451 West 21st Street, Manhattan
Single family · built c. 1857 · Block 719, Lot 12.
Building permits
- Alteration, filed Jan 14, 2022, estimated cost $57K, described as “Plumbing Work filed in conjunction with renovation of existing 1 Family Residence. Install Plumbing Fixtures and related piping.”
- Alteration, filed Jan 13, 2022, estimated cost $514K, described as “Renovate Existing 1 Family Residence. Demolish and Construct Interior Partitions, Finishes, Doors, Cabinetry. Interior Renovations at Cellar and Floors 1-4. Install Split A/C System. Window Replacement.”
Property taxes
- Assessment
- $525,720
- 2026–27 tax
- $71,180
- Market value (city estimate)
- $8,762,000
- Taxable value
- $358,716
- Assessed land
- $176,580
- Assessed improvements
- $349,140
Zoning
R7B: floor area ratio 2.68 built, 3.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, moderate risk: a 0.2% chance of flooding each year.
Recent sales
- Apr 1, 2021: $5,900,000
Open-market sales since 2016, from the Department of Finance’s sales files.
Landmarks
Part of Chelsea Historic District (Historic District). 6 Landmarks Preservation Commission permits are on file.