Is 312 To 324 E 21st St rent stabilized?
312 To 324 E 21st St is a registered NYC rent-stabilized building in Flatbush, Brooklyn (11226). It has about 54 apartments, built in 1940.
Also written as 312 To 324 East 21st Street — or 312 To 324 E 21st St, Brooklyn, NY 11226.
How this building compares
With about 54 apartments it is larger than 71% of the 564 rent-stabilized buildings this site tracks in Flatbush. Its 1940 construction date sits close to the 1931 median for stabilized buildings tracked in the neighborhood. HPD lists 77 open violations here, about 1.4 per apartment — above the 0.9 per apartment median for tracked buildings in the neighborhood. Of the 470 violations on record at the address, 102 are class C — HPD's immediately hazardous grade. Tenants have filed 715 HPD complaints at the address, 88 of them in the last twelve months.
Building details
| Borough | Brooklyn |
| Neighborhood | Flatbush |
| ZIP | 11226 |
| Year built | 1940 |
| Apartments | 54 |
| Rent-stabilized | Yes — DHCR registered |
| Stabilization code | MULTIPLE DWELLING A |
| BBL | 3051240012 |
Owner & management
| Owner | 312 East 21 Holding LLC 261 Lenox Road OFFICE · Brooklyn, NY 11226 |
| Managing agent | Yida Stern |
Building conditions
| HPD violations | 77 open / 470 total · 47 in last 12 mo |
| HPD complaints | 9 open / 715 total |
| HPD registration last filed | August 27, 2025 |