56 Nassau Street, Manhattan

An office building rising 27 floors on Nassau Street, built in 1986, zoned C5-5.

56 Nassau Street is an office building in Manhattan, New York City (BBL 1000670023). The property is zoned C5-5, on a 23,382 sq ft lot, with 27 floors and 7 residential units. It was built in 1986. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 4 open building violations for this lot as of 2026-07-05.

Property facts

BBL	1000670023
Borough	Manhattan — Community District 1
Neighborhood	Financial District-Battery Park City
Zoning district	C5-5
Building class	O4 — office building (what’s a building class?)
Land use	05 — Commercial & office buildings
Lot area	23,382 sq ft
Floors	27
Residential units	7
Year built	1986
FAR	23.88 built · 10 max residential · 15 max commercial Learn: What is FAR?
Flood zone	Not in a FEMA Special Flood Hazard Area

Public records

4 open Department of Buildings violations
0 open ECB (OATH) violations
0 open Housing Preservation & Development violations
Façade safety filing status: SAFE (latest filing 2023-02-20)

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.