20 Jay Street, Brooklyn

An office building on Jay Street inside a FEMA-mapped flood zone, built in 1909, zoned M1-4/R8A.

20 Jay Street is an office building in Brooklyn, New York City (BBL 3000190001). The property is zoned M1-4/R8A, on a 41,400 sq ft lot, with 11 floors and 240 residential units. It was built in 1909. The lot is 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	3000190001
Borough	Brooklyn — Community District 2
Neighborhood	Downtown Brooklyn-DUMBO-Boerum Hill
ZIP code	11201
Zoning district	M1-4/R8A
Building class	O6 — office building (what’s a building class?)
Land use	05 — Commercial & office buildings
Lot area	41,400 sq ft
Floors	11
Residential units	240
Year built	1909
FAR	12.08 built · 6.02 max residential · 2 max commercial Learn: What is FAR?
Historic district	DUMBO Historic District
Flood zone	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 2022-02-19)

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.