531 West 21 Street, Manhattan
A warehouse on West 21 Street inside a FEMA-mapped flood zone, built in 1921, zoned M1-5.
531 West 21 Street is a warehouse in Manhattan, New York City (BBL 1006930014). The property is zoned M1-5, on a 12,261 sq ft lot, with 7 floors and 2 residential units. It was built in 1921. The lot is inside a FEMA Special Flood Hazard Area. NYC municipal records show 12 open building violations for this lot as of 2026-07-05.
Property facts
| BBL | 1006930014 |
|---|---|
| Borough | Manhattan — Community District 4 |
| Neighborhood | Chelsea-Hudson Yards |
| Zoning district | M1-5 |
| Building class | E7 — warehouse (what’s a building class?) |
| Land use | 06 — Industrial & manufacturing |
| Lot area | 12,261 sq ft |
| Floors | 7 |
| Residential units | 2 |
| Year built | 1921 |
| FAR | 7.47 built · 0 max residential · 5 max commercial Learn: What is FAR? |
| Flood zone | In a FEMA Special Flood Hazard Area |
Public records
- 10 open Department of Buildings violations
- 2 open ECB (OATH) violations
- 0 open Housing Preservation & Development violations
- Façade safety filing status: SAFE (latest filing 2023-10-09)
Violation counts as of 2026-07-05.
Absence of a record means none on file in NYC municipal records — not a certification of compliance.
The complete dossier also covers:
- Buildable floor area (residential & commercial)
- Recorded ownership & last sale
- Recorded mortgages & open debt stack
- LL97 carbon exposure by compliance period
- Flood coverage percentage & base flood elevation
- Climate projections for this lot
- Open permits & construction pipeline
- Distress signal convergence
- Air rights & transferable development rights
- Comparable sales (Pro)
Run a free lookupFree account — no card required
See plans & the one-time dossierWatch this propertyAlerts on new permits, violations & sales
Nearby on this block
Data: NYC municipal records (Departments of City Planning, Buildings, Finance) and FEMA. See our sources and methodology. Data as of 2026-07-11.