400 West 23 Street, Manhattan
A 1920 elevator apartment building on West 23 Street with 20 residential units on record, zoned C1-6A.
400 West 23 Street is an elevator apartment building in Manhattan, New York City (BBL 1007200047). The property is zoned C1-6A, on a 5,431 sq ft lot, with 6 floors and 20 residential units. It was built in 1920. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 1 open building violation for this lot as of 2026-07-05.
Property facts
| BBL | 1007200047 |
|---|---|
| Borough | Manhattan — Community District 4 |
| Neighborhood | Chelsea-Hudson Yards |
| ZIP code | 10011 |
| Zoning district | C1-6A |
| Building class | D4 — elevator apartment building (what’s a building class?) |
| Land use | 03 — Multi-family elevator buildings |
| Lot area | 5,431 sq ft |
| Floors | 6 |
| Residential units | 20 |
| Year built | 1920 |
| FAR | 4.35 built · 4 max residential · 2 max commercial Learn: What is FAR? |
| Flood zone | Not in a FEMA Special Flood Hazard Area |
Public records
- 1 open Department of Buildings violation
- 0 open ECB (OATH) violations
- 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)
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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.