Skip to content
ViolationScout14 new Class C against 0 certifications filed in the last 180 days.Your building
Buildings840 Hart Street, BrooklynCurrent through

840 Hart St, Brooklyn

BBL 3-03236-0015

Built
1931
Floors
3
Residential units
6
Building type
Walk-up building
Zoning district
R6
Lot area
2,500 sq ft
Floor area
5,250 sq ft

En español: 14 violaciones de Clase C abiertas (peligro inmediato) y 15 abiertas en total. La más antigua del HPD lleva 21 años abierta, desde el 28 de septiembre de 2005.

Open now, most hazardous first

  1. 14

    Class C, immediately hazardous

    24 open counting every year, the oldest since

    Get these certified
  2. 1

    Class B, hazardous

    See it

New violations are coming in faster than certifications are filed. 14 new Class C against 0 certifications filed in the last 180 days.

Since October 12, 2023, certifications were filed on 4 Class C violations, all 4 by the original certify-by date. How certification works

The earliest original certify-by date on the 15 open HPD violations is October 15, 2026. The report prints the date beside each one.

Is this your building?

14 open Class C. The oldest open HPD violation was filed September 28, 2005.

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.

¿Es su edificio? Déjenos un correo o un teléfono. Leemos cada solicitud.

See everything first: the building report, $19

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.

Get leads for your boroughs

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.

Get the report, $19

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

HPD vacate order
HPD's vacate order for part of the building has been in effect since October 5, 2026. Reason on the order: fire damage.
Open Class C, week by week
None on September 24, 2026 and 14 on October 8.
DOF tax lien sale
Listed for DOF's 2025 tax lien sale, for water and sewer charges only. The last list it appeared on was the 30-day notice of April 2025.
DOB violations
4 active DOB violations, most of them for construction. The newest was issued February 9, 2010.
Boiler inspection
Inspected December 13, 2025. Boilers in buildings with 6 or more apartments are inspected every calendar year. Need this filed?
Bedbug report
Filed December 12, 2025, for the year to October 31, 2025. Buildings with 3 or more apartments file one with HPD every year.
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 C14 open
Notice sent19268059
Notice sent19268049
Notice sent19268035
Notice sent19268021
Notice sent19268011
Notice sent19267619
Notice sent19267617
Notice sent19267614
Notice sent19267613
Notice sent19267612
The report lists all 14, each with the city's own words and the date on its notice. What the report adds
Class B1 open
Notice sent19267585

The full report on 840 Hart St, Brooklyn

Get the report on 840 Hart St, Brooklyn, $19 See a sample report

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.

Other buildings on this tax block

Nearby buildings

Questions about this building

Does 840 Hart Street, Brooklyn have open violations?

Yes. 840 Hart Street, Brooklyn had 15 open violations on October 10, 2026: 15 from HPD. 14 are Class C, the class HPD treats as immediately hazardous. The oldest open HPD violation has been open 21 years, since September 28, 2005.

Is 840 Hart Street, Brooklyn getting better or worse?

New violations are coming in faster than certifications are filed. 14 new Class C against 0 certifications filed 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 840 Hart Street, Brooklyn?

Since October 12, 2023, certifications were filed on 4 Class C violations, all 4 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.

Is an HPD vacate order in effect at 840 Hart Street, Brooklyn?

Yes. HPD's vacate order for part of the building has been in effect since October 5, 2026. Reason on the order: fire damage. A vacate order requires all or part of a building to be emptied for the reason on the order, and it stays in effect until HPD rescinds it. HPD Online shows whether an order has been rescinded since.

Does 840 Hart Street, Brooklyn have active DOB violations?

Yes. 4 active DOB violations, most of them for construction. The newest was issued February 9, 2010. 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.

When was the boiler at 840 Hart Street, Brooklyn last inspected?

On December 13, 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.

When did 840 Hart Street, Brooklyn last file its bedbug report?

On December 12, 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 840 Hart Street, 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 840 Hart Street, Brooklyn built?

The city's record gives 1931 as the year 840 Hart Street, Brooklyn was built, in the Department of City Planning's PLUTO tax-lot file. The same file classes it as a walk-up building with 3 floors.

How many apartments does 840 Hart Street, Brooklyn have?

The Department of City Planning's PLUTO tax-lot file lists 6 residential units at 840 Hart Street, 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 vacate orders, DOF's tax lien sale lists, DOB violations, the Rent Guidelines Board's stabilized-building lists, 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 HPD vacate orders, DOF's tax lien sale lists, DOB violations, the Rent Guidelines Board's stabilized-building lists, 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, 840 Hart St, Brooklyn: 6 units, 14 open Class C, from New York City's HPD violation and OATH/ECB hearing data. Figures through October 10, 2026. https://violationscout.com/building/840-hart-street-brooklyn

How we count: /method.

Is this your building?