Questions about this building
Does 315 West 121 Street, Manhattan have open violations?
Yes. 315 West 121 Street, Manhattan had 72 open violations on September 26, 2026: 72 from HPD. 16 are Class C, the class HPD treats as immediately hazardous.
Is 315 West 121 Street, Manhattan getting better or worse?
Certifications are being filed faster than new violations come in. 8 certifications filed against 3 new Class C in the last 180 days. That window ends September 26, 2026. It compares certifications filed with new Class C violations, and it describes what happened, not what anyone intends.
When were certifications filed on Class C violations at 315 West 121 Street, Manhattan?
Since September 28, 2023, a certification was filed on 1 Class C violation, by the original certify-by date. A certification is the filing, dated when it was made, not HPD's acceptance of it. It is compared with the original certify-by date on the notice. A granted postponement moves that date and the city's data keeps only the first, so a certification counted after it may still have met a postponed date.
Does 315 West 121 Street, Manhattan have active DOB violations?
Yes. 1 active DOB violation, issued June 30, 2023. The Department of Buildings writes these separately from HPD's housing violations, for things like boilers, elevators, facades, construction and energy filings. Each one stays active until DOB resolves or dismisses it.
Has DOB received complaints about 315 West 121 Street, Manhattan?
Yes. 1 DOB complaint in the last 12 months. It was filed October 15, 2025. Anyone can complain to DOB about a building or the work going on in it, and DOB then inspects and decides whether there is a violation. A conversion complaint says an apartment may have been added or changed without approval. It is a complaint, not a finding.
Does 315 West 121 Street, Manhattan have a certificate of occupancy?
Its latest certificate of occupancy is a final one, issued September 18, 2012. A certificate of occupancy says how a building may be used and occupied. A temporary one lets people move in while work finishes and has to be renewed until DOB issues the final one. DOB's records here start in July 2012, so an older certificate may not show.
Is 315 West 121 Street, Manhattan rent stabilized?
The building has rent-stabilized apartments on its 2024 registration. That comes from the Rent Guidelines Board's list of buildings with at least one stabilized apartment registered that year. Buildings that registered late are left off, and a 421-a or J-51 building can leave stabilization when its tax benefit ends. A particular apartment's status is for NYS HCR to say.
When was 315 West 121 Street, Manhattan built?
The city's record gives 1915 as the year 315 West 121 Street, Manhattan was built, in the Department of City Planning's PLUTO tax-lot file. The same file classes it as a walk-up apartment building with 5 floors.
How many apartments does 315 West 121 Street, Manhattan have?
The Department of City Planning's PLUTO tax-lot file lists 20 residential units at 315 West 121 Street, Manhattan. The count is for the whole tax lot.
Where do these numbers come from?
From New York City's own data: HPD housing violations and OATH/ECB hearing results, read whole rather than sampled. It also draws on DOB violations, DOB complaints, the Rent Guidelines Board's stabilized-building lists, DOB certificates of occupancy and the city's PLUTO tax-lot file. This page is current through September 26, 2026. The city's data changes daily, so a violation certified after that can still show as open here; the city's own page for this building is linked above.
Cite this page
ViolationScout, 315 West 121st St, Manhattan: violations, from New York City's HPD violation and OATH/ECB hearing data. Figures through September 26, 2026. https://violationscout.com/building/315-west-121-street-manhattan
How we count: /method.
