The most common category among the open records here is vermin and pests.
Questions about this building
Does 21 Schaefer Street, Brooklyn have open violations?
Yes. 21 Schaefer Street, Brooklyn had 32 open violations on September 26, 2026: 32 from HPD. 15 are Class C, the class HPD treats as immediately hazardous.
Is 21 Schaefer Street, Brooklyn getting better or worse?
Open violations are sitting, with little movement either way. 15 open Class C, with 0 certifications filed and 7 new Class C in the last 180 days, too few to call a direction. 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 21 Schaefer Street, Brooklyn?
Since September 28, 2023, certifications were filed on 2 Class C violations, all 2 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.
Does 21 Schaefer Street, Brooklyn have active DOB violations?
Yes. 5 active DOB violations. The newest was issued October 31, 2018. 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 21 Schaefer Street, Brooklyn marked completed?
Yes. 2 completed HPD emergency repair orders since September 28, 2023, awarded for $3,815 in total. The most recent of the 2, a general construction order, was opened October 7, 2025. 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 21 Schaefer Street, Brooklyn?
ENERGY STAR score 17 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.
Is 21 Schaefer 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 21 Schaefer Street, Brooklyn built?
The city's record gives 2001 as the year 21 Schaefer 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 21 Schaefer Street, Brooklyn have?
The Department of City Planning's PLUTO tax-lot file lists 33 residential units at 21 Schaefer 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, the Rent Guidelines Board's stabilized-building lists, HPD emergency repair orders, Local Law 84 energy reports 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 records are the authority on what is open today.
Cite this page
ViolationScout, 21 Schaefer St, Brooklyn: 15 open Class C, from New York City's HPD violation and OATH/ECB hearing data. Figures through September 26, 2026. https://violationscout.com/building/21-schaefer-street-brooklyn-3034200044
How we count: /method.