Greenburgh, NY Environmental Rules: Erosion Control (2026)
Key Facts
- No exposed soil
- Dec 15 - Apr 15
- Temporary stabilization
- Within 2 days of final grade
- Permanent stabilization
- Within 15 days
- Reference standard
- Westchester Co. SWCD BMP Manual
- Chapter adopted
- 6-25-2003, L.L. No. 8-2003
- Standards amended
- 9-9-2015, L.L. No. 10-2015
Summary
Greenburgh's Steep Slopes law bars leaving disturbed slope soil bare and exposed between December 15 and April 15, and forces temporary erosion stabilization within two days of final grade and permanent stabilization within 15 days, enforced through the Planning Board's steep slope permit review.
Disturbance of slopes is undertaken in workable units so that the disturbance can be completed and stabilized in one construction season and so that areas are not left bare and exposed during the period from December 15 through April 15... Temporary soil stabilization, including, if appropriate, temporary stabilization measures such as netting or mulching to secure soil during the grow-in period, is applied to an area of disturbance within two days of establishing the final grade, and permanent stabilization is applied within 15 days of establishing the final grade;
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4570580; v39 updated 2025-10-22; through 10-22-2025).
Full Breakdown
L. No. L. No. 10-2015. Section 245-6A(12) requires every Planning Board steep slope permit application to include an erosion and sedimentation control plan, with installation details of proposed control measures, construction notations and a maintenance schedule, submitted alongside contour maps, cross sections and a soils analysis. Section 245-7A sets the substantive review standards the Planning Board and Town Engineer apply: disturbance of slopes must be undertaken in workable units so the work can be completed and stabilized within a single construction season, and areas cannot be left bare and exposed between December 15 and April 15.
Temporary soil stabilization, such as netting or mulching during the grow-in period, must be applied within two days of establishing final grade, with permanent stabilization following within 15 days, and any area not expected to reach final grade within 60 days must receive interim stabilization within two days of the initial disturbance. Erosion and sedimentation control measures must also be consistent with the Westchester County Soil and Water Conservation District's Best Management Practices Manual and the New York State DEC's Guidelines for Urban Erosion and Sediment Control.
Topsoil must be stockpiled and stabilized to minimize erosion and cannot be stockpiled on slopes steeper than 10%. The Town Engineer refers applications to the Planning Board, which requires notice to property owners within 500 feet before acting.
Violations & Fines
Undertaking steep slope activity without a permit, or violating any Chapter 245 requirement such as the erosion-control timelines, triggers a written stop-work order under § 245-12A(1) and civil liability for damages for each day of violation; the Planning Board can also order restoration of the disturbed slope after a hearing, require a restoration bond, and suspend or revoke the permit for noncompliance.
Frequently Asked Questions
Is there a seasonal deadline for erosion control on Greenburgh slopes?
How fast must exposed soil be stabilized in Greenburgh?
What happens if a Greenburgh developer skips the erosion control plan?
Sources & Official References
Other rules in Greenburgh
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Erosion Control in Nearby Cities
How other cities in Westchester County handle erosion control.