423 West 144 Street, Manhattan

A 1898 walk-up apartment building on West 144 Street with 15 open violations on record across city enforcement files.

423 West 144 Street is a walk-up apartment building in Manhattan, New York City (BBL 1020500155). The property is zoned R6A, on a 1,898 sq ft lot, with 4 floors and 4 residential units. It was built in 1898. 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	1020500155
Borough	Manhattan — Community District 9
Neighborhood	Hamilton Heights-Sugar Hill
ZIP code	10031
Zoning district	R6A
Building class	C3 — walk-up apartment building (what’s a building class?)
Land use	02 — Multi-family walk-up buildings
Lot area	1,898 sq ft
Floors	4
Residential units	4
Year built	1898
FAR	2.08 built · 3 max residential · 0 max commercial Learn: What is FAR?
Historic district	Hamilton Heights Historic District
Flood zone	Not in a FEMA Special Flood Hazard Area

Public records

0 open Department of Buildings violations
5 open ECB (OATH) violations — $37,500 in penalties due
10 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.