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ViolationScout56 certifications filed against 15 new Class C in the last 180 days.Is this your building?
Buildings520 East 21 Street, BrooklynCurrent through

520 East 21st St, Brooklyn

BBL 3-05184-0006

En español: 58 violaciones de Clase C abiertas (peligro inmediato) y 165 abiertas en total. La más antigua del HPD lleva 10 años abierta, desde el 5 de diciembre de 2015.

Certifications are being filed faster than new violations come in. 56 certifications filed against 15 new Class C in the last 180 days.

The oldest open HPD violation has been open 10 years, since December 5, 2015.

Since September 29, 2023, certifications were filed on 77 Class C violations: 75 by the original certify-by date, 2 after it. HPD now marks 2 of them Invalid Certification. How certification works

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58 open Class C, 2 OATH hearings starting October 7, 2026, and no facade report filed for inspection cycle 9. The oldest open HPD violation was filed December 5, 2015.

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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.

OATH hearings
2 hearings scheduled on DOB summonses, the first on October 7, 2026.
DOB violations
13 active DOB violations. The newest was issued June 20, 2023.
Housing court
4 open housing court cases, most of them tenant actions. The newest opened March 11, 2026.
DOB complaints
2 DOB complaints in the 12 months to September 25, 2026. The newest was filed August 11, 2026.
DOB facade
No Report Filed for inspection cycle 9. Need this filed?
Energy benchmarking
ENERGY STAR score 68 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 January 12, 2026. Boilers in buildings with 6 or more apartments are inspected every calendar year.
Bedbug report
Filed March 25, 2026, 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
16 completed HPD emergency repair orders since September 29, 2023, awarded for $26,836 in total. The most recent of the 16, a lead paint order, was opened May 14, 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 C58 open most often Vermin / Infestation
Lead PaintNotice sent19241159
Fire SafetyNotice sent19235569
Notice sent19235567
Heat / Hot WaterNotice sent19235550
Vermin / InfestationNotice sent to tenant19235547
Notice sent19235544
Vermin / InfestationNotice sent to tenant19235534
Notice sent19235533
Fire SafetyNotice sent19229476
Vermin / InfestationNotice sent to tenant19229466
The report lists all 58, each with the city's own words and the date on its notice. What the report adds
Class B99 open most often Mold
Notice sent19235570
Notice sent19235564
Notice sent19235562
Notice sent19235561
Notice sent19235559
Notice sent19235558
Notice sent19235557
Notice sent19235556
Notice sent19235555
Notice sent19235554
The report lists all 99, each with the city's own words and the date on its notice. What the report adds
OATH/ECB8 open
Elevators, Class 2Hearing pending39197027PDITMAS FLATS LLC
Elevators, Class 2Hearing pending39197026NDITMAS FLATS LLC
Elevators, Class 2Found in violation39120576M
Construction, Class 1Found in violation35679990J
Construction, Class 1Found in violation35679989M
Elevators, Class 2Found in violation39105111R
Construction, Class 1Found in violation35675438H
Construction, Class 1Found in violation35675428Y

The full report on 520 East 21st St, Brooklyn

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The most common category among the open records here is vermin and pests.

Vermin and pests in Brooklyn

Other buildings on this tax block

Nearby buildings

Questions about this building

Does 520 East 21 Street, Brooklyn have open violations?

Yes. 520 East 21 Street, Brooklyn had 165 open violations on September 27, 2026: 157 from HPD and 8 from OATH/ECB. 58 are Class C, the class HPD treats as immediately hazardous. The oldest open HPD violation has been open 10 years, since December 5, 2015.

Is 520 East 21 Street, Brooklyn getting better or worse?

Certifications are being filed faster than new violations come in. 56 certifications filed against 15 new Class C 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 were certifications filed on Class C violations at 520 East 21 Street, Brooklyn?

Since September 29, 2023, certifications were filed on 77 Class C violations: 75 by the original certify-by date, 2 after it. HPD now marks 2 of them Invalid 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 520 East 21 Street, Brooklyn have an OATH hearing coming up?

Yes. 2 hearings scheduled on DOB summonses, the first on October 7, 2026. DOB summonses are heard at OATH, the city's hearings office, and OATH can move a hearing to a later date. When nobody shows up, the summons is decided by default, the costliest way one ends.

Does 520 East 21 Street, Brooklyn have active DOB violations?

Yes. 13 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.

Is 520 East 21 Street, Brooklyn in housing court?

Yes. 4 open housing court cases, most of them tenant actions. The newest opened March 11, 2026. 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 520 East 21 Street, Brooklyn?

Yes. 2 DOB complaints in the 12 months to September 25, 2026. The newest was filed August 11, 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.

Are any HPD emergency repair orders at 520 East 21 Street, Brooklyn marked completed?

Yes. 16 completed HPD emergency repair orders since September 29, 2023, awarded for $26,836 in total. The most recent of the 16, a lead paint order, was opened May 14, 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 did the latest facade report find at 520 East 21 Street, Brooklyn?

No Report Filed for inspection cycle 9. Buildings taller than six stories must have their exterior walls inspected once in every inspection cycle under the city's Facade Inspection Safety Program (every five years under DOB's current rule), and each inspection report is filed with DOB as Safe, SWARMP (safe with a repair and maintenance program) or Unsafe. No Report Filed means DOB has no report for that cycle. The rating is from the latest filing and does not describe the facade today; DOB's page for the building shows anything filed since.

What is the ENERGY STAR score for 520 East 21 Street, Brooklyn?

ENERGY STAR score 68 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 520 East 21 Street, Brooklyn last inspected?

On January 12, 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 520 East 21 Street, Brooklyn last file its bedbug report?

On March 25, 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 520 East 21 Street, 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 520 East 21 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 520 East 21 Street, Brooklyn built?

The city's record gives 1951 as the year 520 East 21 Street, 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 520 East 21 Street, Brooklyn have?

The Department of City Planning's PLUTO tax-lot file lists 102 residential units at 520 East 21 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 OATH hearing dates, DOB violations, HPD's housing court cases, DOB complaints, the Rent Guidelines Board's stabilized-building lists, DOB facade filings, 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 OATH hearing dates, DOB violations, HPD's housing court cases, DOB complaints, the Rent Guidelines Board's stabilized-building lists, DOB facade filings, 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, 520 East 21st St, Brooklyn: 58 open Class C, from New York City's HPD violation and OATH/ECB hearing data. Figures through September 27, 2026. https://violationscout.com/building/520-east-21-street-brooklyn

How we count: /method.

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