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ViolationScout139 open Class C, with 0 certifications filed and 2 new Class C in the last 180 days, too few to call a direction.Is this your building?
Buildings621 Willoughby Avenue, BrooklynCurrent through

621 Willoughby Ave, Brooklyn

BBL 3-01760-0063

En español: 139 violaciones de Clase C abiertas (peligro inmediato) y 217 abiertas en total. La más antigua del HPD lleva 22 años abierta, desde el 15 de septiembre de 2004.

Open violations are sitting, with little movement either way. 139 open Class C, with 0 certifications filed and 2 new Class C in the last 180 days, too few to call a direction.

The oldest open HPD violation has been open 22 years, since September 15, 2004.

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139 open Class C. The oldest open HPD violation was filed September 15, 2004.

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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.

Alternative Enforcement Program
In HPD's Alternative Enforcement Program since January 31, 2023.
DOB violations
1 active DOB violation, issued January 9, 2020.
Housing court
1 open housing court case, opened December 18, 2025.
DOB complaints
1 DOB complaint, a conversion complaint, in the 12 months to September 25, 2026. It was filed November 14, 2025.

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

FiledCategoryStatusNumber
Class C139 open most often Vermin / Infestation
Notice sent19047611
Notice sent19047599
Notice sent18709199
Notice sent18709196
Notice sent18709192
Lead PaintNotice sent18785163
Lead PaintNotice sent18785162
Notice sent18549795
Notice sent18549765
MoldNotice sent to tenant18549747
The report lists all 139, each with the city's own words and the date on its notice. What the report adds
Class B72 open most often Fire Safety
Notice sent19047613
Notice sent19047606
Notice sent19047604
Fire SafetyNotice sent19047602
Fire SafetyNotice sent19047594
Notice sent18549776
Fire SafetyNotice sent18502113
Fire SafetyNotice sent18502112
Fire SafetyNotice sent18501636
Fire SafetyNotice sent18501635
The report lists all 72, each with the city's own words and the date on its notice. What the report adds
OATH/ECB6 open most often Construction
Construction, Class 1Decided by default39158254N
Construction, Class 2Decided by default39158253L
Construction, Class 1Decided by default39158252J
Construction, Class 2Decided by default39158251H
Construction, Class 1Decided by default39158250X
Construction, Class 2Decided by default35483662X

The full report on 621 Willoughby Ave, Brooklyn

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Questions about this building

Does 621 Willoughby Avenue, Brooklyn have open violations?

Yes. 621 Willoughby Avenue, Brooklyn had 217 open violations on September 27, 2026: 211 from HPD and 6 from OATH/ECB. 139 are Class C, the class HPD treats as immediately hazardous. The oldest open HPD violation has been open 22 years, since September 15, 2004.

Is 621 Willoughby Avenue, Brooklyn getting better or worse?

Open violations are sitting, with little movement either way. 139 open Class C, with 0 certifications filed and 2 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.

Is 621 Willoughby Avenue, Brooklyn in HPD's Alternative Enforcement Program?

Yes. In HPD's Alternative Enforcement Program since January 31, 2023. HPD puts a group of buildings with serious, long-running violations into the program each year. While a building is in it, HPD can make repairs itself and charge the cost to the property, and the building stays in until HPD discharges it.

Does 621 Willoughby Avenue, Brooklyn have active DOB violations?

Yes. 1 active DOB violation, issued January 9, 2020. 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 621 Willoughby Avenue, Brooklyn in housing court?

Yes. 1 open housing court case, opened December 18, 2025. 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 621 Willoughby Avenue, Brooklyn?

Yes. 1 DOB complaint, a conversion complaint, in the 12 months to September 25, 2026. It was filed November 14, 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.

When was 621 Willoughby Avenue, Brooklyn built?

The city's record gives 1901 as the year 621 Willoughby Avenue, Brooklyn was built, in the Department of City Planning's PLUTO tax-lot file. The same file classes it as a three-family dwelling with 3 floors.

How many apartments does 621 Willoughby Avenue, Brooklyn have?

The Department of City Planning's PLUTO tax-lot file lists 3 residential units at 621 Willoughby 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 HPD's Alternative Enforcement Program list, DOB violations, HPD's housing court cases, 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 HPD's Alternative Enforcement Program list, DOB violations, HPD's housing court cases, 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, 621 Willoughby Ave, Brooklyn: violations, from New York City's HPD violation and OATH/ECB hearing data. Figures through September 27, 2026. https://violationscout.com/building/621-willoughby-avenue-brooklyn

How we count: /method.

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