309 5th Avenue, Brooklyn

Three-family with store · built c. 1920 · Block 975, Lot 4.

Building permits

Property taxes

Assessment
$1,349,100
2026–27 tax
$17,428
Market value (city estimate)
$2,998,000
Taxable value
$140,109
Assessed land
$136,350
Assessed improvements
$1,212,750

Zoning

R6A: floor area ratio 2.75 built, 3.00 allowed by base zoning.

Flood zone

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

More construction in Park Slope

Every lot on block 975

Umarelli: construction in New York City and Jersey City