21 Butler Place, Brooklyn
A 1915 walk-up apartment building on Butler Place carrying 2.82 FAR of unused residential development rights on record under its R8X zoning.
21 Butler Place is a walk-up apartment building in Brooklyn, New York City (BBL 3011700037). The property is zoned R8X, on a 5,620 sq ft lot, with 4 floors and 23 residential units. It was built in 1915. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 41 open building violations for this lot as of 2026-07-05.
Property facts
| BBL | 3011700037 |
|---|---|
| Borough | Brooklyn — Community District 8 |
| Neighborhood | Prospect Heights |
| ZIP code | 11238 |
| Zoning district | R8X |
| Building class | C6 — walk-up apartment building (what’s a building class?) |
| Land use | 02 — Multi-family walk-up buildings |
| Lot area | 5,620 sq ft |
| Floors | 4 |
| Residential units | 23 |
| Year built | 1915 |
| FAR | 3.2 built · 6.02 max residential · 0 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
- 40 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.