Is 321 Flatbush Ave rent stabilized?
321 Flatbush Ave is a registered NYC rent-stabilized building in Prospect Heights, Brooklyn (11217). It has about 8 apartments, built in 1903.
Also written as 321 Flatbush Avenue — or 321 Flatbush Ave, Brooklyn, NY 11217.
How this building compares
With about 8 apartments it sits near the middle of the 262 rent-stabilized buildings this site tracks in Prospect Heights, where the median building has 10. Its 1903 construction date sits close to the 1915 median for stabilized buildings tracked in the neighborhood. HPD lists no open violations at this address — one of 46 such buildings among the 263 this site tracks in the neighborhood.
Building details
| Borough | Brooklyn |
| Neighborhood | Prospect Heights |
| ZIP | 11217 |
| Year built | 1903 |
| Apartments | 8 |
| Rent-stabilized | Yes — DHCR registered |
| Stabilization code | MULTIPLE DWELLING A |
| BBL | 3011570010 |
Owner & management
| Owner | 150 SIXTH AVE CORP 321 FLATBUSH AVE · BROOKLYN, NY 11217 |
| Managing agent | 150 SIXTH AVE REALTY LLC |
Building conditions
| HPD violations | 0 open / 1 total |
| HPD registration last filed | September 11, 2025 |
Full building report — $9
Frequently asked questions
Is 321 Flatbush Ave rent stabilized?
321 Flatbush Ave in Prospect Heights, Brooklyn is registered as rent stabilized in the New York State DHCR 2024 rent-stabilized building files, where its stabilization code is MULTIPLE DWELLING A. Registration is recorded for the building, not for each apartment in it, so an individual unit here can still have been deregulated — ask the landlord or DHCR for that apartment's rent history before relying on it.
How many apartments are at 321 Flatbush Ave?
321 Flatbush Ave (BBL 3011570010) has about 8 residential apartments and was built in 1903, from NYC PLUTO. PLUTO counts the building's units; it does not say how many of them are rent stabilized.