421 Remsen Avenue, Brooklyn

A 1965 walk-up apartment building on Remsen Avenue with 38 open violations on record across city enforcement files.

421 Remsen Avenue is a walk-up apartment building in Brooklyn, New York City (BBL 3046650067). The property is zoned R6, on a 7,000 sq ft lot, with 3 floors and 15 residential units. It was built in 1965. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 38 open building violations for this lot as of 2026-07-05.

Property facts

BBL	3046650067
Borough	Brooklyn — Community District 17
Neighborhood	East Flatbush-Remsen Village
ZIP code	11212
Zoning district	R6
Building class	C1 — walk-up apartment building (what’s a building class?)
Land use	02 — Multi-family walk-up buildings
Lot area	7,000 sq ft
Floors	3
Residential units	15
Year built	1965
FAR	1.54 built · 2.43 max residential · 0 max commercial Learn: What is FAR?
Flood zone	Not in a FEMA Special Flood Hazard Area

Public records

10 open Department of Buildings violations
8 open ECB (OATH) violations — $168,750 in penalties due
20 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.