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ViolationScout29 certifications filed and 24 new Class C in the last 180 days, neither far ahead.Is this your building?
Buildings621 Lefferts Avenue, BrooklynCurrent through

621 Lefferts Ave, Brooklyn

BBL 3-01326-0045

En español: 26 violaciones de Clase C abiertas (peligro inmediato) y 39 abiertas en total. La más antigua del HPD lleva 28 años abierta, desde el 24 de diciembre de 1997.

Certifications are being filed about as fast as new violations come in. 29 certifications filed and 24 new Class C in the last 180 days, neither far ahead.

The oldest open HPD violation has been open 28 years, since December 24, 1997.

Since September 29, 2023, certifications were filed on 53 Class C violations: 51 by the original certify-by date, 2 after it. HPD now marks 1 of them False Certification. How certification works

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26 open Class C. The oldest open HPD violation was filed December 24, 1997.

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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
2 active DOB violations. The newest was issued June 20, 2023.
Energy benchmarking
ENERGY STAR score 71 for 2024, against a median of 67 for Multifamily Housing that year.
Local Law 97
Covered under Article 321, the path for certain affordable housing and houses of worship (DOB's list, March 1, 2026).
Boiler inspection
Inspected February 24, 2026. Boilers in buildings with 6 or more apartments are inspected every calendar year.
Bedbug report
Filed December 5, 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).
HPD emergency repair orders
2 completed HPD emergency repair orders since September 29, 2023, awarded for $4,880 in total. The most recent of the 2, a general construction order, was opened January 10, 2026.

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 C26 open most often Lead Paint
Fire SafetyNotice sent19208474M & M CROWN REALTY, LLC
Notice sent19208472M & M CROWN REALTY, LLC
Notice sent19043210
Lead PaintNotice sent19042234
Lead PaintNotice sent19042233
Lead PaintNotice sent19042232
Lead PaintNotice sent19042231
Lead PaintNotice sent19042230
Lead PaintNotice sent19042229
Lead PaintNotice sent19042227
The report lists all 26, each with the city's own words and the date on its notice. What the report adds
Class B12 open most often Fire Safety
Notice sent19208476M & M CROWN REALTY, LLC
Notice sent19208475M & M CROWN REALTY, LLC
Notice sent19208473M & M CROWN REALTY, LLC
Notice sent19043211
Fire SafetyFalse certification18789618
Fire SafetyFalse certification18789617
Fire SafetyNotice sent18760019
Fire SafetyNotice sent18760018
Notice sent18760017
Notice sent18760016
The report lists all 12, each with the city's own words and the date on its notice. What the report adds
OATH/ECB1 open
Construction, Class 2Found in violation39130313J

The full report on 621 Lefferts Ave, Brooklyn

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

Lead paint in Brooklyn

Other buildings on this tax block

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Questions about this building

Does 621 Lefferts Avenue, Brooklyn have open violations?

Yes. 621 Lefferts Avenue, Brooklyn had 39 open violations on September 27, 2026: 38 from HPD and 1 from OATH/ECB. 26 are Class C, the class HPD treats as immediately hazardous. The oldest open HPD violation has been open 28 years, since December 24, 1997.

Is 621 Lefferts Avenue, Brooklyn getting better or worse?

Certifications are being filed about as fast as new violations come in. 29 certifications filed and 24 new Class C in the last 180 days, neither far ahead. 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 621 Lefferts Avenue, Brooklyn?

Since September 29, 2023, certifications were filed on 53 Class C violations: 51 by the original certify-by date, 2 after it. HPD now marks 1 of them False Certification. 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 621 Lefferts Avenue, Brooklyn have active DOB violations?

Yes. 2 active DOB violations. The newest was issued June 20, 2023. 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.

Are any HPD emergency repair orders at 621 Lefferts Avenue, Brooklyn marked completed?

Yes. 2 completed HPD emergency repair orders since September 29, 2023, awarded for $4,880 in total. The most recent of the 2, a general construction order, was opened January 10, 2026. 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.

What is the ENERGY STAR score for 621 Lefferts Avenue, Brooklyn?

ENERGY STAR score 71 for 2024, against a median of 67 for Multifamily Housing that year. Buildings over 25,000 square feet report their energy use to the city every year under Local Law 84. The ENERGY STAR score runs from 1 to 100 and compares a building with similar ones nationwide; 50 is the national median. The score is the one the city publishes, and this page never estimates a Local Law 97 emissions penalty. A lot that reported several properties in one year is not scored here.

When was the boiler at 621 Lefferts Avenue, Brooklyn last inspected?

On February 24, 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 621 Lefferts Avenue, Brooklyn last file its bedbug report?

On December 5, 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 621 Lefferts Avenue, Brooklyn covered by Local Law 97?

Yes. It is on DOB's Local Law 97 covered buildings list. Covered under Article 321, the path for certain affordable housing and houses of worship (DOB's list, March 1, 2026). Local Law 97 sets greenhouse gas limits for most New York City buildings over 25,000 square feet, and DOB's covered buildings list says which path each building is on. The list reflects DOB's records, which owners can ask DOB to correct. This page never estimates a penalty or says whether a building complies.

Is 621 Lefferts 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 621 Lefferts Avenue, Brooklyn built?

The city's record gives 1926 as the year 621 Lefferts Avenue, Brooklyn was built, in the Department of City Planning's PLUTO tax-lot file. The same file classes it as an elevator apartment building with 6 floors.

How many apartments does 621 Lefferts Avenue, Brooklyn have?

The Department of City Planning's PLUTO tax-lot file lists 122 residential units at 621 Lefferts 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, the Rent Guidelines Board's stabilized-building lists, HPD emergency repair orders, Local Law 84 energy reports, DOB boiler inspection reports, HPD's annual bedbug reports, DOB's Local Law 97 covered buildings list 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, the Rent Guidelines Board's stabilized-building lists, HPD emergency repair orders, Local Law 84 energy reports, DOB boiler inspection reports, HPD's annual bedbug reports, DOB's Local Law 97 covered buildings list 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 Lefferts Ave, Brooklyn: 26 open Class C, from New York City's HPD violation and OATH/ECB hearing data. Figures through September 27, 2026. https://violationscout.com/building/621-lefferts-avenue-brooklyn

How we count: /method.

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