What Permits Do You Need to Install Solar Panels in Wisconsin?
Guide to solar panel permits in Wisconsin, covering electrical and building permit requirements, interconnection agreements, and Focus on Energy incentives.
Yes, you typically need a permit. To install solar panels in most Wisconsin municipalities, you need Electrical Permit, and Residential Building Permit. Here's exactly what's required.
Permits Required
The following permits are typically required to install solar panels in Wisconsin. Actual requirements vary by municipality.
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.
Residential Building Permit
Required for new single-family homes, duplexes, and multi-family dwellings in Wisconsin. The state enforces the Uniform Dwelling Code (UDC) statewide through DSPS, but municipalities issue permits and conduct inspections locally. Plans must comply with SPS 320–325 for structural, energy, and safety requirements.
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:
- Electrical Permit: Replacing a light switch, outlet, or light fixture in kind
- Electrical Permit: Replacing a plug-in appliance
- Residential Building Permit: Accessory structures under 200 sq ft (varies by municipality)
- Residential Building Permit: Interior cosmetic work with no structural changes
Exemptions vary by municipality. Always confirm with your local building department before starting work without a permit.
Frequently Asked Questions
What permits do I need for solar panels in Wisconsin?
Solar panel installations in Wisconsin require an electrical permit in every municipality. Many cities also require a building permit because the panels add structural load to the roof. You will also need an interconnection agreement with your utility company before connecting to the grid. Some municipalities require a zoning review to verify the panels comply with setback and height restrictions.
Are there solar incentives available in Wisconsin?
Yes. Wisconsin residents can take advantage of the federal solar Investment Tax Credit (ITC), which covers 30% of installation costs. Focus on Energy, Wisconsin's statewide energy efficiency program, offers additional rebates that vary by year. Some municipalities and utilities offer further incentives. The combined savings can offset 35–45% of total installation cost.
Can my HOA block solar panel installation in Wisconsin?
Wisconsin law (Wis. Stat. § 66.0401) generally protects the right to install solar energy systems and restricts local governments and HOAs from unreasonably prohibiting them. However, HOAs can impose reasonable aesthetic requirements such as placement guidelines. If your HOA denies your request, the burden is on them to show the restriction is reasonable.
Building in multiple cities?
See permit requirements for any Wisconsin municipality instantly. Compare fees, timelines, and processes side by side across your active jurisdictions.