323 East 91 Street, Manhattan

A 1903 educational facility on East 91 Street with 10 open violations on record across city enforcement files.

323 East 91 Street is an educational facility in Manhattan, New York City (BBL 1015540015). The property is zoned R8B, on a 10,070 sq ft lot, with 6 floors and 1 residential units. It was built in 1903. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 10 open building violations for this lot as of 2026-07-05.

Property facts

BBL	1015540015
Borough	Manhattan — Community District 8
Neighborhood	Upper East Side-Yorkville
ZIP code	10128
Zoning district	R8B
Building class	W2 — educational facility (what’s a building class?)
Land use	08 — Public facilities & institutions
Lot area	10,070 sq ft
Floors	6
Residential units	1
Year built	1903
FAR	4.36 built · 4 max residential · 0 max commercial Learn: What is FAR?
Flood zone	Not in a FEMA Special Flood Hazard Area

Public records

6 open Department of Buildings violations
4 open ECB (OATH) violations — $5,000 in penalties due
0 open Housing Preservation & Development violations
Façade safety filing status: UNFILED

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.