433 West 21st Street, Manhattan

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

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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.”

R7B: floor area ratio 7.63 built, above the 3.00 base zoning allows, which bonuses, transfers or older rules can permit.

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.

Part of Chelsea Historic District (Historic District). 31 Landmarks Preservation Commission permits are on file.