1645 1 Avenue, Manhattan
A 1910 residential care facility on 1 Avenue carrying 6.8 FAR of unused residential development rights on record under its C2-8A zoning.
1645 1 Avenue is a residential care facility in Manhattan, New York City (BBL 1015480027). The property is zoned C2-8A, on a 1,875 sq ft lot, with 4 floors and 38 residential units. It was built in 1910. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 38 open building violations for this lot as of 2026-07-05.
Property facts
| BBL | 1015480027 |
|---|---|
| Borough | Manhattan — Community District 8 |
| Neighborhood | Upper East Side-Yorkville |
| ZIP code | 10028 |
| Zoning district | C2-8A |
| Building class | N9 — residential care facility (what’s a building class?) |
| Land use | 08 — Public facilities & institutions |
| Lot area | 1,875 sq ft |
| Floors | 4 |
| Residential units | 38 |
| Year built | 1910 |
| FAR | 3.2 built · 10 max residential · 2 max commercial Learn: What is FAR? |
| Flood zone | Not in a FEMA Special Flood Hazard Area |
Public records
- 14 open Department of Buildings violations
- 14 open ECB (OATH) violations — $2,450 in penalties due
- 10 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.