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ViolationScout36 open Class C, with 0 certifications filed and 6 new Class C in the last 180 days, too few to call a direction.Is this your building?
Buildings641 St Marks Avenue, BrooklynCurrent through

641 St Marks Ave, Brooklyn

BBL 3-01219-0069

En español: 36 violaciones de Clase C abiertas (peligro inmediato) y 107 abiertas en total. La más antigua del HPD lleva 9 años abierta, desde el 26 de julio de 2017.

Open violations are sitting, with little movement either way. 36 open Class C, with 0 certifications filed and 6 new Class C in the last 180 days, too few to call a direction.

The oldest open HPD violation has been open 9 years, since July 26, 2017.

Since September 29, 2023, certifications were filed on 7 Class C violations, all 7 by the original certify-by date. How certification works

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36 open Class C. The oldest open HPD violation was filed July 26, 2017.

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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
4 active DOB violations, most of them for low-pressure boilers. The newest was issued November 14, 2025.
Housing court
1 open housing court case, opened October 19, 2023.
DOB complaints
2 DOB complaints in the 12 months to September 25, 2026. The newest was filed May 5, 2026.
HPD emergency repair orders
2 completed HPD emergency repair orders since September 29, 2023, awarded for $729 in total. The most recent of the 2, a general construction order, was opened December 27, 2023.

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 C36 open most often Heat / Hot Water
Heat / Hot WaterNotice sent19092905
Heat / Hot WaterNotice sent19092904
Vermin / InfestationNotice sent to tenant19005869
Heat / Hot WaterNotice sent19005868
Heat / Hot WaterNotice sent19005596
Heat / Hot WaterNotice sent19005595
Vermin / InfestationNotice sent18379668
Vermin / InfestationNotice sent18318886
Heat / Hot WaterNotice sent18318885
Heat / Hot WaterNotice sent18318884
The report lists all 36, each with the city's own words and the date on its notice. What the report adds
Class B63 open most often Fire Safety
Open19242842
Notice sent19242841
Notice sent19093308
Notice sent19005867
Notice sent19005594
Notice sent19005593
Notice sent18874495
Notice sent18874494
Notice sent18804109
Notice sent18804108
The report lists all 63, each with the city's own words and the date on its notice. What the report adds
OATH/ECB8 open most often Construction
Construction, Class 2Decided by default39187433L
Construction, Class 2Decided by default39166418K
Construction, Class 2Decided by default39539457MPROSPECT HEIGHTS 637-641 REALTY LLC
Class 2Found in violation39124857R
Boilers, Class 3Decided by default39115869J
Class 2Found in violation39113172K
Construction, Class 1Found in violation39112581R
Boilers, Class 2Decided by default39102744N

The full report on 641 St Marks Ave, Brooklyn

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The most common category among the open records here is heat and hot water.

Heat and hot water in Brooklyn

Other buildings on this tax block

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Questions about this building

Does 641 St Marks Avenue, Brooklyn have open violations?

Yes. 641 St Marks Avenue, Brooklyn had 107 open violations on September 27, 2026: 99 from HPD and 8 from OATH/ECB. 36 are Class C, the class HPD treats as immediately hazardous. The oldest open HPD violation has been open 9 years, since July 26, 2017.

Is 641 St Marks Avenue, Brooklyn getting better or worse?

Open violations are sitting, with little movement either way. 36 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 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 641 St Marks Avenue, Brooklyn?

Since September 29, 2023, certifications were filed on 7 Class C violations, all 7 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 641 St Marks Avenue, Brooklyn have active DOB violations?

Yes. 4 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.

Is 641 St Marks Avenue, Brooklyn in housing court?

Yes. 1 open housing court case, opened October 19, 2023. HPD takes buildings to housing court to get violations fixed and heat and hot water restored, and it joins tenants' own repair cases, called tenant actions. A case stays open until the court closes it.

Has DOB received complaints about 641 St Marks Avenue, Brooklyn?

Yes. 2 DOB complaints in the 12 months to September 25, 2026. The newest was filed May 5, 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.

Are any HPD emergency repair orders at 641 St Marks Avenue, Brooklyn marked completed?

Yes. 2 completed HPD emergency repair orders since September 29, 2023, awarded for $729 in total. The most recent of the 2, a general construction order, was opened December 27, 2023. HPD orders an emergency repair when a hazardous condition cited in a violation, or in another agency's emergency order, is not corrected, and does the work itself or through a contractor. The amounts are what the orders were awarded for, not a bill: this page does not show what was charged to the property or whether it was paid. Orders for lab tests, such as dust-wipe and asbestos samples, are not counted.

When was 641 St Marks Avenue, Brooklyn built?

The city's record gives 1900 as the year 641 St Marks Avenue, Brooklyn 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 4 floors.

How many apartments does 641 St Marks Avenue, Brooklyn have?

The Department of City Planning's PLUTO tax-lot file lists 30 residential units at 641 St Marks Avenue, Brooklyn. 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, HPD's housing court cases, DOB complaints, HPD emergency repair orders 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, HPD's housing court cases, DOB complaints, HPD emergency repair orders 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, 641 St Marks Ave, Brooklyn: 36 open Class C, from New York City's HPD violation and OATH/ECB hearing data. Figures through September 27, 2026. https://violationscout.com/building/641-st-marks-avenue-brooklyn

How we count: /method.

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