Is 400 E 21st St rent stabilized?
400 E 21st St is a registered NYC rent-stabilized building in Flatbush, Brooklyn (11226). It has about 53 apartments, built in 1963.
Also written as 400 East 21st Street — or 400 E 21st St, Brooklyn, NY 11226.
How this building compares
With about 53 apartments it is larger than 69% of the 564 rent-stabilized buildings this site tracks in Flatbush. It went up in 1963, 32 years after the 1931 median for stabilized buildings tracked in the neighborhood. HPD lists 11 open violations here, about one for every 5 apartments — below the 0.9 per apartment median for tracked buildings in the neighborhood. Of the 285 violations on record at the address, 62 are class C — HPD's immediately hazardous grade, and 2 of them are still open. HPD issued 12 new violations at the address in the last twelve months.
Building details
| Borough | Brooklyn |
| Neighborhood | Flatbush |
| ZIP | 11226 |
| Year built | 1963 |
| Apartments | 53 |
| Rent-stabilized | Yes — DHCR registered |
| Stabilization code | MULTIPLE DWELLING A |
| BBL | 3051510012 |
Owner & management
| Owner | 400 E 21 ST LLC 110 EAST 55TH ST #BSMT · New York, NY 10022 |
| Managing agent | 400 E 21 ST LLC |
Building conditions
| HPD violations | 11 open / 285 total · 12 in last 12 mo |
| HPD complaints | 0 open / 1167 total |
| HPD registration last filed | October 14, 2025 |
Full building report — $9
Frequently asked questions
Is 400 E 21st St rent stabilized?
400 E 21st St in Flatbush, Brooklyn is registered as rent stabilized in the New York State DHCR 2024 rent-stabilized building files, where its stabilization code is MULTIPLE DWELLING A. Registration is recorded for the building, not for each apartment in it, so an individual unit here can still have been deregulated — ask the landlord or DHCR for that apartment's rent history before relying on it.
How many apartments are at 400 E 21st St?
400 E 21st St (BBL 3051510012) has about 53 residential apartments and was built in 1963, from NYC PLUTO. PLUTO counts the building's units; it does not say how many of them are rent stabilized.