/2021 11,103.84 125,360.04
6/17/2021 304101859 30 4901 West Irving Park 9,189,849.32 9,176,899.38 2,716,535.50 03/11/2021 11,473.97 114,256.20
5/17/2021 304101859 30 4901 West Irving Park 9,203,994.77 9,189,849.32 2,716,535.50 03/11/2021 11,103.84 102,782.23
5/17/2021 304101861 4 Old Town San Diego Hotel Portfolio 52,238,198.79 52,142,057.56 - (152,355.24 ) -
4/16/2021 304101859 30 4901 West Irving Park 9,216,830.63 9,203,994.77 2,716,535.50 03/11/2021 11,473.97 91,678.39
Reports Available at sf.citidirect.com v. 21.09.28 Page 22 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
HISTORICAL APPRAISAL REDUCTION DETAIL
September 17, 2025
Distribution Beginning Ending Appraisal Appraisal Most Recent Cumulative
Date Loan ID OMCR Property Name Scheduled Balance Scheduled Balance Reduction Amount Reduction Date ASER Amount ASER Amount
4/16/2021 304101861 4 Old Town San Diego Hotel Portfolio 52,327,266.50 52,238,198.79 13,176,669.56 12/11/2020 - 152,355.24
3/17/2021 1648607 24 Hotel Indigo El Paso 10,395,520.76 10,376,494.06 - (10,601.99 ) -
3/17/2021 304101859 30 4901 West Irving Park 9,233,374.53 9,216,830.63 2,716,535.50 03/11/2021 10,363.58 80,204.42
3/17/2021 304101861 4 Old Town San Diego Hotel Portfolio 52,436,131.77 52,327,266.50 13,176,669.56 12/11/2020 47,399.41 152,355.24
2/18/2021 1648607 24 Hotel Indigo El Paso 10,410,402.46 10,395,520.76 - 12/11/2020 - 10,601.99
2/18/2021 304101859 30 4901 West Irving Park 9,246,086.69 9,233,374.53 1,675,140.96 04/13/2020 7,075.38 69,840.84
2/18/2021 304101861 4 Old Town San Diego Hotel Portfolio 52,524,413.46 52,436,131.77 13,176,669.56 12/11/2020 52,477.92 104,955.83
1/15/2021 1648607 24 Hotel Indigo El Paso 10,425,223.98 10,410,402.46 - 12/11/2020 - 10,601.99
1/15/2021 304101859 30 4901 West Irving Park 9,258,745.33 9,246,086.69 1,675,140.96 04/13/2020 7,075.38 62,765.46
1/15/2021 304101861 4 Old Town San Diego Hotel Portfolio 52,612,344.58 52,524,413.46 13,176,669.56 12/11/2020 52,477.91 52,477.91
12/17/2020 1648607 24 Hotel Indigo El Paso 10,441,347.57 10,425,223.98 - 12/11/2020 - 10,601.99
12/17/2020 304101859 30 4901 West Irving Park 9,272,610.03 9,258,745.33 1,675,140.96 04/13/2020 6,847.14 55,690.08
12/17/2020 304101861 4 Old Town San Diego Hotel Portfolio 52,706,678.26 52,612,344.58 13,176,669.56 12/11/2020 - -
11/18/2020 1648607 24 Hotel Indigo El Paso 10,456,043.96 10,441,347.57 2,614,010.99 11/12/2020 10,601.99 10,601.99
11/18/2020 304101859 30 4901 West Irving Park 9,285,157.00 9,272,610.03 1,675,140.96 04/13/2020 7,075.38 48,842.94
10/19/2020 304101859 30 4901 West Irving Park 9,298,914.07 9,285,157.00 1,675,140.96 04/13/2020 6,847.14 41,767.56
9/17/2020 304101859 30 4901 West Irving Park 9,311,350.29 9,298,914.07 1,675,140.96 04/13/2020 7,075.38 34,920.42
8/17/2020 304101859 30 4901 West Irving Park 9,323,734.15 9,311,350.29 1,675,140.96 04/13/2020 7,075.38 27,845.04
7/17/2020 304101859 30 4901 West Irving Park 9,337,334.02 9,323,734.15 1,675,140.96 04/13/2020 6,847.14 20,769.66
6/17/2020 304101859 30 4901 West Irving Park 9,349,608.49 9,337,334.02 1,675,140.96 04/13/2020 7,075.38 13,922.52
5/15/2020 304101859 30 4901 West Irving Park 9,363,102.92 9,349,608.49 1,675,140.96 04/13/2020 6,847.14 6,847.14
4/17/2020 304101859 30 4901 West Irving Park 9,375,268.89 9,363,102.92 1,675,140.96 04/13/2020 - -
Reports Available at sf.citidirect.com v. 21.09.28 Page 23 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
LOAN MODIFICATION DETAIL
September 17, 2025
Modification Modification
Loan ID OMCR Property Name Date Code (4)
1749833 13 DoubleTree Lafayette 04/01/2020 8
1648607 24 Hotel Indigo El Paso 07/01/2020 8
304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
Total Count = 3
Reports Available at sf.citidirect.com v. 21.09.28 Page 24 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
HISTORICAL LOAN MODIFICATION DETAIL
September 17, 2025
Distribution Modification Modification
Date Loan ID OMCR Property Name Date Code (4)
09/17/2025 1749833 13 DoubleTree Lafayette 04/01/2020 8
09/17/2025 1648607 24 Hotel Indigo El Paso 07/01/2020 8
09/17/2025 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
08/15/2025 1749833 13 DoubleTree Lafayette 04/01/2020 8
08/15/2025 1648607 24 Hotel Indigo El Paso 07/01/2020 8
08/15/2025 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
07/17/2025 1749833 13 DoubleTree Lafayette 04/01/2020 8
07/17/2025 1648607 24 Hotel Indigo El Paso 07/01/2020 8
07/17/2025 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
06/17/2025 1749833 13 DoubleTree Lafayette 04/01/2020 8
06/17/2025 1648607 24 Hotel Indigo El Paso 07/01/2020 8
06/17/2025 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
05/16/2025 1749833 13 DoubleTree Lafayette 04/01/2020 8
05/16/2025 1648607 24 Hotel Indigo El Paso 07/01/2020 8
05/16/2025 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
04/17/2025 1749833 13 DoubleTree Lafayette 04/01/2020 8
04/17/2025 1648607 24 Hotel Indigo El Paso 07/01/2020 8
04/17/2025 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
03/17/2025 1749833 13 DoubleTree Lafayette 04/01/2020 8
03/17/2025 1648607 24 Hotel Indigo El Paso 07/01/2020 8
03/17/2025 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
02/18/2025 1749833 13 DoubleTree Lafayette 04/01/2020 8
02/18/2025 1648607 24 Hotel Indigo El Paso 07/01/2020 8
02/18/2025 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
01/17/2025 1749833 13 DoubleTree Lafayette 04/01/2020 8
01/17/2025 1648607 24 Hotel Indigo El Paso 07/01/2020 8
01/17/2025 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
12/17/2024 1749833 13 DoubleTree Lafayette 04/01/2020 8
12/17/2024 1648607 24 Hotel Indigo El Paso 07/01/2020 8
12/17/2024 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
11/18/2024 1749833 13 DoubleTree Lafayette 04/01/2020 8
11/18/2024 1648607 24 Hotel Indigo El Paso 07/01/2020 8
11/18/2024 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
Reports Available at sf.citidirect.com v. 21.09.28 Page 25 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
HISTORICAL LOAN MODIFICATION DETAIL
September 17, 2025
Distribution Modification Modification
Date Loan ID OMCR Property Name Date Code (4)
10/18/2024 1749833 13 DoubleTree Lafayette 04/01/2020 8
10/18/2024 1648607 24 Hotel Indigo El Paso 07/01/2020 8
10/18/2024 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
09/17/2024 1749833 13 DoubleTree Lafayette 04/01/2020 8
09/17/2024 1648607 24 Hotel Indigo El Paso 07/01/2020 8
09/17/2024 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
08/16/2024 1749833 13 DoubleTree Lafayette 04/01/2020 8
08/16/2024 1648607 24 Hotel Indigo El Paso 07/01/2020 8
08/16/2024 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
07/17/2024 1749833 13 DoubleTree Lafayette 04/01/2020 8
07/17/2024 1648607 24 Hotel Indigo El Paso 07/01/2020 8
07/17/2024 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
06/17/2024 1749833 13 DoubleTree Lafayette 04/01/2020 8
06/17/2024 1648607 24 Hotel Indigo El Paso 07/01/2020 8
06/17/2024 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
05/17/2024 1749833 13 DoubleTree Lafayette 04/01/2020 8
05/17/2024 1648607 24 Hotel Indigo El Paso 07/01/2020 8
05/17/2024 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
04/17/2024 1749833 13 DoubleTree Lafayette 04/01/2020 8
04/17/2024 1648607 24 Hotel Indigo El Paso 07/01/2020 8
04/17/2024 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
03/15/2024 1749833 13 DoubleTree Lafayette 04/01/2020 8
03/15/2024 1648607 24 Hotel Indigo El Paso 07/01/2020 8
03/15/2024 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
02/16/2024 1749833 13 DoubleTree Lafayette 04/01/2020 8
02/16/2024 1648607 24 Hotel Indigo El Paso 07/01/2020 8
02/16/2024 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
01/18/2024 1749833 13 DoubleTree Lafayette 04/01/2020 8
01/18/2024 1648607 24 Hotel Indigo El Paso 07/01/2020 8
01/18/2024 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
12/15/2023 1749833 13 DoubleTree Lafayette 04/01/2020 8
12/15/2023 1648607 24 Hotel Indigo El Paso 07/01/2020 8
12/15/2023 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
Reports Available at sf.citidirect.com v. 21.09.28 Page 26 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
HISTORICAL LOAN MODIFICATION DETAIL
September 17, 2025
Distribution Modification Modification
Date Loan ID OMCR Property Name Date Code (4)
11/17/2023 1749833 13 DoubleTree Lafayette 04/01/2020 8
11/17/2023 1648607 24 Hotel Indigo El Paso 07/01/2020 8
11/17/2023 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
10/17/2023 1749833 13 DoubleTree Lafayette 04/01/2020 8
10/17/2023 1648607 24 Hotel Indigo El Paso 07/01/2020 8
10/17/2023 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
09/15/2023 1749833 13 DoubleTree Lafayette 04/01/2020 8
09/15/2023 1648607 24 Hotel Indigo El Paso 07/01/2020 8
09/15/2023 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
08/17/2023 1749833 13 DoubleTree Lafayette 04/01/2020 8
08/17/2023 1648607 24 Hotel Indigo El Paso 07/01/2020 8
08/17/2023 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
07/17/2023 1749833 13 DoubleTree Lafayette 04/01/2020 8
07/17/2023 1648607 24 Hotel Indigo El Paso 07/01/2020 8
07/17/2023 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
06/16/2023 1749833 13 DoubleTree Lafayette 04/01/2020 8
06/16/2023 1648607 24 Hotel Indigo El Paso 07/01/2020 8
06/16/2023 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
05/17/2023 1749833 13 DoubleTree Lafayette 04/01/2020 8
05/17/2023 1648607 24 Hotel Indigo El Paso 07/01/2020 8
05/17/2023 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
04/17/2023 1749833 13 DoubleTree Lafayette 04/01/2020 8
04/17/2023 1648607 24 Hotel Indigo El Paso 07/01/2020 8
04/17/2023 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
03/17/2023 1749833 13 DoubleTree Lafayette 04/01/2020 8
03/17/2023 1648607 24 Hotel Indigo El Paso 07/01/2020 8
03/17/2023 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
02/17/2023 1749833 13 DoubleTree Lafayette 04/01/2020 8
02/17/2023 1648607 24 Hotel Indigo El Paso 07/01/2020 8
02/17/2023 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
01/18/2023 1749833 13 DoubleTree Lafayette 04/01/2020 8
01/18/2023 1648607 24 Hotel Indigo El Paso 07/01/2020 8
01/18/2023 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
Reports Available at sf.citidirect.com v. 21.09.28 Page 27 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
HISTORICAL LOAN MODIFICATION DETAIL
September 17, 2025
Distribution Modification Modification
Date Loan ID OMCR Property Name Date Code (4)
12/16/2022 1749833 13 DoubleTree Lafayette 04/01/2020 8
12/16/2022 1648607 24 Hotel Indigo El Paso 07/01/2020 8
12/16/2022 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
11/18/2022 1749833 13 DoubleTree Lafayette 04/01/2020 8
11/18/2022 1648607 24 Hotel Indigo El Paso 07/01/2020 8
11/18/2022 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
10/17/2022 1749833 13 DoubleTree Lafayette 04/01/2020 8
10/17/2022 1648607 24 Hotel Indigo El Paso 07/01/2020 8
10/17/2022 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
09/16/2022 1749833 13 DoubleTree Lafayette 04/01/2020 8
09/16/2022 1648607 24 Hotel Indigo El Paso 07/01/2020 8
09/16/2022 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
08/17/2022 1749833 13 DoubleTree Lafayette 04/01/2020 8
08/17/2022 1648607 24 Hotel Indigo El Paso 07/01/2020 8
08/17/2022 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
07/15/2022 1749833 13 DoubleTree Lafayette 04/01/2020 8
07/15/2022 1648607 24 Hotel Indigo El Paso 07/01/2020 8
07/15/2022 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
06/17/2022 1749833 13 DoubleTree Lafayette 04/01/2020 8
06/17/2022 1648607 24 Hotel Indigo El Paso 07/01/2020 8
06/17/2022 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
05/17/2022 1749833 13 DoubleTree Lafayette 04/01/2020 8
05/17/2022 1648607 24 Hotel Indigo El Paso 07/01/2020 8
05/17/2022 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
04/15/2022 1749833 13 DoubleTree Lafayette 04/01/2020 8
04/15/2022 1648607 24 Hotel Indigo El Paso 07/01/2020 8
04/15/2022 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
03/17/2022 1749833 13 DoubleTree Lafayette 04/01/2020 8
03/17/2022 1648607 24 Hotel Indigo El Paso 07/01/2020 8
03/17/2022 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
02/17/2022 1749833 13 DoubleTree Lafayette 04/01/2020 8
02/17/2022 1648607 24 Hotel Indigo El Paso 07/01/2020 8
02/17/2022 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
Reports Available at sf.citidirect.com v. 21.09.28 Page 28 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
HISTORICAL LOAN MODIFICATION DETAIL
September 17, 2025
Distribution Modification Modification
Date Loan ID OMCR Property Name Date Code (4)
01/18/2022 1749833 13 DoubleTree Lafayette 04/01/2020 8
01/18/2022 1648607 24 Hotel Indigo El Paso 07/01/2020 8
01/18/2022 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
12/17/2021 1749833 13 DoubleTree Lafayette 04/01/2020 8
12/17/2021 1648607 24 Hotel Indigo El Paso 07/01/2020 8
12/17/2021 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
11/18/2021 1749833 13 DoubleTree Lafayette 04/01/2020 8
11/18/2021 1648607 24 Hotel Indigo El Paso 07/01/2020 8
11/18/2021 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
10/18/2021 1749833 13 DoubleTree Lafayette 04/01/2020 8
10/18/2021 1648607 24 Hotel Indigo El Paso 07/01/2020 8
10/18/2021 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
09/17/2021 1749833 13 DoubleTree Lafayette 04/01/2020 8
09/17/2021 1648607 24 Hotel Indigo El Paso 07/01/2020 8
09/17/2021 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
08/17/2021 1749833 13 DoubleTree Lafayette 04/01/2020 8
08/17/2021 1648607 24 Hotel Indigo El Paso 07/01/2020 8
08/17/2021 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
07/16/2021 1749833 13 DoubleTree Lafayette 04/01/2020 8
07/16/2021 1648607 24 Hotel Indigo El Paso 07/01/2020 8
07/16/2021 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
06/17/2021 1749833 13 DoubleTree Lafayette 04/01/2020 8
06/17/2021 1648607 24 Hotel Indigo El Paso 07/01/2020 8
06/17/2021 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
05/17/2021 1749833 13 DoubleTree Lafayette 04/01/2020 8
05/17/2021 1648607 24 Hotel Indigo El Paso 07/01/2020 8
05/17/2021 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
04/16/2021 1749833 13 DoubleTree Lafayette 04/01/2020 8
04/16/2021 1648607 24 Hotel Indigo El Paso 07/01/2020 8
04/16/2021 304101861 4 Old Town San Diego Hotel Portfolio 06/01/2020 8
03/17/2021 1749833 13 DoubleTree Lafayette 04/01/2020 8
03/17/2021 1648607 24 Hotel Indigo El Paso 07/01/2020 8
02/18/2021 1749833 13 DoubleTree Lafayette 04/01/2020 8
Reports Available at sf.citidirect.com v. 21.09.28 Page 29 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
HISTORICAL LOAN MODIFICATION DETAIL
September 17, 2025
Distribution Modification Modification
Date Loan ID OMCR Property Name Date Code (4)
02/18/2021 1648607 24 Hotel Indigo El Paso 07/01/2020 8
01/15/2021 1749833 13 DoubleTree Lafayette 04/01/2020 8
01/15/2021 1648607 24 Hotel Indigo El Paso 07/01/2020 8
12/17/2020 1749833 13 DoubleTree Lafayette 04/01/2020 8
11/18/2020 1749833 13 DoubleTree Lafayette 04/01/2020 8
10/19/2020 1749833 13 DoubleTree Lafayette 04/01/2020 8
09/17/2020 1749833 13 DoubleTree Lafayette 04/01/2020 8
08/17/2020 1749833 13 DoubleTree Lafayette 04/01/2020 8
Reports Available at sf.citidirect.com v. 21.09.28 Page 30 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
SPECIALLY SERVICED LOAN DETAIL
September 17, 2025
Special Servicing Ending Ending Most Most Recent Most Recent Most Recent
Workout Fee Amount Scheduled Actual Recent Valuation Special Servicer Master Servicer
Loan ID OMCR Strategy (3) Plus Adjustments Balance Balance Value Date Transfer Date Return Date
1647637 27 11 3,500.00 5,651,586.88 5,687,142.21 16,000,000.00 08/05/2025 09/20/2021
304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,100,000.00 01/14/2025 01/21/2020
Total Count = 2 7,000.00 14,422,032.99 15,089,129.44 22,100,000.00
Reports Available at sf.citidirect.com v. 21.09.28 Page 31 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1
HISTORICAL SPECIALLY SERVICED LOANS
September 17, 2025
Most Recent Most Recent
Servicer Master Servicer
Special Servicing Ending Ending Most Most Recent
Distribution Workout Fee Amount Scheduled Actual Recent Valuation Special
Date Loan ID OMCR Strategy (3) Plus Adjustments Balance Balance Value Date Transfer Date Return Date
09/17/2025 1647637 27 11 3,500.00 5,651,586.88 5,687,142.21 16,000,000.00 08/05/2025 09/20/2021
08/15/2025 1647637 27 11 3,500.00 5,687,142.21 5,687,142.21 16,200,000.00 09/17/2024 09/20/2021
07/17/2025 1647637 27 11 3,500.00 5,722,566.98 5,722,566.98 16,200,000.00 09/17/2024 09/20/2021
06/17/2025 1647637 27 11 3,500.00 5,758,543.78 5,784,409.65 16,200,000.00 09/17/2024 09/20/2021
05/16/2025 1647637 27 11 3,500.00 8,316,178.80 8,316,178.80 16,200,000.00 09/17/2024 09/20/2021
04/17/2025 1647637 27 11 3,500.00 8,342,937.93 8,422,646.39 16,200,000.00 09/17/2024 09/20/2021
03/17/2025 1647637 27 11 3,500.00 8,368,610.56 8,422,646.39 16,200,000.00 09/17/2024 09/20/2021
02/18/2025 1647637 27 11 3,500.00 8,397,172.91 8,422,646.39 16,200,000.00 09/17/2024 09/20/2021
01/17/2025 1647637 27 11 3,500.00 8,422,646.39 8,448,026.33 16,200,000.00 09/17/2024 09/20/2021
12/17/2024 1647637 27 11 3,500.00 8,448,026.33 8,474,316.88 16,200,000.00 09/17/2024 09/20/2021
11/18/2024 1647637 27 11 3,500.00 8,474,316.88 8,499,507.08 16,200,000.00 09/17/2024 09/20/2021
10/18/2024 1647637 27 11 3,500.00 8,499,507.08 8,499,507.08 16,400,000.00 10/24/2023 09/20/2021
09/17/2024 1647637 27 11 3,500.00 8,525,614.66 8,525,614.66 16,400,000.00 10/24/2023 09/20/2021
08/16/2024 1647637 27 11 3,500.00 8,550,616.50 8,550,616.50 16,400,000.00 10/24/2023 09/20/2021
07/17/2024 1647637 27 11 3,500.00 8,575,526.53 8,575,526.53 16,400,000.00 10/24/2023 09/20/2021
06/17/2024 1647637 27 11 3,500.00 8,601,363.94 8,626,087.62 16,400,000.00 10/24/2023 09/20/2021
05/17/2024 1647637 27 11 3,500.00 8,626,087.62 8,626,087.62 16,400,000.00 10/24/2023 09/20/2021
04/17/2024 1647637 27 11 3,500.00 8,651,745.34 8,676,284.02 16,400,000.00 10/24/2023 09/20/2021
03/15/2024 1647637 27 11 3,500.00 8,676,284.02 8,676,284.02 16,400,000.00 10/24/2023 09/20/2021
02/16/2024 1647637 27 11 3,500.00 8,702,794.33 8,702,794.33 16,400,000.00 10/24/2023 09/20/2021
01/18/2024 1647637 27 11 3,500.00 8,727,145.56 8,751,407.37 16,400,000.00 10/24/2023 09/20/2021
12/15/2023 1647637 27 11 3,500.00 8,751,407.37 8,776,619.70 16,400,000.00 10/24/2023 09/20/2021
11/17/2023 1647637 27 11 3,500.00 8,776,619.70 8,776,619.70 18,200,000.00 12/01/2022 09/20/2021
10/17/2023 1647637 27 11 3,500.00 8,800,699.84 8,825,736.99 18,200,000.00 12/01/2022 09/20/2021
09/15/2023 1647637 27 11 3,500.00 8,825,736.99 8,825,736.99 18,200,000.00 12/01/2022 09/20/2021
08/17/2023 1647637 27 11 3,500.00 8,849,636.77 8,849,636.77 18,200,000.00 12/01/2022 09/20/2021
07/17/2023 1647637 27 11 3,500.00 8,873,448.79 8,898,227.39 18,200,000.00 12/01/2022 09/20/2021
06/16/2023 1647637 27 11 3,500.00 8,898,227.39 8,898,227.39 18,200,000.00 12/01/2022 09/20/2021
05/17/2023 1647637 27 11 3,500.00 8,921,860.99 8,946,467.53 18,200,000.00 12/01/2022 09/20/2021
04/17/2023 1647637 27 11 3,500.00 8,946,467.53 8,946,467.53 18,200,000.00 12/01/2022 09/20/2021
03/17/2023 1647637 27 11 3,500.00 8,969,923.99 8,969,923.99 18,200,000.00 12/01/2022 09/20/2021
02/17/2023 1647637 27 11 3,500.00 8,996,491.28 8,996,491.28 18,200,000.00 12/01/2022 09/20/2021
Reports Available at sf.citidirect.com v. 21.09.28 Page 32 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1 September 17, 2025
HISTORICAL SPECIALLY SERVICED LOANS
Special Servicing Ending Ending Most Most Recent Most Recent Most Recent
Distribution Workout Fee Amount Scheduled Actual Recent Valuation Special Servicer Master Servicer
Date Loan ID OMCR Strategy (3) Plus Adjustments Balance Balance Value Date Transfer Date Return Date
01/18/2023 1647637 27 11 3,500.00 9,019,764.05 9,019,764.05 18,200,000.00 12/01/2022 09/20/2021
12/16/2022 1647637 27 11 3,500.00 9,042,951.36 9,042,951.36 18,200,000.00 12/01/2022 09/20/2021
11/18/2022 1647637 27 11 3,500.00 9,067,127.55 9,067,127.55 17,100,000.00 05/05/2017 09/20/2021
10/17/2022 1647637 27 11 3,500.00 9,090,140.94 9,090,140.94 17,100,000.00 05/05/2017 09/20/2021
09/16/2022 1647637 27 11 3,500.00 9,114,149.42 9,114,149.42 17,100,000.00 05/05/2017 09/20/2021
08/17/2022 1647637 27 11 3,500.00 9,136,990.15 9,159,747.00 17,100,000.00 05/05/2017 09/20/2021
07/15/2022 1647637 27 11 3,500.00 9,159,747.00 9,183,508.10 17,100,000.00 05/05/2017 09/20/2021
06/17/2022 1647637 27 11 3,500.00 9,183,508.10 9,183,508.10 17,100,000.00 05/05/2017 09/20/2021
05/17/2022 1647637 27 11 3,500.00 9,206,094.14 9,252,106.98 17,100,000.00 05/05/2017 09/20/2021
04/15/2022 1647637 27 11 3,500.00 9,229,690.52 9,252,106.98 17,100,000.00 05/05/2017 09/20/2021
03/17/2022 1647637 27 11 3,500.00 9,252,106.98 9,277,738.03 17,100,000.00 05/05/2017 09/20/2021
02/17/2022 1647637 27 13 3,500.00 9,277,738.03 9,299,978.05 17,100,000.00 05/05/2017 09/20/2021
01/18/2022 1647637 27 13 3,500.00 9,299,978.05 9,299,978.05 17,100,000.00 05/05/2017 09/20/2021
12/17/2021 1647637 27 13 3,500.00 9,322,136.41 9,322,136.41 17,100,000.00 05/05/2017 09/20/2021
11/18/2021 1647637 27 13 3,500.00 9,345,320.38 9,345,320.38 17,100,000.00 05/05/2017 09/20/2021
10/18/2021 1647637 27 13 3,500.00 9,367,312.24 9,367,312.24 17,100,000.00 05/05/2017 09/20/2021
03/17/2021 1648607 24 8 - 10,376,494.06 10,376,494.06 12,800,000.00 09/28/2020 08/10/2020 02/11/2021
02/18/2021 1648607 24 1 - 10,395,520.76 10,395,520.76 12,800,000.00 09/28/2020 08/10/2020
01/15/2021 1648607 24 1 - 10,410,402.46 10,425,223.98 12,800,000.00 09/28/2020 08/10/2020
12/17/2020 1648607 24 1 - 10,425,223.98 10,516,958.99 12,800,000.00 09/28/2020 08/10/2020
11/18/2020 1648607 24 1 - 10,441,347.57 10,531,349.63 20,700,000.00 02/01/2017 08/10/2020
10/19/2020 1648607 24 1 - 10,456,043.96 10,531,349.63 20,700,000.00 02/01/2017 08/10/2020
09/17/2020 1648607 24 13 - 10,472,046.92 10,531,349.63 20,700,000.00 02/01/2017 08/10/2020
08/17/2020 1648607 24 13 - 10,486,619.17 10,531,349.63 20,700,000.00 02/01/2017 08/10/2020
09/17/2025 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,100,000.00 01/14/2025 01/21/2020
08/15/2025 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,100,000.00 01/14/2025 01/21/2020
07/17/2025 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,100,000.00 01/14/2025 01/21/2020
06/17/2025 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,100,000.00 01/14/2025 01/21/2020
05/16/2025 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,100,000.00 01/14/2025 01/21/2020
04/17/2025 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,100,000.00 01/14/2025 01/21/2020
03/17/2025 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,100,000.00 01/14/2025 01/21/2020
02/18/2025 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,100,000.00 01/14/2025 01/21/2020
Reports Available at sf.citidirect.com v. 21.09.28 Page 33 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1 September 17, 2025
HISTORICAL SPECIALLY SERVICED LOANS
Special Servicing Ending Ending Most Most Recent Most Recent Most Recent
Distribution Workout Fee Amount Scheduled Actual Recent Valuation Special Servicer Master Servicer
Date Loan ID OMCR Strategy (3) Plus Adjustments Balance Balance Value Date Transfer Date Return Date
01/17/2025 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,300,000.00 12/11/2023 01/21/2020
12/17/2024 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,300,000.00 12/11/2023 01/21/2020
11/18/2024 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,300,000.00 12/11/2023 01/21/2020
10/18/2024 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,300,000.00 12/11/2023 01/21/2020
09/17/2024 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,300,000.00 12/11/2023 01/21/2020
08/16/2024 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,300,000.00 12/11/2023 01/21/2020
07/17/2024 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,300,000.00 12/11/2023 01/21/2020
06/17/2024 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,300,000.00 12/11/2023 01/21/2020
05/17/2024 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,300,000.00 12/11/2023 01/21/2020
04/17/2024 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,300,000.00 12/11/2023 01/21/2020
03/15/2024 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,300,000.00 12/11/2023 01/21/2020
02/16/2024 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 6,300,000.00 12/11/2023 01/21/2020
01/18/2024 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 7,090,000.00 12/28/2022 01/21/2020
12/15/2023 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 7,090,000.00 12/28/2022 01/21/2020
11/17/2023 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 7,090,000.00 12/28/2022 01/21/2020
10/17/2023 304101859 30 2 3,500.00 8,770,446.11 9,401,987.23 7,090,000.00 12/28/2022 01/21/2020
09/15/2023 304101859 30 2 3,500.00 8,786,300.63 9,401,987.23 7,090,000.00 12/28/2022 01/21/2020
08/17/2023 304101859 30 2 3,500.00 8,800,895.09 9,401,987.23 7,090,000.00 12/28/2022 01/21/2020
07/17/2023 304101859 30 2 3,500.00 8,815,428.10 9,401,987.23 7,090,000.00 12/28/2022 01/21/2020
06/16/2023 304101859 30 2 3,500.00 8,831,099.32 9,401,987.23 7,090,000.00 12/28/2022 01/21/2020
05/17/2023 304101859 30 2 3,500.00 8,845,505.16 9,401,987.23 7,090,000.00 12/28/2022 01/21/2020
04/17/2023 304101859 30 2 3,500.00 8,861,053.81 9,401,987.23 7,090,000.00 12/28/2022 01/21/2020
03/17/2023 304101859 30 2 3,500.00 8,875,333.54 9,401,987.23 7,090,000.00 12/28/2022 01/21/2020
02/17/2023 304101859 30 2 3,500.00 8,893,176.62 9,401,987.23 7,090,000.00 12/28/2022 01/21/2020
01/18/2023 304101859 30 2 3,500.00 8,907,321.10 9,401,987.23 7,450,000.00 12/19/2021 01/21/2020
12/16/2022 304101859 30 2 3,500.00 8,921,406.03 9,401,987.23 7,450,000.00 12/19/2021 01/21/2020
11/18/2022 304101859 30 2 3,500.00 8,936,645.39 9,401,987.23 7,450,000.00 12/19/2021 01/21/2020
10/17/2022 304101859 30 2 3,500.00 8,950,606.86 9,401,987.23 7,450,000.00 12/19/2021 01/21/2020
09/16/2022 304101859 30 2 3,500.00 8,965,727.22 9,401,987.23 7,450,000.00 12/19/2021 01/21/2020
08/17/2022 304101859 30 2 3,500.00 8,979,566.25 9,401,987.23 7,450,000.00 12/19/2021 01/21/2020
07/15/2022 304101859 30 2 3,500.00 8,993,347.01 9,401,987.23 7,450,000.00 12/19/2021 01/21/2020
06/17/2022 304101859 30 2 3,500.00 9,008,293.21 9,401,987.23 7,450,000.00 12/19/2021 01/21/2020
Reports Available at sf.citidirect.com v. 21.09.28 Page 34 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1 September 17, 2025
HISTORICAL SPECIALLY SERVICED LOANS
Special Servicing Ending Ending Most Most Recent Most Recent Most Recent
Distribution Workout Fee Amount Scheduled Actual Recent Valuation Special Servicer Master Servicer
Date Loan ID OMCR Strategy (3) Plus Adjustments Balance Balance Value Date Transfer Date Return Date
05/17/2022 304101859 30 2 3,500.00 9,021,953.02 9,401,987.23 7,450,000.00 12/19/2021 01/21/2020
04/15/2022 304101859 30 2 3,500.00 9,036,782.65 9,401,987.23 7,450,000.00 12/19/2021 01/21/2020
03/17/2022 304101859 30 2 3,500.00 9,050,322.51 9,401,987.23 7,450,000.00 12/19/2021 01/21/2020
02/17/2022 304101859 30 2 3,500.00 9,067,499.87 9,401,987.23 7,450,000.00 12/19/2021 01/21/2020
01/18/2022 304101859 30 2 3,500.00 9,080,910.41 9,401,987.23 8,330,000.00 01/14/2021 01/21/2020
12/17/2021 304101859 30 2 3,500.00 9,094,264.48 9,401,987.23 8,330,000.00 01/14/2021 01/21/2020
11/18/2021 304101859 30 2 3,500.00 9,108,799.44 9,413,989.49 8,330,000.00 01/14/2021 01/21/2020
10/18/2021 304101859 30 2 3,500.00 9,122,036.09 9,413,989.49 8,330,000.00 01/14/2021 01/21/2020
09/17/2021 304101859 30 2 3,500.00 9,136,457.88 9,413,989.49 8,330,000.00 01/14/2021 01/21/2020
08/17/2021 304101859 30 2 3,500.00 9,149,578.09 9,413,989.49 8,330,000.00 01/14/2021 01/21/2020
07/16/2021 304101859 30 2 3,500.00 9,162,643.06 9,413,989.49 8,330,000.00 01/14/2021 01/21/2020
06/17/2021 304101859 30 2 3,500.00 9,176,899.38 9,413,989.49 8,330,000.00 01/14/2021 01/21/2020
05/17/2021 304101859 30 2 3,500.00 9,189,849.32 9,413,989.49 8,330,000.00 01/14/2021 01/21/2020
04/16/2021 304101859 30 2 3,500.00 9,203,994.77 9,413,989.49 8,330,000.00 01/14/2021 01/21/2020
03/17/2021 304101859 30 2 3,500.00 9,216,830.63 9,413,989.49 8,330,000.00 01/14/2021 01/21/2020
02/18/2021 304101859 30 2 3,500.00 9,233,374.53 9,413,989.49 8,500,000.00 02/29/2020 01/21/2020
01/15/2021 304101859 30 2 3,500.00 9,246,086.69 9,413,989.49 8,500,000.00 02/29/2020 01/21/2020
12/17/2020 304101859 30 2 3,500.00 9,258,745.33 9,413,989.49 8,500,000.00 02/29/2020 01/21/2020
11/18/2020 304101859 30 2 3,500.00 9,272,610.03 9,413,989.49 8,500,000.00 02/29/2020 01/21/2020
10/19/2020 304101859 30 2 3,500.00 9,285,157.00 9,413,989.49 8,500,000.00 02/29/2020 01/21/2020
09/17/2020 304101859 30 2 3,500.00 9,298,914.07 9,413,989.49 8,500,000.00 02/29/2020 01/21/2020
08/17/2020 304101859 30 2 3,500.00 9,311,350.29 9,413,989.49 8,500,000.00 02/29/2020 01/21/2020
07/17/2020 304101859 30 2 3,500.00 9,323,734.15 9,413,989.49 8,500,000.00 02/29/2020 01/21/2020
06/17/2020 304101859 30 2 3,500.00 9,337,334.02 9,413,989.49 8,500,000.00 02/29/2020 01/21/2020
05/15/2020 304101859 30 2 3,500.00 9,349,608.49 9,413,989.49 8,500,000.00 02/29/2020 01/21/2020
04/17/2020 304101859 30 13 3,500.00 9,363,102.92 9,413,989.49 8,500,000.00 02/29/2020 01/21/2020
03/17/2020 304101859 30 13 3,500.00 9,375,268.89 9,413,989.49 13,900,000.00 02/15/2017 01/21/2020
02/18/2020 304101859 30 13 3,500.00 9,389,934.22 9,439,117.59 13,900,000.00 02/15/2017 01/21/2020
05/17/2021 304101861 4 8 5,441.48 52,142,057.56 52,142,057.56 65,600,000.00 10/29/2020 08/19/2020 04/21/2021
04/16/2021 304101861 4 1 (72,815.41 ) 52,238,198.79 52,327,266.50 82,000,000.00 07/06/2017 08/19/2020
03/17/2021 304101861 4 1 10,195.91 52,327,266.50 53,238,204.74 82,000,000.00 07/06/2017 08/19/2020
02/18/2021 304101861 4 13 11,307.34 52,436,131.77 53,238,204.74 82,000,000.00 07/06/2017 08/19/2020
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1 September 17, 2025
HISTORICAL SPECIALLY SERVICED LOANS
Special Servicing Ending Ending Most Most Recent Most Recent Most Recent
Distribution Workout Fee Amount Scheduled Actual Recent Valuation Special Servicer Master Servicer
Date Loan ID OMCR Strategy (3) Plus Adjustments Balance Balance Value Date Transfer Date Return Date
01/15/2021 304101861 4 13 11,326.27 52,524,413.46 53,238,204.74 82,000,000.00 07/06/2017 08/19/2020
12/17/2020 304101861 4 13 10,980.56 52,612,344.58 53,238,204.74 82,000,000.00 07/06/2017 08/19/2020
11/18/2020 304101861 4 13 11,365.35 52,706,678.26 53,238,204.74 82,000,000.00 07/06/2017 08/19/2020
10/19/2020 304101861 4 13 11,018.23 52,793,885.58 53,238,204.74 82,000,000.00 07/06/2017 08/19/2020
09/17/2020 304101861 4 13 6,621.75 52,887,521.50 53,238,204.74 82,000,000.00 07/06/2017 08/19/2020
05/15/2020 307971614 23 8 - 11,908,830.85 11,908,830.85 55,750,000.00 04/07/2017 04/17/2020
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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1 September 17, 2025
UNSCHEDULED PRINCIPAL DETAIL
Liquidation / Liquid / Prepay Principal Principal Prepayment Interest Prepayment Yield Maintenance
Loan ID OMCR Prepayment Date Code (5) Collections Adjustments Excess / (Shortfall) Penalties (PPP) Penalties (YM)
No Loans with Unscheduled Principal Activity to Report.
Reports Available at sf.citidirect.com v. 21.09.28 Page 37 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1 September 17, 2025
HISTORICAL UNSCHEDULED PRINCIPAL DETAIL
Distribution Liquidation / Liquid / Prepay Principal Principal Prepayment Interest Prepayment Yield Maintenance
Date Loan ID OMCR Prepayment Date Code (5) Collections Adjustments Excess / (Shortfall) Penalties (PPP) Penalties (YM)
6/17/2025 1647637 27 06/01/2025 1 2,531,769.15 - - - -
4/17/2025 308511028 28 04/11/2025 2 8,807,720.12 - - - -
7/17/2023 300801627 44 06/28/2023 9 4,540,137.60 - - - 45,473.64
6/17/2022 307971614 23 06/03/2022 5 11,446,234.79 - - - -
5/17/2022 304101836 6 05/03/2022 2 42,000,000.00 - - - -
9/17/2019 1749084 22 08/01/2018 11 3,156,779.24 - - - 254,846.27
Reports Available at sf.citidirect.com v. 21.09.28 Page 38 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1 September 17, 2025
LIQUIDATED LOAN DETAIL
Beginning Most Liquidation Net Net Realized Date of Loss with
Scheduled Recent Sales Proceeds Liquidation Proceeds Loss to Current Current Cumulative Cumulative
Loan ID OMCR Balance Value Price Received Expense Available Trust Adj. to Loan Adj. to Loan Adj. to Loan Adj. to Trust
No Loans liquidated to Report.
Reports Available at sf.citidirect.com v. 21.09.28 Page 39 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1 September 17, 2025
HISTORICAL LIQUIDATED LOAN
Beginning Most Liquidation Net Net Realized Date of Loss with
Distribution Scheduled Recent Sales Proceeds Liquidation Proceeds Loss to Current Current Cumulative Cumulative
Date Loan ID OMCR Balance Value Price Received Expense Available Trust Adj. to Loan Adj. to Loan Adj. to Loan Adj. to Trust
No Loans liquidated to Report.
Reports Available at sf.citidirect.com v. 21.09.28 Page 40 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1 September 17, 2025
CREFC® INVESTOR REPORTING PACKAGE LEGENDS
1|CREFC Investor Reporting Package Legends
Property Type (1) Workout Strategy (3) Liquidation/Prepayment Code (5)
MF Multifamily 1 Modification 1 Partial Liquidation (Curtailment)
RT Retail 2 Foreclosure 2 Payoff Prior To Maturity
HC HealthCare 3 Bankruptcy 3 Disposition / Liquidation
IN Industrial 4 Extension 4 Repurchase / Substitution
MH Mobile Home Park 5 Note Sale 5 Full Payoff At Maturity
OF Office 6 DPO 6 DPO
MU Mixed Use 7 REO 7 Liquidation prior to 7/1/2006
LO Lodging 8 Resolved 8 Payoff With Penalty
SS Self Storage 9 Pending Return to Master Servicer 9 Payoff With Yield Maintenance
SE Securities 10 Deed In Lieu of Foreclosure 10 Curtailment With Penalty
CH Cooperative Housing 11 Full Payoff 11 Curtailment With Yield Maintenance
ZZ Missing Information 12 Reps and Warranties
SF SF 13 TBD
WH Warehouse 98 Other
OT Other
Modification Code (4)
Payment Status of Loan (2)
1 Maturity Date Extension
A In Grace Period 2 Amortization Change
B Late, but less than 30 Days 3 Principal Write-Off
0 Current 4 Blank (formerly Combination)
1 30-59 Days Delinquent 5 Temporary Rate Reduction
2 60-89 Days Delinquent 6 Capitalization of Interest
3 90-120 Days Delinquent 7 Capitalization of Taxes
4 Performing Matured Balloon 8 Other
5 Non Performing Matured Balloon 9 Combination
6 121+ Days Delinquent 10 Forbearance
Reports Available at sf.citidirect.com v. 21.09.28 Page 41 of 42 © Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1 September 17, 2025
NOTES
No Notes available for this deal at this time.
Reports Available at sf.citidirect.com v. 21.09.28 Page 42 of 42 © Copyright 2025 Citigroup
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