5706 21st Avenue, Brooklyn

Two-family · built c. 1925 · Block 5500, Lot 41.

Building permits

Property taxes

Assessment
$117,900
2026–27 tax
$8,804
Market value (city estimate)
$1,965,000
Taxable value
$44,369
Assessed land
$22,020
Assessed improvements
$95,880

Zoning

R5: floor area ratio 0.60 built, 1.50 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 Borough Park

Every lot on block 5500

Umarelli: construction in New York City and Jersey City