427 West 21st Street, Manhattan
Co-op · 5 units · built c. 1853 · Block 719, Lot 25.
Building permits
- Alteration, filed Mar 14, 2025, estimated cost $87K, described as “Interior renovation of exist first floor apt. no change to use/egress/occupancy/yards/bulk/energy efficiency/accessibility/fire resistance ratings proposed under this application”
Property taxes
- Assessment
- $1,086,300
- 2026–27 tax
- $68,157
- Market value (city estimate)
- $2,414,000
- Taxable value
- $547,931
- Assessed land
- $342,450
- Assessed improvements
- $743,850
Zoning
R7B: floor area ratio 2.27 built, 3.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard. FEMA’s preliminary map: zone X, moderate risk: a 0.2% chance of flooding each year.
Recent sales
- Nov 25, 2024: $1,325,000
Open-market sales since 2016, from the Department of Finance’s sales files.
Landmarks
Part of Chelsea Historic District (Historic District). 8 Landmarks Preservation Commission permits are on file.