Is 770 Union St rent stabilized?
770 Union St is a registered NYC rent-stabilized building in Park Slope, Brooklyn (11215). It has about 9 apartments, built in 1920.
Also written as 770 Union Street — or 770 Union St, Brooklyn, NY 11215.
How this building compares
With about 9 apartments it is larger than 67% of the 623 rent-stabilized buildings this site tracks in Park Slope. HPD lists 28 open violations here, about 3.1 per apartment — above the one for every 4 apartments median for tracked buildings in the neighborhood. Of the 57 violations on record at the address, 17 are class C — HPD's immediately hazardous grade, and 9 of them are still open. HPD issued 4 new violations at the address in the last twelve months. Tenants have filed 180 HPD complaints at the address, 4 of them in the last twelve months.
Building details
| Borough | Brooklyn |
| Neighborhood | Park Slope |
| ZIP | 11215 |
| Year built | 1920 |
| Apartments | 9 |
| Rent-stabilized | Yes — DHCR registered |
| Stabilization code | MULTIPLE DWELLING A |
| BBL | 3009570013 |
Owner & management
| Owner | 770 UNION STR LTD PARTNERSHIP 917 8TH AVENUE · Brooklyn, NY 11215 |
| Managing agent | KOTSONIS ORGANIZATION LLC. |
Building conditions
| HPD violations | 28 open / 57 total · 4 in last 12 mo |
| HPD complaints | 0 open / 180 total |
| HPD registration last filed | October 11, 2025 |
Full building report — $9
Frequently asked questions
Is 770 Union St rent stabilized?
770 Union St 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 770 Union St?
770 Union St (BBL 3009570013) has about 9 residential apartments and was built in 1920, from NYC PLUTO. PLUTO counts the building's units; it does not say how many of them are rent stabilized.