3521 Neptune Avenue, Brooklyn
Inside a FEMA-mapped flood zone, this elevator apartment building on Neptune Avenue carries 0.22 FAR of unused residential development rights on record.
3521 Neptune Avenue is an elevator apartment building in Brooklyn, New York City (BBL 3069790100). The property is zoned R6, on a 165,454 sq ft lot, with 24 floors and 335 residential units. It was built in 1974. The lot is inside a FEMA Special Flood Hazard Area. NYC municipal records show 136 open building violations for this lot as of 2026-07-05.
Property facts
| BBL | 3069790100 |
|---|---|
| Borough | Brooklyn — Community District 13 |
| Neighborhood | Coney Island-Sea Gate |
| Zoning district | R6 |
| Building class | D6 — elevator apartment building (what’s a building class?) |
| Land use | 04 — Mixed residential & commercial buildings |
| Lot area | 165,454 sq ft |
| Floors | 24 |
| Residential units | 335 |
| Year built | 1974 |
| FAR | 2.21 built · 2.43 max residential · 0 max commercial Learn: What is FAR? |
| Flood zone | In a FEMA Special Flood Hazard Area |
Public records
- 11 open Department of Buildings violations
- 0 open ECB (OATH) violations
- 125 open Housing Preservation & Development violations
- Façade safety filing status: SAFE (latest filing 2022-12-06)
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.