Is 633 Union St rent stabilized?
633 Union St is a registered NYC rent-stabilized building in Carroll Gardens-Cobble Hill-Gowanus-Red Hook, Brooklyn (11215). It has about 8 apartments, built in 1931.
Also written as 633 Union Street — or 633 Union St, Brooklyn, NY 11215.
How this building compares
With about 8 apartments it sits near the middle of the 392 rent-stabilized buildings this site tracks in Carroll Gardens-Cobble Hill-Gowanus-Red Hook, where the median building has 8. Its 1931 construction date sits close to the 1920 median for stabilized buildings tracked in the neighborhood. HPD lists 5 open violations here, about 0.6 per apartment — above the one for every 4 apartments median for tracked buildings in the neighborhood. Of the 94 violations on record at the address, 16 are class C — HPD's immediately hazardous grade. Tenants have filed 17 HPD complaints at the address, 5 of them in the last twelve months.
Building details
| Borough | Brooklyn |
| Neighborhood | Carroll Gardens-Cobble Hill-Gowanus-Red Hook |
| ZIP | 11215 |
| Year built | 1931 |
| Apartments | 8 |
| Rent-stabilized | Yes — DHCR registered |
| Stabilization code | MULTIPLE DWELLING A |
| BBL | 3004340056 |
Owner & management
| Owner | ADDA 633 UNION ST LLC 406 FIFTH AVE #181 · BROOKLYN, NY 11215 |
| Managing agent | Myriam Nachimovsky |
Building conditions
| HPD violations | 5 open / 94 total · 4 in last 12 mo |
| HPD complaints | 0 open / 17 total |
| HPD registration last filed | August 28, 2025 |
Full building report — $9
Other rent-stabilized buildings in Carroll Gardens-Cobble Hill-Gowanus-Red Hook
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