100 East 123 Street, Manhattan
A 1920 walk-up apartment building on East 123 Street carrying 6.98 FAR of unused commercial development rights on record under its M1-6/R10 zoning.
100 East 123 Street is a walk-up apartment building in Manhattan, New York City (BBL 1017710072). The property is zoned M1-6/R10, on a 2,027 sq ft lot, with 4 floors and 10 residential units. It was built in 1920. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 29 open building violations for this lot as of 2026-07-05.
Property facts
| BBL | 1017710072 |
|---|---|
| Borough | Manhattan — Community District 11 |
| Neighborhood | East Harlem (North) |
| ZIP code | 10035 |
| Zoning district | M1-6/R10 |
| Building class | C1 — walk-up apartment building (what’s a building class?) |
| Land use | 02 — Multi-family walk-up buildings |
| Lot area | 2,027 sq ft |
| Floors | 4 |
| Residential units | 10 |
| Year built | 1920 |
| FAR | 3.02 built · 10 max residential · 10 max commercial Learn: What is FAR? |
| Flood zone | Not in a FEMA Special Flood Hazard Area |
Public records
- 17 open Department of Buildings violations
- 2 open ECB (OATH) violations
- 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.