5923 21st Avenue, Brooklyn

Single family · built 1940 · Block 5515, Lot 1.

Building permits

No building permits on file for this lot.

Property taxes

Assessment
$135,180
2026–27 tax
$12,097
Market value (city estimate)
$2,253,000
Taxable value
$60,964
Assessed land
$13,020
Assessed improvements
$122,160

Zoning

R5: floor area ratio 1.53 built, above the 1.50 base zoning allows, which bonuses, transfers or older rules can permit.

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 5515

Umarelli: construction in New York City and Jersey City