439 Knickerbocker Avenue, Brooklyn
A 1931 condominium on Knickerbocker Avenue with 15 open violations on record across city enforcement files.
439 Knickerbocker Avenue is a condominium in Brooklyn, New York City (BBL 3032897501). The property is zoned C4-3, on a 5,000 sq ft lot, with 5 floors and 15 residential units. It was built in 1931. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 15 open building violations for this lot as of 2026-07-05.
Property facts
| BBL | 3032897501 |
|---|---|
| Borough | Brooklyn — Community District 4 |
| Neighborhood | Bushwick (West) |
| Zoning district | C4-3 |
| Building class | RM — condominium (what’s a building class?) |
| Land use | 04 — Mixed residential & commercial buildings |
| Lot area | 5,000 sq ft |
| Floors | 5 |
| Residential units | 15 |
| Year built | 1931 |
| FAR | 3.99 built · 2.43 max residential · 3.4 max commercial Learn: What is FAR? |
| Flood zone | Not in a FEMA Special Flood Hazard Area |
Public records
- 0 open Department of Buildings violations
- 0 open ECB (OATH) violations
- 15 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.