# 439 West 21st Street, Manhattan

Apartment building · 8 units · built c. 1853 · Block 719, Lot 19.

On Umarelli: https://umarelli.org/nyc/1007190019/439-west-21-street

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

Every lot on block 719: https://umarelli.org/nyc/manhattan/719.md

## Building permits

- Alteration, filed Nov 4, 2026, estimated cost $229K, described as “Interior renovation & conversion from 8-family to 3-family dwelling, no change to existing use/egress/yards/bulk proposed under this action”
- Alteration, filed Oct 20, 2020, estimated cost $21K, described as “Removal & Replacement of Plumbing Fixtures to Unit #1A as per plans filed herewith. No change to use, occupancy or egress.”

## Property taxes

- Assessment: $979,650
- 2026–27 tax: $79,394
- Market value (city estimate): $2,177,000
- Taxable value: $638,264
- Assessed land: $212,850
- Assessed improvements: $766,800

## Zoning

R7B: floor area ratio 2.28 built, 3.00 allowed by base zoning.

## Recent sales

- Aug 28, 2026: $5,600,000, 3,600 sq ft ($1,556 per sq ft)
- Sep 15, 2017: $5,720,000

Open-market sales since 2016, from the Department of Finance’s sales files.

## 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.

## Landmarks

Part of Chelsea Historic District (Historic District). 15 Landmarks Preservation Commission permits are on file.

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