445 12 Street, Brooklyn

A 1909 elevator apartment building in the Park Slope Historic District Extension historic district, on 12 Street, zoned R6B.

445 12 Street is an elevator apartment building in Brooklyn, New York City (BBL 3010960050). The property is zoned R6B, on a 8,500 sq ft lot, with 5 floors and 36 residential units. It was built in 1909. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 5 open building violations for this lot as of 2026-07-05.

Property facts

BBL	3010960050
Borough	Brooklyn — Community District 6
Neighborhood	Park Slope
Zoning district	R6B
Building class	D4 — elevator apartment building (what’s a building class?)
Land use	03 — Multi-family elevator buildings
Lot area	8,500 sq ft
Floors	5
Residential units	36
Year built	1909
FAR	5 built · 2 max residential · 0 max commercial Learn: What is FAR?
Historic district	Park Slope Historic District Extension
Flood zone	Not in a FEMA Special Flood Hazard Area

Public records

4 open Department of Buildings violations
1 open ECB (OATH) violation — $625 in penalties due
0 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.