764 Union Street, Brooklyn

Four-family · built c. 1920 · Block 957, Lot 9.

Building permits

Property taxes

Assessment
$1,696,050
2026–27 tax
$14,205
Market value (city estimate)
$3,769,000
Taxable value
$114,200
Assessed land
$454,500
Assessed improvements
$1,241,550

Zoning

R6A: floor area ratio 2.82 built, 3.00 allowed by base zoning.

Flood zone

Current FEMA flood map: zone X, minimal flood hazard.

Recent sales

Open-market sales since 2016, from the Department of Finance’s sales files.

More construction in Park Slope

Every lot on block 957

Umarelli: construction in New York City and Jersey City