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 159 open violations here, about 1.6 per apartment — above the 0.9 per apartment median for tracked buildings in the neighborhood. Of the 1,032 violations on record at the address, 296 are class C — HPD's immediately hazardous grade. Tenants have filed 1,321 HPD complaints at the address, 178 of them 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 | 159 open / 1032 total · 174 in last 12 mo |
| HPD complaints | 20 open / 1321 total |
| HPD registration last filed | August 24, 2025 |