Is 857 Union St rent stabilized?
857 Union St is a registered NYC rent-stabilized building in Park Slope, Brooklyn (11215). It has about 12 apartments, built in 1920.
Also written as 857 Union Street — or 857 Union St, Brooklyn, NY 11215.
How this building compares
With about 12 apartments it is larger than 76% of the 623 rent-stabilized buildings this site tracks in Park Slope. Its 1920 construction date sits close to the 1920 median for stabilized buildings tracked in the neighborhood. HPD lists 1 open violation here, about one for every 12 apartments — below the one for every 4 apartments median for tracked buildings in the neighborhood. Of the 56 violations on record at the address, 1 is class C — HPD's immediately hazardous grade. Tenants have filed 10 HPD complaints at the address, none of them in the last twelve months.
Building details
| Borough | Brooklyn |
| Neighborhood | Park Slope |
| ZIP | 11215 |
| Year built | 1920 |
| Apartments | 12 |
| Rent-stabilized | Yes — DHCR registered |
| Stabilization code | MULTIPLE DWELLING B |
| BBL | 3010630001 |
Owner & management
| Owner | 857 UNION STREET MANAGEMENT LLC 215 LEXINGTON AVE #20 · New York, NY 10016 |
| Managing agent | CANVAS PROPERTY GROUP |
Building conditions
| HPD violations | 1 open / 56 total · 1 in last 12 mo |
| HPD complaints | 0 open / 10 total |
| HPD registration last filed | October 7, 2025 |
Full building report — $9
Frequently asked questions
Is 857 Union St rent stabilized?
857 Union St in Park Slope, Brooklyn is registered as rent stabilized in the New York State DHCR 2024 rent-stabilized building files. 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 857 Union St?
857 Union St (BBL 3010630001) has about 12 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, and the DHCR files this site is built on register the building rather than its individual apartments.