21 CLAREMONT AVENUE is a prewar 1910 building, 10 floors, 47 units in Harlem, NYC. Owned by TRUSTEES OF COLUMBIA UNIVERSITY. Public records show 16 open violations, 8 311 complaints on file. Risk signals: 1 bedbug report.
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Manhattan · March 2026
Best & worst months to sign a lease
Potential savings: ~8% by timing your move to November.
Asking rent per bedroom type — switch tabs to see each with effective (concession-net) rent.
Monthly counts over the last 7 years · all data sources
(A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS.
(A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS.
Portfolio-level grade reflects the landlord's buildings across NYC, weighted by unit count. Individual building grades may differ.
View full landlord profileTop 5 by score · of 181 total
ACRIS deeds and regulatory filings
West Harlem around 125th Street is the neighborhood's commercial and cultural spine — the Apollo Theater, Studio Museum, and a corridor of new development coexist with decades-old barbershops and West African restaurants. Columbia's Manhattanville campus expansion is reshaping the western edge.
Noise — Noise: Manufacturing Noise (NK1)
Noise — Noise: Construction Equipment (NC1)
Missed Collection — Trash
OUTSIDE BUILDING — PORCH/BALCONY
HPD Class A Violation — (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR
Noise — Noise: Construction Equipment (NC1)
Request Large Bulky Item Collection
HPD Class A Violation — (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR
Request Large Bulky Item Collection
Elevator — Elevator - Single Device On Property/No Alternate Service