City of Yonkers
City of Yonkers Department of Housing and Buildings / Engineering Department
CityMS4 Phase IVerified 2026-03
Local Permit / Authorization
- Permit Required
- Yes
- Permit Name
- Grading / Building Permit with Stormwater Management Plan
- Submit To
- City of Yonkers Department of Housing and Buildings / Engineering Department
- Lead Time
- Plan review 3–6 weeks; stormwater review concurrent with building permit
- Application Method
- Via Yonkers Department of Housing and Buildings; stormwater management plan submitted with permit application
- Fee
- Permit fees per project scope
Water Quality Standards
- Impervious Cover Limit
- No citywide cap; post-construction stormwater management required per NYSDEC MS4 permit for projects creating ≥ 1 acre of impervious surface
- On-Site Treatment Required
- Yes
- Detention Required
- Yes
- Detention Standard
- Manage the first 1 inch of rainfall on-site using green infrastructure per NYS Stormwater Management Design Manual
- Turbidity Standard
- Must comply with NYSDEC SPDES CGP
Local SWPPP / Drainage Plan
- Local Plan Required
- Yes
- Plan Name
- SWPPP per NYSDEC SPDES CGP; local stormwater management plan per city ordinance
- PE Stamp Required
- Yes
Plans must be prepared by a NY-licensed PE. Yonkers is within the NYC East of Hudson watershed for some areas, which triggers enhanced requirements.
Local Inspection Requirements
- Requirements
- City inspects construction at permit milestones. Post-construction BMPs require maintenance agreements.
- Inspector Qualification
- NYSDEC-approved QI/TC per SPDES CGP; no additional city certification
Special Overlay Zones
Hudson River Waterfront
Trigger: Properties along the Hudson River waterfront
Restriction: Enhanced water quality protection; NYS Coastal Management Program review; Hudson River Estuary Program protections; waterfront revitalization plan compliance
NYC East of Hudson Watershed (partial)
Trigger: Eastern portions of Yonkers within the NYC drinking water watershed
Restriction: Enhanced NYSDEC thresholds (≥ 5,000 sq ft); additional SWPPP requirements; NYC DEP coordination may be required
Design Manual
- Manual Name
- NYS Stormwater Management Design Manual / City of Yonkers Engineering Standards
Official Resources
Jurisdiction Notes
Yonkers is the fourth-largest city in New York and sits immediately north of NYC along the Hudson River. Some eastern portions fall within the NYC East of Hudson watershed, triggering more stringent thresholds. The city's mix of dense urban development and hilly terrain creates varied stormwater challenges.
Remember: These local requirements are in addition to the NYSDEC state construction permit. Both must be satisfied before breaking ground.
Disclaimer: This information is provided for general reference only. Always verify requirements directly with City of Yonkers Department of Housing and Buildings / Engineering Department and the agency website before beginning construction.