17 South William Street, Manhattan
A 1838 mixed residential and commercial building on South William Street carrying 10 FAR of unused commercial development rights on record under its C5-5 zoning.
17 South William Street is a mixed residential and commercial building in Manhattan, New York City (BBL 1000290047). The property is zoned C5-5, on a 1,738 sq ft lot, with 5.5 floors and 6 residential units. It was built in 1838. The lot is not inside a FEMA Special Flood Hazard Area.
Property facts
| BBL | 1000290047 |
|---|---|
| Borough | Manhattan — Community District 1 |
| Neighborhood | Financial District-Battery Park City |
| ZIP code | 10004 |
| Zoning district | C5-5 |
| Building class | S9 — mixed residential and commercial building (what’s a building class?) |
| Land use | 04 — Mixed residential & commercial buildings |
| Lot area | 1,738 sq ft |
| Floors | 5.5 |
| Residential units | 6 |
| Year built | 1838 |
| FAR | 5 built · 10 max residential · 15 max commercial Learn: What is FAR? |
| Historic district | Stone Street Historic District |
| Flood zone | Not in a FEMA Special Flood Hazard Area |
Public records
No open violations on record for this lot.
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.