15 West 21 Street, Manhattan
A 1910 office building on West 21 Street with 19 open violations on record across city enforcement files.
15 West 21 Street is an office building in Manhattan, New York City (BBL 1008230029). The property is zoned C6-4A, on a 11,200 sq ft lot, with 12 floors and 17 residential units. It was built in 1910. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 19 open building violations for this lot as of 2026-07-05.
Property facts
| BBL | 1008230029 |
|---|---|
| Borough | Manhattan — Community District 5 |
| Neighborhood | Midtown South-Flatiron-Union Square |
| ZIP code | 10010 |
| Zoning district | C6-4A |
| Building class | O6 — office building (what’s a building class?) |
| Land use | 05 — Commercial & office buildings |
| Lot area | 11,200 sq ft |
| Floors | 12 |
| Residential units | 17 |
| Year built | 1910 |
| FAR | 12.23 built · 10 max residential · 10 max commercial Learn: What is FAR? |
| Historic district | Ladies' Mile Historic District |
| Flood zone | Not in a FEMA Special Flood Hazard Area |
Public records
- 15 open Department of Buildings violations
- 4 open ECB (OATH) violations — $12,500 in penalties due
- 0 open Housing Preservation & Development violations
- Façade safety filing status: SWARMP (latest filing 2020-10-30)
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)
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Data: NYC municipal records (Departments of City Planning, Buildings, Finance) and FEMA. See our sources and methodology. Data as of 2026-07-11.