666 5th Avenue, Brooklyn

Commercial · built c. 1931 · Block 637, Lot 48.

Building permits

Property taxes

Assessment
$384,300
2026–27 tax
$30,998
Market value (city estimate)
$854,000
Taxable value
$285,750
Assessed land
$36,000
Assessed improvements
$348,300

Tax breaks

Zoning

R6A: floor area ratio 1.97 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 Sunset Park

Every lot on block 637

Umarelli: construction in New York City and Jersey City