5 West 21st Street, Manhattan

Apartment building · 4 units · built c. 1851 · Block 823, Lot 35.

Building permits

No building permits on file for this lot.

Property taxes

Assessment
$1,570,500
2026–27 tax
$112,791
Market value (city estimate)
$3,490,000
Taxable value
$906,749
Assessed land
$1,068,750
Assessed improvements
$501,750

Zoning

C6-4A: floor area ratio 3.06 built, 10.00 allowed by base zoning.

Flood zone

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

Landmarks

Part of Ladies' Mile Historic District (Historic District). 37 Landmarks Preservation Commission permits are on file.

Board and land use applications

More construction in Flatiron

Every lot on block 823

Umarelli: construction in New York City and Jersey City