223 21st Street, Brooklyn

Four-family · built c. 1910 · Block 640, Lot 46.

Building permits

No building permits on file for this lot.

Property taxes

Assessment
$347,400
2026–27 tax
$10,628
Market value (city estimate)
$772,000
Taxable value
$85,441
Assessed land
$67,950
Assessed improvements
$279,450

Zoning

R6B: floor area ratio 0.93 built, 2.00 allowed by base zoning.

Flood zone

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

More construction in Sunset Park

Every lot on block 640

Umarelli: construction in New York City and Jersey City