Manhattan · BBL 1006930018
521 West 21st Street
New York, NY 10011 · Manhattan
Also written as: 521 W 21st St · 521 West 21st Street
Owner of record: CHELSEA OPERATING INC.
Snapshot updated 2026-09-02 — open the app to refresh for live data.
Assessment (FY2027)
- Assessed value: $9,220,500
- Market value: $20,490,000
- Tax class: 4
Building
- Store / retail (K2)
- Built 1931
- 0 residential / 7 units
- 2 floors
- Zoning: M1-5
- Lot area: 17,281 sf
- Building area: 34,600 sf
- Flood zone: 1
Official records
ZoLa zoning · DOF property tax · Property Portal · ACRIS deeds/mortgages · DOB profile · Tax map · Map
All data sourced from NYC Department of Finance / PLUTO / ACRIS / HPD public records. https://www.sageops.ai/property/manhattan/521-west-21-street-1006930018
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