Skip to content
ViolationScout14 certifications filed against 4 new Class C in the last 180 days.Is this your building?
Buildings401 East 21 Street, BrooklynCurrent through

401 East 21st St, Brooklyn

BBL 3-05152-0028

En español: 11 violaciones de Clase C abiertas (peligro inmediato) y 21 abiertas en total. La más antigua del HPD lleva 7 años abierta, desde el 7 de marzo de 2019.

Certifications are being filed faster than new violations come in. 14 certifications filed against 4 new Class C in the last 180 days.

The oldest open HPD violation has been open 7 years, since March 7, 2019.

Since September 29, 2023, certifications were filed on 17 Class C violations, all 17 by the original certify-by date. HPD now marks 2 of them Invalid Certification. How certification works

Is this your building?

11 open Class C. The oldest open HPD violation was filed March 7, 2019.

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.

Request a sample file

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.

DOB violations
3 active DOB violations. The newest was issued December 20, 2021.
Housing court
1 open housing court case, opened April 20, 2022.
DOB complaints
1 DOB complaint in the 12 months to September 25, 2026. It was filed February 15, 2026.
Boiler inspection
Inspected April 28, 2026. Boilers in buildings with 6 or more apartments are inspected every calendar year.
Bedbug report
Filed December 15, 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 order
1 completed HPD emergency repair order since September 29, 2023: a general construction order, opened October 1, 2025, awarded for $450.

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
Vermin / InfestationNotice sent to tenant19126048WILSON FLAT INC
Vermin / InfestationNotice sent to tenant19126047WILSON FLAT INC
Fire SafetyNotice sent19023244
Heat / Hot WaterNotice sent18811754
Invalid certification18133894
Invalid certification18049930
Notice sent17753575
Notice sent17738822
Notice sent17370359
Notice sent17370314
The report lists all 11, each with the city's own words and the date on its notice. What the report adds
Class B10 open most often Mold
Notice sent19168706WILSON FLAT INC
Notice sent19126046WILSON FLAT INC
Notice sent19126043WILSON FLAT INC
MoldDefect letter sent18940365
Notice sent18850480
Notice sent18850479
MoldNotice sent to tenant19166670
Not complied with18811751
Not complied with17738823
Not complied with17714703

The full report on 401 East 21st St, Brooklyn

Get the report on 401 East 21st 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 401 East 21 Street, Brooklyn have open violations?

Yes. 401 East 21 Street, Brooklyn had 21 open violations on September 27, 2026: 21 from HPD. 11 are Class C, the class HPD treats as immediately hazardous. The oldest open HPD violation has been open 7 years, since March 7, 2019.

Is 401 East 21 Street, Brooklyn getting better or worse?

Certifications are being filed faster than new violations come in. 14 certifications filed against 4 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 401 East 21 Street, Brooklyn?

Since September 29, 2023, certifications were filed on 17 Class C violations, all 17 by the original certify-by date. 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 401 East 21 Street, Brooklyn have active DOB violations?

Yes. 3 active DOB violations. The newest was issued December 20, 2021. 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 401 East 21 Street, Brooklyn in housing court?

Yes. 1 open housing court case, opened April 20, 2022. 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 401 East 21 Street, Brooklyn?

Yes. 1 DOB complaint in the 12 months to September 25, 2026. It was filed February 15, 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 401 East 21 Street, Brooklyn marked completed?

Yes. 1 completed HPD emergency repair order since September 29, 2023: a general construction order, opened October 1, 2025, awarded for $450. 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.

When was the boiler at 401 East 21 Street, Brooklyn last inspected?

On April 28, 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 401 East 21 Street, Brooklyn last file its bedbug report?

On December 15, 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 401 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 401 East 21 Street, Brooklyn built?

The city's record gives 1918 as the year 401 East 21 Street, Brooklyn was built, in the Department of City Planning's PLUTO tax-lot file. The same file classes it as a walk-up apartment building with 4 floors.

How many apartments does 401 East 21 Street, Brooklyn have?

The Department of City Planning's PLUTO tax-lot file lists 20 residential units at 401 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 DOB violations, HPD's housing court cases, DOB complaints, the Rent Guidelines Board's stabilized-building lists, HPD emergency repair orders, DOB boiler inspection reports, HPD's annual bedbug 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 DOB violations, HPD's housing court cases, DOB complaints, the Rent Guidelines Board's stabilized-building lists, HPD emergency repair orders, 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, 401 East 21st St, Brooklyn: 11 open Class C, from New York City's HPD violation and OATH/ECB hearing data. Figures through September 27, 2026. https://violationscout.com/building/401-east-21-street-brooklyn

How we count: /method.

Is this your building?