251 Park Avenue South, Manhattan

A 1910 office building on Park Avenue South with 17 residential units on record, zoned C6-4A.

251 Park Avenue South is an office building in Manhattan, New York City (BBL 1008760001). The property is zoned C6-4A, on a 6,210 sq ft lot, with 16 floors and 17 residential units. It was built in 1910. 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	1008760001
Borough	Manhattan — Community District 5
Neighborhood	Gramercy
ZIP code	10010
Zoning district	C6-4A
Building class	O6 — office building (what’s a building class?)
Land use	05 — Commercial & office buildings
Lot area	6,210 sq ft
Floors	16
Residential units	17
Year built	1910
FAR	16.65 built · 10 max residential · 10 max commercial Learn: What is FAR?
Flood zone	Not in a FEMA Special Flood Hazard Area

Public records

6 open Department of Buildings violations
2 open ECB (OATH) violations
0 open Housing Preservation & Development violations
Façade safety filing status: SWARMP (latest filing 2022-02-10)

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.