# 309 West 21st Street, Manhattan

Apartment building · 16 units · built c. 1900 · Block 745, Lot 29.

On Umarelli: https://umarelli.org/nyc/1007450029/309-west-21-street

More construction in Chelsea: https://umarelli.org/nyc/manhattan/chelsea.md

Every lot on block 745: https://umarelli.org/nyc/manhattan/745.md

## 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.

From New York City and Jersey City public records, refreshed within a day of each release. Sources: https://umarelli.org/sources. Methodology and corrections: https://umarelli.org/methodology