Is 673 Union St rent stabilized?
673 Union St is a registered NYC rent-stabilized building in Park Slope, Brooklyn (11215). It has about 8 apartments, built in 1920.
Also written as 673 Union Street — or 673 Union St, Brooklyn, NY 11215.
How this building compares
With about 8 apartments it sits near the middle of the 623 rent-stabilized buildings this site tracks in Park Slope, where the median building has 8. Its 1920 construction date sits close to the 1920 median for stabilized buildings tracked in the neighborhood. HPD lists 72 open violations here, about 9.0 per apartment — above the one for every 4 apartments median for tracked buildings in the neighborhood. Of the 86 violations on record at the address, 2 are class C — HPD's immediately hazardous grade. Tenants have filed 52 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 | 8 |
| Rent-stabilized | Yes — DHCR registered |
| Stabilization code | MULTIPLE DWELLING A, GARDEN COMPLEX |
| BBL | 3009520069 |
Owner & management
| Owner | PHILIP DELDUCA 85 COLUMBUS AVE · STATEN ISLAND, NY 10304 |
| Managing agent | ELIZa DELDUCa |
Building conditions
| HPD violations | 72 open / 86 total · 1 in last 12 mo |
| HPD complaints | 0 open / 52 total |
| HPD registration last filed | October 23, 2025 |