136 West 21 Street, Manhattan

A 1910 educational facility on West 21 Street with 13 residential units on record, zoned C6-3A.

136 West 21 Street is an educational facility in Manhattan, New York City (BBL 1007960060). The property is zoned C6-3A, on a 6,348 sq ft lot, with 12 floors and 13 residential units. It was built in 1910. The lot is not inside a FEMA Special Flood Hazard Area. NYC municipal records show 3 open building violations for this lot as of 2026-07-05.

Property facts

BBL	1007960060
Borough	Manhattan — Community District 4
Neighborhood	Chelsea-Hudson Yards
ZIP code	10011
Zoning district	C6-3A
Building class	W9 — educational facility (what’s a building class?)
Land use	08 — Public facilities & institutions
Lot area	6,348 sq ft
Floors	12
Residential units	13
Year built	1910
FAR	12.2 built · 7.52 max residential · 6 max commercial Learn: What is FAR?
Flood zone	Not in a FEMA Special Flood Hazard Area

Public records

2 open Department of Buildings violations
1 open ECB (OATH) violation
0 open Housing Preservation & Development violations
Façade safety filing status: SWARMP (latest filing 2024-12-09)

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.