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ViolationScout11 open Class C, with nothing filed or new in the last 180 days.Your building
Buildings784 Knickerbocker Avenue, BrooklynCurrent through

784 Knickerbocker Ave, Brooklyn

BBL 3-03412-0030

Built
1925
Floors
2
Residential units
2
Building type
Residence with stores or offices
Zoning district
R6
Lot area
2,100 sq ft
Floor area
4,200 sq ft

En español: 11 violaciones de Clase C abiertas (peligro inmediato) y 18 abiertas en total. La más antigua del HPD lleva 4 años abierta, desde el 29 de diciembre de 2021.

Open now, most hazardous first

  1. 11

    Class C, immediately hazardous. Most often Lead Paint.

    12 open counting every year, the oldest since

    Get these certified
  2. 6

    Class B, hazardous

    See the 6
  3. 1

    OATH/ECB summons still active

    See it

Open violations are sitting, with little movement either way. 11 open Class C, with nothing filed or new in the last 180 days.

Since October 12, 2023, certifications were filed on 3 Class C violations, all 3 by the original certify-by date. How certification works

The original certify-by dates on the 17 open HPD violations have all passed. The latest was September 29, 2025. The report prints the date beside each one.

Is this your building?

11 open Class C. The oldest open HPD violation was filed December 29, 2021.

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.

Your details stay with us, and go only to the one firm you are introduced to. No lists, no resale.

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Or file it yourself: what it can hold up, and how correction is filed

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

Open Class C, week by week
11 on September 24, 2026 and 11 on October 8.
OATH/ECB summonses
1 DOB summons here since January 1, 2019, with $1,250 in penalties imposed. It is still active, the one listed under OATH/ECB.
  • April 23, 2026, DOB: Failure to maintain building walls or appurtenances. Resolved by stipulation, $1,250 penalty imposed.
DOB violations
1 active DOB violation, issued August 16, 1993.
Housing court
3 housing court cases here since 2009.
DOB complaints
1 DOB complaint in the 12 months to September 25, 2026. It was filed April 22, 2026.
Boiler inspection
Inspected March 20, 2026.
Bedbug report
Filed June 16, 2026, for the year to October 31, 2025.
Rent stabilization
Has rent-stabilized apartments (2024 registration).
Tax exemption
Has a J-51 tax exemption (DOF 2026/27 roll). DOF lists its start year as 2011.

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 C11 open most often Lead Paint
Vermin / InfestationDefect letter sent17819352
Lead PaintNotice sent17744488
Lead PaintDefect letter sent17744423
Lead PaintDefect letter sent17744422
Lead PaintDefect letter sent17744421
Vermin / InfestationDefect letter sent17727415
Not complied with17725452
Not complied with17720290
Heat / Hot WaterNotice sent17703597
Not complied with17698342
The report lists all 11, each with the city's own words and the date on its notice. What the report adds
Class B6 open
Notice sent18075645
MoldNo access to reinspect (first try)18156647
Not complied with17725453
Notice sent17703599
Notice sent17695061
Notice sent17695060
OATH/ECB1 open
Construction, Class 2Settled by agreement39185737LJC REAL ESTATE DEVELOPMENT LP

The full report on 784 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.

The most common category among the open records here is lead paint.

Lead paint in Brooklyn

Nearby buildings

Questions about this building

Does 784 Knickerbocker Avenue, Brooklyn have open violations?

Yes. 784 Knickerbocker Avenue, Brooklyn had 18 open violations on October 10, 2026: 1 from OATH/ECB and 17 from HPD. 11 are Class C, the class HPD treats as immediately hazardous. The oldest open HPD violation has been open 4 years, since December 29, 2021.

Is 784 Knickerbocker Avenue, Brooklyn getting better or worse?

Open violations are sitting, with little movement either way. 11 open Class C, with nothing filed or new in the last 180 days. That window ends October 10, 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 784 Knickerbocker Avenue, Brooklyn?

Since October 12, 2023, certifications were filed on 3 Class C violations, all 3 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 784 Knickerbocker Avenue, Brooklyn have active DOB violations?

Yes. 1 active DOB violation, issued August 16, 1993. 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 784 Knickerbocker Avenue, Brooklyn been in housing court?

Yes. 3 housing court cases here since 2009. 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 784 Knickerbocker Avenue, Brooklyn?

Yes. 1 DOB complaint in the 12 months to September 25, 2026. It was filed April 22, 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 the boiler at 784 Knickerbocker Avenue, Brooklyn last inspected?

On March 20, 2026. 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.

When did 784 Knickerbocker Avenue, Brooklyn last file its bedbug report?

On June 16, 2026, 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 784 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.

Does 784 Knickerbocker Avenue, Brooklyn have a property tax exemption?

The building has a J-51 tax exemption on DOF's 2026/27 roll. DOF lists its start year as 2011. An exemption lowers a property's tax bill by reducing its assessed value.

When was 784 Knickerbocker Avenue, Brooklyn built?

The city's record gives 1925 as the year 784 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 2 floors.

How many apartments does 784 Knickerbocker Avenue, Brooklyn have?

The Department of City Planning's PLUTO tax-lot file lists 2 residential units at 784 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 OATH/ECB summonses from DOB and FDNY, DOB violations, HPD's housing court cases, DOB complaints, the Rent Guidelines Board's stabilized-building lists, DOF's exemption rolls, DOB boiler inspection reports, HPD's annual bedbug reports 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 OATH/ECB summonses from DOB and FDNY, DOB violations, HPD's housing court cases, DOB complaints, the Rent Guidelines Board's stabilized-building lists, DOF's exemption rolls, DOB boiler inspection reports, HPD's annual bedbug 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, 784 Knickerbocker Ave, Brooklyn: 2 units, 11 open Class C, from New York City's HPD violation and OATH/ECB hearing data. Figures through October 10, 2026. https://violationscout.com/building/784-knickerbocker-avenue-brooklyn

How we count: /method.

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