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. Tenants have filed 67 HPD complaints at the address, 10 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 | 0 open / 67 total |
| HPD registration last filed | August 28, 2025 |