356 West 21st Street, Manhattan
Apartment building · 5 units · built 1940 · Block 744, Lot 70.
Building permits
- Alteration, filed Oct 22, 2026, estimated cost $24K, described as “Interior renovation of apt 5. Partition changes to non-load-bearing walls as per plans. No change in use, occupancy, or egress.”
- Alteration, filed Jan 8, 2026, estimated cost $117K, described as “Interior renovation of apt 2, 3, and 4. Partition changes to non-load-bearing walls as per plans. No change in use, occupancy, or egress.”
Property taxes
- Assessment
- $2,342,700
- 2026–27 tax
- $88,079
- Market value (city estimate)
- $5,206,000
- Taxable value
- $708,089
- Assessed land
- $810,000
- Assessed improvements
- $1,532,700
Zoning
C2-6A: floor area ratio 3.57 built, 4.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Oct 8, 2025: $5,000,000
Open-market sales since 2016, from the Department of Finance’s sales files.