747 Union Street, Brooklyn

Co-op · 4 units · built c. 1920 · Block 953, Lot 79.

Some of the city’s records for this lot were still loading when this page was made; it refreshes within minutes.

Building permits

Permit records are unavailable right now; the map lists them once the city responds.

Property taxes

Assessment
$1,540,800
2026–27 tax
$11,212
Market value (city estimate)
$3,424,000
Taxable value
$114,200
Assessed land
$10,350
Assessed improvements
$1,530,450

Tax breaks

Zoning

R6A: floor area ratio 2.53 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 953

Umarelli: construction in New York City and Jersey City