473 West 21st Street, Manhattan
Single family · built c. 1853 · Block 719, Lot 1.
Building permits
- Alteration, filed Oct 3, 2025, estimated cost $1K, described as “Proposed installation of temporary pipe scaffold as per plans. Work shall comply with chapter #33 of 2022 the NYC building code. No change in use, occupancy, or egress under this application.”
- Alteration, filed Oct 3, 2025, estimated cost $1K, described as “Installation of temporary heavy duty sidewalk shed as per plans. No change in use, egress or occupancy. Sidewalk shed shall comply with chapter #33 of 2022 the NYC building code. Live load 300PSF.”
Property taxes
- Assessment
- $379,440
- 2026–27 tax
- $55,346
- Market value (city estimate)
- $6,324,000
- Taxable value
- $278,921
- Assessed land
- $255,060
- Assessed improvements
- $124,380
Zoning
R7B: floor area ratio 2.80 built, 3.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone AE, high risk: a 1% chance of flooding each year, base flood elevation 10 ft (NGVD29). FEMA’s preliminary map: zone AE, high risk: a 1% chance of flooding each year, base flood elevation 11 ft (NAVD88).
Landmarks
Part of Chelsea Historic District (Historic District). 16 Landmarks Preservation Commission permits are on file.