27 West 23 Street, Manhattan
A 1881 educational facility on West 23 Street carrying 5.9 FAR of unused commercial development rights on record under its M1-8A/R11 zoning.
27 West 23 Street is an educational facility in Manhattan, New York City (BBL 1008250024). The property is zoned M1-8A/R11, on a 16,650 sq ft lot, with 6 floors and 7 residential units. It was built in 1881. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 4 open building violations for this lot as of 2026-07-05.
Property facts
| BBL | 1008250024 |
|---|---|
| Borough | Manhattan — Community District 5 |
| Neighborhood | Midtown South-Flatiron-Union Square |
| ZIP code | 10010 |
| Zoning district | M1-8A/R11 |
| Building class | W9 — educational facility (what’s a building class?) |
| Land use | 08 — Public facilities & institutions |
| Lot area | 16,650 sq ft |
| Floors | 6 |
| Residential units | 7 |
| Year built | 1881 |
| FAR | 6.1 built · 12 max residential · 12 max commercial Learn: What is FAR? |
| Historic district | Ladies' Mile Historic District |
| Flood zone | Not in a FEMA Special Flood Hazard Area |
Public records
- 3 open Department of Buildings violations
- 1 open ECB (OATH) violation
- 0 open Housing Preservation & Development violations
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)
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.