Need a site plan or a stormwater design in St. Croix County, WI? St. Croix County has about 97,954 residents (2024 estimate) and 12 incorporated cities and towns. Describe your project once: licensed civil engineers who work in St. Croix County get back to you.
Site plan review in St. Croix County is handled by each city, or by the county in unincorporated areas.
Services available in St. Croix County
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Site plan, grading and utilities
Civil site plan with grading, utilities and access, sealed by a licensed engineer for the permit.
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Stormwater and drainage design
Drainage calculations and stormwater management design required by the city, county or state.
Frequently asked questions in St. Croix County
Do licensed civil engineers cover the whole of St. Croix County?
Most pros work across the county and neighboring counties. Enter your ZIP code in the form and we match you with pros who serve your exact area.
Civil Engineering Site Plans in Wisconsin: all counties
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.