18 West 23rd Street, Manhattan

Mixed use · 3 units · built c. 1857 · Block 824, Lot 49.

Building permits

Property taxes

Assessment
$1,204,200
2026–27 tax
$98,452
Market value (city estimate)
$2,676,000
Taxable value
$907,560
Assessed land
$315,000
Assessed improvements
$889,200

Zoning

C6-4M: floor area ratio 5.72 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). 27 Landmarks Preservation Commission permits are on file.

Board and land use applications

More construction in Flatiron

Every lot on block 824

Umarelli: construction in New York City and Jersey City