309 West 21st Street, Manhattan
Apartment building · 16 units · built c. 1900 · Block 745, Lot 29.
Building permits
- Alteration, filed Dec 29, 2023, estimated cost $26K, described as “Alteration type 2. Renovation in one unit of an existing multi family walk-up building. Alteration type 2 work includes: interior partition work, plumbing, finishes. No change of use, egress, or occupancy. No exterior work under this…”
Property taxes
- Assessment
- $1,122,750
- 2026–27 tax
- $127,754
- Market value (city estimate)
- $2,495,000
- Taxable value
- $1,027,040
- Assessed land
- $149,850
- Assessed improvements
- $972,900
Zoning
R7B: floor area ratio 3.75 built, above the 3.00 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.