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ViolationScout15 new Class C against 0 certifications filed in the last 180 days.Is this your building?
Buildings735 Knickerbocker Avenue, BrooklynCurrent through

735 Knickerbocker Ave, Brooklyn

BBL 3-03399-0010

En español: 15 violaciones de Clase C abiertas (peligro inmediato) y 22 abiertas en total. La más antigua del HPD lleva 42 años abierta, desde el 9 de marzo de 1984.

New violations are coming in faster than certifications are filed. 15 new Class C against 0 certifications filed in the last 180 days.

The oldest open HPD violation has been open 42 years, since March 9, 1984.

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15 open Class C. The oldest open HPD violation was filed March 9, 1984.

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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.

Boiler inspection
Inspected October 20, 2025. Boilers in buildings with 6 or more apartments are inspected every calendar year. Need this filed?
Rent stabilization
Has rent-stabilized apartments (2024 registration).

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

FiledCategoryStatusNumber
Class C15 open most often Fire Safety
Fire SafetyNotice sent19223804
Notice sent19211453
Fire SafetyNotice sent19211452
Fire SafetyNotice sent19211451
Fire SafetyNotice sent19211450
Fire SafetyNotice sent19211449
Heat / Hot WaterNotice sent19211446
Heat / Hot WaterNotice sent19211445
Fire SafetyNotice sent19182678
Fire SafetyNotice sent19170346
The report lists all 15, each with the city's own words and the date on its notice. What the report adds
Class B7 open most often Fire Safety
Fire SafetyNotice sent19211448
Fire SafetyNotice sent19211447
Notice sent19182671
Notice sent19170338
Notice sent19170337
Fire SafetyNotice sent19170336
Fire SafetyNotice sent19170335

The full report on 735 Knickerbocker Ave, Brooklyn

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Usually ready within 15 minutes of payment, on your order page and by email. If it tells you nothing you did not already know, reply and we refund it.

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Questions about this building

Does 735 Knickerbocker Avenue, Brooklyn have open violations?

Yes. 735 Knickerbocker Avenue, Brooklyn had 22 open violations on September 27, 2026: 22 from HPD. 15 are Class C, the class HPD treats as immediately hazardous. The oldest open HPD violation has been open 42 years, since March 9, 1984.

Is 735 Knickerbocker Avenue, Brooklyn getting better or worse?

New violations are coming in faster than certifications are filed. 15 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 was the boiler at 735 Knickerbocker Avenue, Brooklyn last inspected?

On October 20, 2025. DOB requires a boiler in a building with 6 or more apartments to be inspected once every calendar year, with the report filed within 14 days of the inspection. Low-pressure boilers in residential buildings with 5 or fewer apartments are exempt.

Is 735 Knickerbocker Avenue, Brooklyn 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 735 Knickerbocker Avenue, Brooklyn built?

The city's record gives 1909 as the year 735 Knickerbocker Avenue, Brooklyn was built, in the Department of City Planning's PLUTO tax-lot file. The same file classes it as a residence with stores or offices with 4 floors.

How many apartments does 735 Knickerbocker Avenue, Brooklyn have?

The Department of City Planning's PLUTO tax-lot file lists 6 residential units at 735 Knickerbocker 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 the Rent Guidelines Board's stabilized-building lists, DOB boiler inspection reports 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 the Rent Guidelines Board's stabilized-building lists, DOB boiler inspection reports 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, 735 Knickerbocker Ave, Brooklyn: 6 units, 15 open Class C, from New York City's HPD violation and OATH/ECB hearing data. Figures through September 27, 2026. https://violationscout.com/building/735-knickerbocker-avenue-brooklyn

How we count: /method.

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