Greenburgh, NY Environmental Rules: Flood Zones (2026)

L. No. 9-2007 and covers all areas of special flood hazard identified on the Town's FEMA panels (Community Number 360911, FIRM effective September 28, 2007) plus later Letters of Map Revision for the Saw Mill River corridor. Section 220-4 designates the Town Engineer as local administrator and makes it unlawful to undertake development, including manufactured home and recreational vehicle parks, subdivisions and watercourse alterations, in a special flood hazard area without a valid floodplain development permit. Applications must show elevations, dimensions, drainage facilities and material storage, and must be accompanied by a $250 fee; the administrator may also require a deposit of up to $500 to cover extra review, inspection and approval costs.

Applicants for structures with basements or lowest floors in Zones A1-A30, AE or AH must submit as-built elevation certificates from a licensed engineer or surveyor once the lowest floor is complete, and nonresidential floodproofing requires a certified floodproofing elevation. The local administrator reviews for compliance with the construction standards in § 220-5, can require technical analyses showing a project will not damage neighboring property, notifies FEMA and the state DEC before any watercourse alteration, and issues stop-work orders for unpermitted or noncompliant work. Occupancy of any flood-hazard structure is unlawful until the administrator issues a certificate of compliance based on inspections and submitted elevation or floodproofing certificates.