EX-31
Rule 13a-14(d)/15d-14(d) Certifications.





I,
Helaine M. Kaplan, certify that:



1. I
have reviewed this report on Form 10-K and all reports on Form 10-D required to
be filed in respect of the period covered by this report on Form 10-K of the
Benchmark 2018-B1 Mortgage Trust (the "Exchange Act periodic
reports");



2.
Based on my knowledge, the Exchange Act periodic reports, taken as a whole, do
not contain any untrue statement of a material fact or omit to state a material
fact necessary to make the statements made, in light of the circumstances under
which such statements were made, not misleading with respect to the period
covered by this report;



3.
Based on my knowledge, all of the distribution, servicing and other information
required to be provided under Form 10-D for the period covered by this report
is included in the Exchange Act periodic reports;



4.
Based on my knowledge and the servicer compliance statements required in this
report under Item 1123 of Regulation AB, and except as disclosed in the
Exchange Act periodic reports, the servicers have fulfilled their obligations
under the servicing agreements in all material respects; and



5. All
of the reports on assessment of compliance with servicing criteria for
asset-backed securities and their related attestation reports on assessment of
compliance with servicing criteria for asset-backed securities required to be
included in this report in accordance with Item 1122 of Regulation AB and
Exchange Act Rules 13a-18 and 15d-18 have been included as an exhibit to this
report, except as otherwise disclosed in this report. Any material instances of
noncompliance described in such reports have been disclosed in this report on
Form 10-K.



In
giving the certifications above, I have reasonably relied on information
provided to me by the following unaffiliated parties:



Wells
Fargo Bank, National Association, as Master Servicer, LNR Partners, LLC, as
Special Servicer, Wilmington Trust, National Association, as Trustee, Wells
Fargo Bank, National Association, as Certificate Administrator, Wells Fargo
Bank, National Association, as Custodian, Park Bridge Lender Services LLC, as
Operating Advisor, CoreLogic Solutions, LLC, as Servicing Function Participant,
Computershare Trust Company, National Association, as Servicing Function
Participant for the Certificate Administrator, Computershare Trust Company,
National Association, as Servicing Function Participant for the Custodian,
Midland Loan Services, a Division of PNC Bank, National Association, as Primary
Servicer for the Gateway Net Lease Portfolio Mortgage Loan, Midland Loan
Services, a Division of PNC Bank, National Association, as Special Servicer for
the Gateway Net Lease Portfolio Mortgage Loan, Wells Fargo Bank, National
Association, as Trustee for the Gateway Net Lease Portfolio Mortgage Loan,
Wells Fargo Bank, National Association, as Custodian for the Gateway Net Lease
Portfolio Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for
the Gateway Net Lease Portfolio Mortgage Loan, Computershare Trust Company,
National Association, as Servicing Function Participant for the Custodian for
the Gateway Net Lease Portfolio Mortgage Loan, Midland Loan Services, a Division
of PNC Bank, National Association, as Primary Servicer for the Starwood Capital
Group Hotel Portfolio Mortgage Loan, Midland Loan Services, a Division of PNC
Bank, National Association, as Special Servicer for the Starwood Capital Group
Hotel Portfolio Mortgage Loan prior to May 5, 2023, K-Star Asset Management
LLC, as Special Servicer for the Starwood Capital Group Hotel Portfolio
Mortgage Loan on and after May 5, 2023, Wells Fargo Bank, National Association,
as Trustee for the Starwood Capital Group Hotel Portfolio Mortgage Loan, Wells
Fargo Bank, National Association, as Custodian for the Starwood Capital Group
Hotel Portfolio Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor
for the Starwood Capital Group Hotel Portfolio Mortgage Loan, Computershare
Trust Company, National Association, as Servicing Function Participant for the
Custodian for the Starwood Capital Group Hotel Portfolio Mortgage Loan, Midland
Loan Services, a Division of PNC Bank, National Association, as Primary Servicer
for the Station Place III Mortgage Loan, Midland Loan Services, a Division of
PNC Bank, National Association, as Special Servicer for the Station Place III
Mortgage Loan prior to May 10, 2023, K-Star Asset Management LLC, as Special
Servicer for the Station Place III Mortgage Loan on and after May 10, 2023,
Wells Fargo Bank, National Association, as Trustee for the Station Place III
Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for the
Station Place III Mortgage Loan, Pentalpha Surveillance LLC, as Operating
Advisor for the Station Place III Mortgage Loan, Computershare Trust Company,
National Association, as Servicing Function Participant for the Custodian for
the Station Place III Mortgage Loan, Midland Loan Services, a Division of PNC
Bank, National Association, as Primary Servicer for the AHIP Northeast
Portfolio I Mortgage Loan, Midland Loan Services, a Division of PNC Bank,
National Association, as Special Servicer for the AHIP Northeast Portfolio I
Mortgage Loan prior to May 10, 2023, K-Star Asset Management LLC, as Special
Servicer for the AHIP Northeast Portfolio I Mortgage Loan on and after May 10,
2023, Wells Fargo Bank, National Association, as Trustee for the AHIP Northeast
Portfolio I Mortgage Loan, Wells Fargo Bank, National Association, as Custodian
for the AHIP Northeast Portfolio I Mortgage Loan, Pentalpha Surveillance LLC,
as Operating Advisor for the AHIP Northeast Portfolio I Mortgage Loan,
Computershare Trust Company, National Association, as Servicing Function Participant
for the Custodian for the AHIP Northeast Portfolio I Mortgage Loan, Midland
Loan Services, a Division of PNC Bank, National Association, as Primary
Servicer for the 521-523 East 72nd Street Mortgage Loan, Midland Loan Services,
a Division of PNC Bank, National Association, as Special Servicer for the
521-523 East 72nd Street Mortgage Loan prior to May 10, 2023, K-Star Asset
Management LLC, as Special Servicer for the 521-523 East 72nd Street Mortgage
Loan on and after May 10, 2023, Wells Fargo Bank, National Association, as
Trustee for the 521-523 East 72nd Street Mortgage Loan, Wells Fargo Bank,
National Association, as Custodian for the 521-523 East 72nd Street Mortgage
Loan, Pentalpha Surveillance LLC, as Operating Advisor for the 521-523 East 72nd
Street Mortgage Loan, Computershare Trust Company, National Association, as
Servicing Function Participant for the Custodian for the 521-523 East 72nd
Street Mortgage Loan, Wells Fargo Bank, National Association, as Primary
Servicer for the Worldwide Plaza Mortgage Loan, Situs Holdings, LLC, successor
to Cohen Financial, a Division of Truist Bank, successor by merger to SunTrust
Bank, as Special Servicer for the Worldwide Plaza Mortgage Loan, Wilmington
Trust, National Association, as Trustee for the Worldwide Plaza Mortgage Loan,
Wells Fargo Bank, National Association, as Custodian for the Worldwide Plaza
Mortgage Loan, Park Bridge Lender Services LLC, as Operating Advisor for the
Worldwide Plaza Mortgage Loan, CoreLogic Solutions, LLC, as Servicing Function
Participant for the Worldwide Plaza Mortgage Loan, Computershare Trust Company,
National Association, as Servicing Function Participant for the Custodian for
the Worldwide Plaza Mortgage Loan, KeyBank National Association, as Primary
Servicer for the Miracle Mile Shopping Center Mortgage Loan, LNR Partners, LLC,
as Special Servicer for the Miracle Mile Shopping Center Mortgage Loan, Wells
Fargo Bank, National Association, as Trustee for the Miracle Mile Shopping
Center Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for
the Miracle Mile Shopping Center Mortgage Loan, Park Bridge Lender Services
LLC, as Operating Advisor for the Miracle Mile Shopping Center Mortgage Loan,
Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the Miracle Mile Shopping Center Mortgage
Loan, KeyBank National Association, as Primary Servicer for the Towers at
University Town Center Mortgage Loan, CWCapital Asset Management LLC, as
Special Servicer for the Towers at University Town Center Mortgage Loan, Wells
Fargo Bank, National Association, as Trustee for the Towers at University Town
Center Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for
the Towers at University Town Center Mortgage Loan, Pentalpha Surveillance LLC,
as Operating Advisor for the Towers at University Town Center Mortgage Loan,
Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the Towers at University Town Center Mortgage
Loan, KeyBank National Association, as Primary Servicer for the Rochester Hotel
Portfolio Mortgage Loan, CWCapital Asset Management LLC, as Special Servicer
for the Rochester Hotel Portfolio Mortgage Loan, Wells Fargo Bank, National
Association, as Trustee for the Rochester Hotel Portfolio Mortgage Loan, Wells
Fargo Bank, National Association, as Custodian for the Rochester Hotel
Portfolio Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for
the Rochester Hotel Portfolio Mortgage Loan, Computershare Trust Company,
National Association, as Servicing Function Participant for the Custodian for
the Rochester Hotel Portfolio Mortgage Loan, Midland Loan Services, a Division
of PNC Bank, National Association, as Primary Servicer for the Two Harbor Point
Square Mortgage Loan, LNR Partners, LLC, as Special Servicer for the Two Harbor
Point Square Mortgage Loan, Wilmington Trust, National Association, as Trustee
for the Two Harbor Point Square Mortgage Loan, Citibank, N.A., as Custodian for
the Two Harbor Point Square Mortgage Loan, Park Bridge Lender Services LLC, as
Operating Advisor for the Two Harbor Point Square Mortgage Loan, U.S. Bank
National Association, as Servicing Function Participant for the Two Harbor
Point Square Mortgage Loan, Midland Loan Services, a Division of PNC Bank,
National Association, as Primary Servicer for the Atrium Center Mortgage Loan,
Midland Loan Services, a Division of PNC Bank, National Association, as Special
Servicer for the Atrium Center Mortgage Loan prior to May 10, 2023, K-Star
Asset Management LLC, as Special Servicer for the Atrium Center Mortgage Loan
on and after May 10, 2023, Wilmington Trust, National Association, as Trustee
for the Atrium Center Mortgage Loan, Citibank, N.A., as Custodian for the Atrium
Center Mortgage Loan, Park Bridge Lender Services LLC, as Operating Advisor for
the Atrium Center Mortgage Loan, U.S. Bank National Association, as Servicing
Function Participant for the Atrium Center Mortgage Loan, Midland Loan
Services, a Division of PNC Bank, National Association, as Primary Servicer for
the Marriott Charlotte City Center Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Special Servicer for the
Marriott Charlotte City Center Mortgage Loanprior to May 10, 2023,
K-Star Asset Management LLC, as Special Servicer for the Marriott Charlotte
City Center Mortgage Loan on and after May 10, 2023, Wilmington Trust, National
Association, as Trustee for the Marriott Charlotte City Center Mortgage Loan,
Citibank, N.A., as Custodian for the Marriott Charlotte City Center Mortgage
Loan, Park Bridge Lender Services LLC, as Operating Advisor for the Marriott
Charlotte City Center Mortgage Loan, and U.S. Bank National Association, as
Servicing Function Participant for the Marriott Charlotte City Center Mortgage
Loan.





Dated:
March 15, 2024





/s/
Helaine M. Kaplan

Helaine
M. Kaplan

President

(senior
officer in charge of securitization of the depositor)