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ViolationScout13 new Class C against 0 certifications filed in the last 180 days.Is this your building?
Buildings344 West 121 Street, ManhattanCurrent through

344 West 121st St, Manhattan

BBL 1-01947-0154

En español: 28 violaciones de Clase C abiertas (peligro inmediato) y 49 abiertas en total. La más antigua del HPD lleva 18 años abierta, desde el 2 de diciembre de 2007.

New violations are coming in faster than certifications are filed. 13 new Class C against 0 certifications filed in the last 180 days.

The oldest open HPD violation has been open 18 years, since December 2, 2007.

Since September 29, 2023, certifications were filed on 2 Class C violations, all 2 after the original certify-by date. How certification works

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28 open Class C. The oldest open HPD violation was filed December 2, 2007.

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The case file on a building like this names who is responsible on HPD's registration and how to reach them. We prepare them for firms on our pilot, ranked by how much hazardous work is open.

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The building report reads this record for you: every open violation in the city's own words, what each status means, and how the building compares with others its size. Usually ready within 15 minutes of payment.

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HPD takes complaints from tenants through 311.

DOB violations
9 active DOB violations, most of them for low-pressure boilers. The newest was issued November 14, 2025.
DOB complaints
1 DOB complaint in the 12 months to September 25, 2026. It was filed April 24, 2026.

Open violations by class. A party is named only where the building's HPD registration covers the date a violation was filed.

FiledCategoryStatusNumberRegistered party when filed
Class C28 open most often Heat / Hot Water
Notice sent19184340
Vermin / InfestationNotice sent to tenant19184335
Vermin / InfestationNotice sent to tenant19184334
Heat / Hot WaterNotice sent18996295Nextreo, LLC
Heat / Hot WaterNotice sent18811157Nextreo, LLC
Notice sent18811154Nextreo, LLC
Heat / Hot WaterNotice sent18811149Nextreo, LLC
Notice sent18811148Nextreo, LLC
Heat / Hot WaterNo access to reinspect (first try)18751720Nextreo, LLC
Vermin / InfestationNo access to reinspect (first try)18751719Nextreo, LLC
The report lists all 28, each with the city's own words and the date on its notice. What the report adds
Class B20 open most often Fire Safety
Heat / Hot WaterNotice sent19184336
Fire SafetyNotice sent19184333
Fire SafetyNotice sent19184332
Fire SafetyNotice sent18940706Nextreo, LLC
Fire SafetyNotice sent18811152Nextreo, LLC
Fire SafetyNotice sent18811151Nextreo, LLC
Fire SafetyNotice sent18811150Nextreo, LLC
Not complied with18751722Nextreo, LLC
Fire SafetyNo access to reinspect (first try)18751717Nextreo, LLC
Fire SafetyNo access to reinspect (first try)18751716Nextreo, LLC
The report lists all 20, each with the city's own words and the date on its notice. What the report adds
OATH/ECB1 open
Construction, Class 2Decided by default39186518XNextreo, LLC

The full report on 344 West 121st St, Manhattan

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Questions about this building

Does 344 West 121 Street, Manhattan have open violations?

Yes. 344 West 121 Street, Manhattan had 49 open violations on September 27, 2026: 48 from HPD and 1 from OATH/ECB. 28 are Class C, the class HPD treats as immediately hazardous. The oldest open HPD violation has been open 18 years, since December 2, 2007.

Is 344 West 121 Street, Manhattan getting better or worse?

New violations are coming in faster than certifications are filed. 13 new Class C against 0 certifications filed in the last 180 days. That window ends September 27, 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 344 West 121 Street, Manhattan?

Since September 29, 2023, certifications were filed on 2 Class C violations, all 2 after 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 344 West 121 Street, Manhattan have active DOB violations?

Yes. 9 active DOB violations, most of them for low-pressure boilers. The newest was issued November 14, 2025. 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 344 West 121 Street, Manhattan?

Yes. 1 DOB complaint in the 12 months to September 25, 2026. It was filed April 24, 2026. 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.

When was 344 West 121 Street, Manhattan built?

The city's record gives 1899 as the year 344 West 121 Street, Manhattan was built, in the Department of City Planning's PLUTO tax-lot file. The same file classes it as a two-family dwelling with 3 floors.

How many apartments does 344 West 121 Street, Manhattan have?

The Department of City Planning's PLUTO tax-lot file lists 2 residential units at 344 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 and the city's PLUTO tax-lot file. This page is current through September 27, 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.

Sources. HPD housing violations and OATH/ECB hearing results, plus DOB violations, DOB complaints and the city's PLUTO tax-lot file. Counts cover HPD Class B and C violations from the last 3 years that HPD still shows open, and OATH/ECB summonses from the same 3 years that the city still shows active. The city's own pages can show more, never fewer.

Cite this page

ViolationScout, 344 West 121st St, Manhattan: violations, from New York City's HPD violation and OATH/ECB hearing data. Figures through September 27, 2026. https://violationscout.com/building/344-west-121-street-manhattan

How we count: /method.

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