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ViolationScout6 open Class C, with 0 certifications filed and 6 new Class C in the last 180 days, too few to call a direction.Your building
Buildings521 West 143 Street, ManhattanCurrent through

521 West 143rd St, Manhattan

BBL 1-02075-0011

Built
1910
Floors
6
Residential units
24
Building type
Elevator building
Zoning district
R7A
Lot area
7,077 sq ft
Floor area
29,520 sq ft

En español: 6 violaciones de Clase C abiertas (peligro inmediato) y 17 abiertas en total. La más antigua del HPD lleva 38 años abierta, desde el 31 de agosto de 1988.

Open now, most hazardous first

  1. 6

    Class C, immediately hazardous. Most often Vermin / Infestation.

    11 open counting every year, the oldest since

    Get these certified
  2. 11

    Class B, hazardous. Most often Fire Safety.

    See the 11

Open violations are sitting, with little movement either way. 6 open Class C, with 0 certifications filed and 6 new Class C in the last 180 days, too few to call a direction.

The original certify-by dates on the 17 open HPD violations have all passed. The latest was August 24, 2026. The report prints the date beside each one.

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6 open Class C and a facade rated SWARMP. The oldest open HPD violation was filed August 31, 1988.

A firm we work with can take these on. We reply within one business day with the firm's name. You decide whether to talk to them. One firm, not a list.

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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.

For a letter to your landlord or a housing court case, the report lists every open violation here, each in the city's own words with the date on its notice. Get the report, $19

DOB violations
6 active DOB violations, most of them for boiler filings under Local Law 62/91. The newest was issued August 15, 2012.
DOB facade
Rated SWARMP in the latest facade report, filed February 20, 2022 (inspection cycle 9). Reports in earlier inspection cycles rated it Safe in 2016. SWARMP means safe with a repair and maintenance program. Need this filed?
DOB permits
DOB NOW lists 1 work permit here: Sidewalk Shed, issued February 27, 2024, expired February 27, 2025.
Local Law 97
Covered under Article 321, the path for certain affordable housing and houses of worship (DOB's list, March 1, 2026).
Bedbug report
Filed December 19, 2025, for the year to October 31, 2025. Buildings with 3 or more apartments file one with HPD every year.

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 C6 open most often Vermin / Infestation
Heat / Hot WaterNotice sent19047039523-27 WEST 143RD STREET HDFC
Vermin / InfestationNotice sent to tenant19047033523-27 WEST 143RD STREET HDFC
Vermin / InfestationNotice sent to tenant19047032523-27 WEST 143RD STREET HDFC
Notice sent19047028523-27 WEST 143RD STREET HDFC
Notice sent19047021523-27 WEST 143RD STREET HDFC
Notice sent19047019523-27 WEST 143RD STREET HDFC
Class B11 open most often Fire Safety
Notice sent19047034523-27 WEST 143RD STREET HDFC
Fire SafetyNotice sent19047031523-27 WEST 143RD STREET HDFC
Fire SafetyNotice sent19047030523-27 WEST 143RD STREET HDFC
Notice sent19047029523-27 WEST 143RD STREET HDFC
Notice sent19047027523-27 WEST 143RD STREET HDFC
Notice sent19047026523-27 WEST 143RD STREET HDFC
Notice sent19047025523-27 WEST 143RD STREET HDFC
Notice sent19047024523-27 WEST 143RD STREET HDFC
Notice sent19047022523-27 WEST 143RD STREET HDFC
Notice sent19047020523-27 WEST 143RD STREET HDFC
The report lists all 11, each with the city's own words and the date on its notice. What the report adds

The full report on 521 West 143rd St, Manhattan

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Questions about this building

Does 521 West 143 Street, Manhattan have open violations?

Yes. 521 West 143 Street, Manhattan had 17 open violations on October 10, 2026: 17 from HPD. 6 are Class C, the class HPD treats as immediately hazardous. The oldest open HPD violation has been open 38 years, since August 31, 1988.

Is 521 West 143 Street, Manhattan getting better or worse?

Open violations are sitting, with little movement either way. 6 open Class C, with 0 certifications filed and 6 new Class C in the last 180 days, too few to call a direction. That window ends October 10, 2026. It compares certifications filed with new Class C violations, and it describes what happened, not what anyone intends.

Does 521 West 143 Street, Manhattan have active DOB violations?

Yes. 6 active DOB violations, most of them for boiler filings under Local Law 62/91. The newest was issued August 15, 2012. 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.

What did the latest facade report find at 521 West 143 Street, Manhattan?

Rated SWARMP in the latest facade report, filed February 20, 2022 (inspection cycle 9). Reports in earlier inspection cycles rated it Safe in 2016. SWARMP means safe with a repair and maintenance program. Buildings taller than six stories must have their exterior walls inspected once in every inspection cycle under the city's Facade Inspection Safety Program (every five years under DOB's current rule), and each inspection report is filed with DOB as Safe, SWARMP (safe with a repair and maintenance program) or Unsafe. No Report Filed means DOB has no report for that cycle. The rating is from the latest filing and does not describe the facade today; DOB's page for the building shows anything filed since.

When did 521 West 143 Street, Manhattan last file its bedbug report?

On December 19, 2025, for the year to October 31, 2025. HPD asks the owner of every building with 3 or more apartments for this report once a year, covering November 1 to October 31, including buildings that had no bedbugs.

Is 521 West 143 Street, Manhattan covered by Local Law 97?

Yes. It is on DOB's Local Law 97 covered buildings list. Covered under Article 321, the path for certain affordable housing and houses of worship (DOB's list, March 1, 2026). Local Law 97 sets greenhouse gas limits for most New York City buildings over 25,000 square feet, and DOB's covered buildings list says which path each building is on. The list reflects DOB's records, which owners can ask DOB to correct. This page never estimates a penalty or says whether a building complies.

When was 521 West 143 Street, Manhattan built?

The city's record gives 1910 as the year 521 West 143 Street, Manhattan was built, in the Department of City Planning's PLUTO tax-lot file. The same file classes it as an elevator building with 6 floors.

How many apartments does 521 West 143 Street, Manhattan have?

The Department of City Planning's PLUTO tax-lot file lists 24 residential units at 521 West 143 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 facade filings, DOB NOW work permits, HPD's annual bedbug reports, DOB's Local Law 97 covered buildings list and the city's PLUTO tax-lot file. This page is current through October 10, 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 facade filings, DOB NOW work permits, HPD's annual bedbug reports, DOB's Local Law 97 covered buildings list 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, 521 West 143rd St, Manhattan: 24 units, 6 open Class C, from New York City's HPD violation and OATH/ECB hearing data. Figures through October 10, 2026. https://violationscout.com/building/521-west-143-street-manhattan

How we count: /method.

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