Is 520 E 21st St rent stabilized?
520 E 21st St is a registered NYC rent-stabilized building in Flatbush, Brooklyn (11226). It has about 102 apartments, built in 1951.
Also written as 520 East 21st Street — or 520 E 21st St, Brooklyn, NY 11226.
How this building compares
With about 102 apartments it is larger than 97% of the 564 rent-stabilized buildings this site tracks in Flatbush. It went up in 1951, 20 years after the 1931 median for stabilized buildings tracked in the neighborhood. HPD lists 231 open violations here, about 2.3 per apartment — above the 0.9 per apartment median for tracked buildings in the neighborhood. Of the 1,111 violations on record at the address, 317 are class C — HPD's immediately hazardous grade, and 74 of them are still open. HPD issued 234 new violations at the address in the last twelve months.
Building details
| Borough | Brooklyn |
| Neighborhood | Flatbush |
| ZIP | 11226 |
| Year built | 1951 |
| Apartments | 102 |
| Rent-stabilized | Yes — DHCR registered |
| Stabilization code | MULTIPLE DWELLING A |
| BBL | 3051840006 |
Owner & management
| Owner | DITMAS FLATS LLC 4711 12TH AVENUE #A8 · BROKLYN, NY 11219 |
| Managing agent | YECHIEL WEINBERGER |
Building conditions
| HPD violations | 231 open / 1111 total · 234 in last 12 mo |
| HPD complaints | 6 open / 1340 total |
| HPD registration last filed | August 24, 2025 |
Full building report — $9
Frequently asked questions
Is 520 E 21st St rent stabilized?
520 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 520 E 21st St?
520 E 21st St (BBL 3051840006) has about 102 residential apartments and was built in 1951, from NYC PLUTO. PLUTO counts the building's units; it does not say how many of them are rent stabilized.