123 5 Avenue, Manhattan

A 1850 office building on 5 Avenue carrying 5.36 FAR of unused commercial development rights on record under its C6-4M zoning.

123 5 Avenue is an office building in Manhattan, New York City (BBL 1008480003). The property is zoned C6-4M, on a 2,250 sq ft lot, with 5 floors and 5 residential units. It was built in 1850. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 8 open building violations for this lot as of 2026-07-05.

Property facts

BBL	1008480003
Borough	Manhattan — Community District 5
Neighborhood	Midtown South-Flatiron-Union Square
ZIP code	10003
Zoning district	C6-4M
Building class	O5 — office building (what’s a building class?)
Land use	05 — Commercial & office buildings
Lot area	2,250 sq ft
Floors	5
Residential units	5
Year built	1850
FAR	4.64 built · 10 max residential · 10 max commercial Learn: What is FAR?
Historic district	Ladies' Mile Historic District
Flood zone	Not in a FEMA Special Flood Hazard Area

Public records

8 open Department of Buildings violations
0 open ECB (OATH) violations
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.