What Permits Do You Need to Build a Garage in Wisconsin?
Guide to garage construction permits in Wisconsin, covering detached and attached garages, electrical requirements, setback rules, and typical permit fees.
Yes, you typically need a permit. To build a garage in most Wisconsin municipalities, you need Garage Permit, and Electrical Permit. Here's exactly what's required.
Permits Required
The following permits are typically required to build a garage in Wisconsin. Actual requirements vary by municipality.
Garage Permit
Required for constructing new attached or detached garages in Wisconsin. Garages must comply with the UDC for residential properties, including fire separation requirements between attached garages and living spaces, concrete floor requirements, and proper ventilation. Detached garages must meet setback and lot coverage requirements.
Inspection required after work is completed.
Electrical Permit
Required for all electrical installations, alterations, and repairs in Wisconsin. The state adopts the National Electrical Code (NEC) with Wisconsin-specific amendments under SPS 316. All electrical work on residential dwellings must be performed by a licensed master or journeyman electrician, or by a homeowner on their own single-family residence.
Inspection required after work is completed.
Where to Apply
Permit requirements, fees, and processing times vary by municipality. Check the specific requirements for your location:
Browse all jurisdictions →Exemptions & Special Cases
In some circumstances, a permit may not be required. Common exemptions include:
- Garage Permit: Carports under 200 sq ft in some municipalities
- Garage Permit: Interior garage remodeling without structural changes
- Electrical Permit: Replacing a light switch, outlet, or light fixture in kind
- Electrical Permit: Replacing a plug-in appliance
Exemptions vary by municipality. Always confirm with your local building department before starting work without a permit.
Frequently Asked Questions
Do I need a permit to build a detached garage in Wisconsin?
Yes. Both attached and detached garages require a building permit in Wisconsin. Detached garages must meet setback requirements from property lines (typically 3–5 feet for side and rear yards) and may have size limitations based on your zoning district. You will also need an electrical permit if the garage has any wiring, lighting, or outlets.
What is the maximum size garage I can build without a permit?
There is no statewide exemption for garages in Wisconsin based on size alone. Some municipalities exempt accessory structures under 120–200 square feet from a building permit, but garages with electrical service always require at least an electrical permit. Most detached garages exceed the size threshold and require a full building permit.
How much does a garage building permit cost in Wisconsin?
Garage building permits in Wisconsin typically cost $150 to $800, depending on the municipality and whether the garage is attached or detached. An electrical permit adds $50 to $200. If the garage includes plumbing (a utility sink or bathroom), you will also need a plumbing permit at an additional $50 to $150.
Building in multiple cities?
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