Environmental Rules in West Allis, WI (2026)
3 verified environmental rules for West Allis, Wisconsin, sourced directly from the municipal code and official government pages.
Verified from official government sources
Erosion Control
West Allis requires a Building Inspector-approved control plan and permit before any construction site disturbs 4,000 square feet or more of ground, to keep sediment out of city waters.
West Allis Construction Erosion Control
Significant RestrictionsWest Allis Revised Municipal Code § 13.32
Those involving grading, removal of protective ground cover or vegetation, excavation, land filling or other land disturbing activity affecting a surface area of four thousand (4,000) square feet or more. ... No land owner or land user may commence a land disturbance or land development activity subject to this section without the owner or agent for the owner obtaining prior approval of a contr...
Flood Zones
The City of West Allis participates in the National Flood Insurance Program (NFIP) and regulates floodplain development in conformance with Wis. Stat. Sec. 87.30 and Wisconsin Administrative Code Chapter NR 116, plus 44 CFR Parts 59-72. Honey Creek (a tributary of the Menomonee River) and the Kinnickinnic River watershed run through the city and are the principal regulated waterways. The city maintains a public Flooding Tracker GIS service that shows the FEMA 100-year floodplain and floodlines for West Allis. Development in mapped Special Flood Hazard Areas requires zoning approval; new residential structures are prohibited in the regulatory floodway, and habitable space in the flood fringe must be elevated to the flood protection elevation.
Flood Zone Regulations (West Allis, WI)
Heavy RestrictionsWis. Stat. § 87.30(1)(a)
If any county, city or village does not adopt a reasonable and effective floodplain zoning ordinance within one year after hydraulic and engineering data adequate to formulate the ordinance becomes available, the department shall, upon petition of an interested state agency or a municipality or upon its own motion as soon as practicable and after public hearing, determine and fix by order the l...
Flood Elevation Requirements
West Allis requires new and substantially improved structures in mapped floodplains to elevate their lowest floor at least two feet above the regional flood elevation, a freeboard standard set in the city's Floodplain Zoning Ordinance.
West Allis Flood Protection Elevation Rules
Some RestrictionsWest Allis Revised Municipal Code § 12.71, s. 4.3(1)(a)
All new construction, including placement of manufactured homes, and substantial improvement of residential structures, shall have the lowest floor elevated to or above the flood protection elevation on fill. The fill around the structure shall be one foot or more above the regional flood elevation extending at least 15 feet beyond the limits of the structure. No area may be removed from the fl...
Looking for Milwaukee County county-wide rules?
County ordinances apply to unincorporated areas and may supplement West Allis city rules.
Environmental Rules in Milwaukee County →