Is 399 6th Ave rent stabilized?
399 6th Ave is a registered NYC rent-stabilized building in Park Slope, Brooklyn (11215). It has about 16 apartments, built in 1923.
Also written as 399 6th Avenue — or 399 6th Ave, Brooklyn, NY 11215.
How this building compares
With about 16 apartments it is larger than 80% of the 623 rent-stabilized buildings this site tracks in Park Slope. Its 1923 construction date sits close to the 1920 median for stabilized buildings tracked in the neighborhood. HPD lists 2 open violations here, about one for every 8 apartments — below the one for every 4 apartments median for tracked buildings in the neighborhood. Of the 25 violations on record at the address, 5 are class C — HPD's immediately hazardous grade, and 1 of them is still open. Tenants have filed 68 HPD complaints at the address, 11 of them in the last twelve months.
Building details
| Borough | Brooklyn |
| Neighborhood | Park Slope |
| ZIP | 11215 |
| Year built | 1923 |
| Apartments | 16 |
| Rent-stabilized | Yes — DHCR registered |
| Stabilization code | MULTIPLE DWELLING A |
| BBL | 3009950005 |
Owner & management
| Owner | 399 6TH AVE CORP 839 WILLOWBROOK ROAD · Staten Island, NY 10314 |
| Managing agent | 399 6TH AVE CORP. |
Building conditions
| HPD violations | 2 open / 25 total |
| HPD complaints | 1 open / 68 total |
| HPD registration last filed | August 28, 2025 |
Full building report — $9
Frequently asked questions
Is 399 6th Ave rent stabilized?
399 6th Ave in Park Slope, 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 399 6th Ave?
399 6th Ave (BBL 3009950005) has about 16 residential apartments and was built in 1923, from NYC PLUTO. PLUTO counts the building's units; it does not say how many of them are rent stabilized.