Environmental Rules in Yonkers, NY (2026)
7 verified environmental rules for Yonkers, New York, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Yonkers is an MS4 community under NYS DEC SPDES General Permit GP-0-15-003. Illicit discharges to storm drains are prohibited; new development must meet NYS Stormwater Management Design Manual standards.
environmental/stormwater
Heavy RestrictionsNYSDEC Stormwater SPDES General Permits (MSGP, MS4 GP, CGP)
Regulatory Requirements The USEPA and New York State Department of Environmental Conservation (NYSDEC) are increasing their attention in several ways. There are three State Pollutant Discharge Elimination System (SPDES) general permits required for activities associated stormwater discharges. The Multi-Sector General Permit for Stormwater Discharges Associated with Industrial Activities (MSGP) ...
Erosion Control
When a Yonkers development site has more than 5,000 square feet with a slope over 15%, City Code § 43-105B imposes extra erosion and sediment control standards for site plan approval. Builders must limit exposed ground, stabilize soil within two days when grading pauses, follow NYSDEC erosion guidelines, and cannot stockpile topsoil on steep slopes without mitigation.
Yonkers Steep-Slope Sites: Erosion Control Rules
Some RestrictionsYonkers City Code § 43-105B(1)(h),(j),(k),(o)
(h) Disturbance of existing vegetation and ground cover shall not take place more than 15 days prior to the start of grading and construction operations. ... (j) Temporary soil stabilization measures such as netting, mulching or hydro seeding shall be shown as necessary on the site plan and shall be applied within two days of disturbance if final grade is not expected to be established within 3...
Coastal Development
Hudson River waterfront development in Yonkers is governed by the city's Local Waterfront Revitalization Program (LWRP) and NYS DEC tidal wetlands/Article 25 permits. Major projects also require Army Corps Section 404/10 permits.
environmental/coastal-development
Heavy RestrictionsNYS Department of State - Local Waterfront Revitalization Program (LWRP)
Local Waterfront Revitalization The LWRP is the State’s primary program for working in partnership with waterfront communities across New York State. Overview The Local Waterfront Revitalization Program (LWRP) serves as the Office of Planning and Development’s primary program for working in partnership with waterfront communities across the State to address local and regional (coastal or inland...
Flood Zones
Yonkers bars any construction, filling or excavation in a FEMA-mapped special flood hazard area without a floodplain development permit from the City Engineer, and every violation is a separate daily offense punishable by up to a $250 fine or 15 days in jail. The rules apply citywide wherever FEMA has mapped a flood zone.
Yonkers Floodplain Development Rules and Penalties
Significant RestrictionsYonkers City Code § 56-146E
Penalties for noncompliance. No structure in an area of special flood hazard shall hereafter be constructed, located, extended, converted, or altered and no land shall be excavated or filled without full compliance with the terms of this article and any other applicable regulations. Any infraction of the provisions of this article by failure to comply with any of its requirements, including inf...
Boat Dock Permits
Yonkers zoning caps private piers, docks and boathouses on waterfront residential lots: piers may run no more than 50 feet into the water and six feet wide, and boathouses are limited to 10 feet in height and 40% of the rear yard.
Yonkers Boat Dock and Boathouse Size Limits
Some RestrictionsYonkers City Code § 43-41I
I. Piers, docks and boathouses. (1) Boathouses and covered moorages shall not exceed a height of 10 feet above high tide, nor shall the aggregate floor area of such structures exceed 40% of the rear yard. (2) The maximum length that a pier may extend into the water shall not exceed 50 feet beyond the high-tide line and shall not exceed six feet in width. (3) Piers shall be attached to the shore...
Vehicle Idling Restrictions
Yonkers caps engine idling at three minutes for any parked, standing, or stopped motor vehicle under City Code § 109-88, with an exception for vehicles running a loading or processing device. Buses face a tighter rule: once the temperature tops 40°F, a bus may not idle at all while parking, standing, or stopped at a terminal point on its route.
Yonkers Caps Vehicle Engine Idling at Three Minutes
Some RestrictionsYonkers City Code § 109-88
§ 109-88. Idling of engine. No person shall cause or permit the engine of a motor vehicle, other than a legally authorized emergency motor vehicle, to idle for longer than three minutes while parking, standing or stopping, unless the engine is used to operate a loading, unloading or processing device. When the ambient temperature is in excess of 40° F., no person shall cause or permit the engin...
Flood Elevation Requirements
New construction and substantial improvements in Yonkers' mapped Zones A1-A30, AE and AH must have the lowest floor, including any basement, elevated at least two feet above the base flood level. Nonresidential buildings get an alternative: floodproof the structure watertight to that same two-foot mark instead of elevating it.
Yonkers Freeboard: Two Feet Above Base Flood Level
Significant RestrictionsYonkers City Code § 56-148F(1), § 56-148G(1)
Residential structures; elevation. ... Within Zones A1-A30, AE and AH, and also Zone A if base flood elevation data are available, new construction and substantial improvements shall have the lowest floor (including basement) elevated to or above two feet above the base flood level. ... [§ 56-148G(1)] new construction and substantial improvements of any nonresidential structure, together with a...
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