421 West 20th Street, Manhattan

Seminary · built c. 1892 · Block 718, Lot 97.

Building permits

No building permits on file for this lot.

Property taxes

Assessment
$779,850
2026–27 tax
$80,654
Market value (city estimate)
$1,733,000
Taxable value
$743,490
Assessed land
$271,800
Assessed improvements
$508,050

Zoning

R7B: floor area ratio 1.74 built, 3.00 allowed by base zoning.

Flood zone

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

Landmarks

Part of Chelsea Historic District (Historic District). 4 Landmarks Preservation Commission permits are on file.

More construction in Chelsea

Every lot on block 718

Umarelli: construction in New York City and Jersey City