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. Tenants have filed 1,167 HPD complaints at the address, 12 of them 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 |