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§ 02
When a permit is required
Permit triggers and exempt work for Trempealeau County
A building permit is required for new one- and two-family dwellings, additions, alterations, and repairs under the Wisconsin Uniform Dwelling Code (UDC), which is mandatory statewide for residential construction. Commercial projects are governed by the Wisconsin Commercial Building Code. Contact the local building inspector for permit requirements.
Required documents
- permit application, site plan, construction details, and any shoreline/floodplain materials if applicable
§ 03
Frequently asked
Common questions about unincorporated Trempealeau County permits
01 Do I need a building permit in unincorporated Trempealeau County, WI? ▸
A building permit is required for new one- and two-family dwellings, additions, alterations, and repairs under the Wisconsin Uniform Dwelling Code (UDC), which is mandatory statewide for residential construction. Commercial projects are governed by the Wisconsin Commercial Building Code. Contact the local building inspector for permit requirements.
last verified April 2026
source Trempealeau County Land Management Department ↗
entry id permits/wisconsin/trempealeau/unincorporated
Educational reference. Permit rules and fees change — confirm current requirements directly with Trempealeau County Land Management Department before applying. Jaspector is not legal advice.