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 26, 2026: 21 from HPD. 11 are Class C, the class HPD treats as immediately hazardous.
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 26, 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 28, 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 last 12 months. 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 28, 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.
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 and the city's PLUTO tax-lot file. This page is current through September 26, 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.
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 26, 2026. https://violationscout.com/building/401-east-21-street-brooklyn
How we count: /method.