Is 420 E 21st St rent stabilized?
420 E 21st St is a registered NYC rent-stabilized building in Flatbush, Brooklyn (11226). It has about 32 apartments, built in 1924.
Also written as 420 East 21st Street — or 420 E 21st St, Brooklyn, NY 11226.
How this building compares
With about 32 apartments it sits near the middle of the 564 rent-stabilized buildings this site tracks in Flatbush, where the median building has 35. Its 1924 construction date sits close to the 1931 median for stabilized buildings tracked in the neighborhood. HPD lists 9 open violations here, about one for every 4 apartments — below the 0.9 per apartment median for tracked buildings in the neighborhood. Of the 241 violations on record at the address, 54 are class C — HPD's immediately hazardous grade. Tenants have filed 589 HPD complaints at the address, 21 of them in the last twelve months.
Building details
| Borough | Brooklyn |
| Neighborhood | Flatbush |
| ZIP | 11226 |
| Year built | 1924 |
| Apartments | 32 |
| Rent-stabilized | Yes — DHCR registered |
| Stabilization code | MULTIPLE DWELLING A |
| BBL | 3051510021 |
Owner & management
| Owner | 402 CORTLEYOU ROAD LLC 57 FIFTH AVE #STE A' · BROOKLYN, NY 11217 |
| Managing agent | ISMAEL RIOJA |
Building conditions
| HPD violations | 9 open / 241 total · 7 in last 12 mo |
| HPD complaints | 0 open / 589 total |
| HPD registration last filed | September 15, 2025 |