# 433 West 21st Street, Manhattan

Apartment building · 69 units · built c. 1930 · Block 719, Lot 20.

On Umarelli: https://umarelli.org/nyc/1007190020/433-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 Jul 14, 2025, estimated cost $9K, described as “Installation of pipe scaffolding as per plans. All equipment shall comply with ch #33 of the NYC code 2022. No change in use, occupancy or egress under this application.”
- Alteration, filed May 5, 2025, estimated cost $9K, described as “Installation of 300PSF sidewalk shed as per plans. All equipment shall comply with ch #33 of the NYC code 2022. No change in use, occupancy or egress under this application.”
- Alteration, filed Apr 22, 2025, described as “Suspended scaffold out rigger installation for Facade restoration works and inspections.”
- Alteration, filed Mar 12, 2025, estimated cost $398K, described as “Masonry Facade repairs as per plans.No change to use, occupancy, or egress.”
- Alteration, filed Oct 17, 2023, estimated cost $15K, described as “Create 2 interior closets”
- Alteration, filed Sep 7, 2023, estimated cost $9K, described as “Installation of pipe scaffolding as per plans. All equipment shall comply with ch #33 of the NYC code 2022. No change in use, occupancy or egress under this application.”
- Alteration, filed Apr 17, 2019, estimated cost $8K, described as “Proposed installation of pipe scaffold for remedial repairs as per plans. No change in use occupancy or egress under this application.”

## Property taxes

- Assessment: $6,962,850
- 2026–27 tax: $834,304
- Market value (city estimate): $15,473,000
- Taxable value: $6,707,160
- Assessed land: $341,550
- Assessed improvements: $6,621,300

## Zoning

R7B: floor area ratio 7.63 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. FEMA’s preliminary map: zone X, moderate risk: a 0.2% chance of flooding each year.

## Landmarks

Part of Chelsea Historic District (Historic District). 31 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