Is 657 E 21st St rent stabilized?
657 E 21st St is a registered NYC rent-stabilized building in Flatbush, Brooklyn (11226). It has about 20 apartments, built in 1931.
Also written as 657 East 21st Street — or 657 E 21st St, Brooklyn, NY 11226.
How this building compares
With about 20 apartments it is smaller than 68% of the 564 rent-stabilized buildings this site tracks in Flatbush. Its 1931 construction date sits close to the 1931 median for stabilized buildings tracked in the neighborhood. HPD lists 18 open violations here, about 0.9 per apartment — matching the median for tracked buildings in the neighborhood. Of the 765 violations on record at the address, 186 are class C — HPD's immediately hazardous grade. Tenants have filed 1,285 HPD complaints at the address, 10 of them in the last twelve months.
Building details
| Borough | Brooklyn |
| Neighborhood | Flatbush |
| ZIP | 11226 |
| Year built | 1931 |
| Apartments | 20 |
| Rent-stabilized | Yes — DHCR registered |
| Stabilization code | MULTIPLE DWELLING A |
| BBL | 3052210086 |
Owner & management
| Owner | 657 PROPERTIES LLC 216 RIVER AVE. · LAKEWOOD, NJ 08701 |
| Managing agent | 657 PROPERTIES LLC |
Building conditions
| HPD violations | 18 open / 765 total · 9 in last 12 mo |
| HPD complaints | 0 open / 1285 total |
| HPD registration last filed | September 24, 2025 |