Solar Panel Rules in Madison, WI (2026)
Solar panel installation rules, mandate status, HOA restrictions, and permit process for Madison, WI.
Madison, WI does not currently have a solar installation mandate. Solar panels are a permitted use on residential and commercial properties subject to standard building permit requirements. Property owners in Madison must obtain a permit before installing solar panels. HOA restrictions on solar are limited by state law. Madison offers permit review for residential solar installations. Below you will find the current solar mandate status, HOA rules, permit process, and any historic district restrictions that apply to solar installations in Madison.
Solar Mandate Status
No Solar Mandate in Madison: Madison does not currently have a solar installation mandate for new or existing construction. Installing solar is voluntary and subject to permit requirements. Federal Investment Tax Credit (ITC) may apply — consult a tax professional for current incentive information. Madison Gas and Electric (MGE) is one of Wisconsin's most solar-friendly utilities — MGE has committed to 100% carbon-free electricity by 2050. Wisconsin Focus on Energy provides solar rebates. Madison's solar penetration rate is among the highest in the Midwest. University of Wisconsin-Madison campus solar installations provide community education and visibility.
HOA Restrictions
HOA Restrictions on Solar in Madison: Wisconsin law provides limited solar protections. Some Madison subdivisions have HOA restrictions on solar installations. Madison's older urban and near-campus neighborhoods typically have no HOAs. Madison Gas and Electric (MGE) supports residential solar through net metering and the Green Power Tomorrow program.
Permit Process
Permit Process in Madison: Madison Building Inspection electrical permit required for all rooftop solar. Madison Gas and Electric (MGE) interconnection application required for net metering. Wisconsin Focus on Energy program provides solar rebates ($0.10-$0.25/watt). MGE net metering available for residential systems. SolarAPP+ streamlined solar permitting being adopted. Madison has strong community solar participation through MGE's renewable energy program.
Historic District Considerations
Historic District Considerations in Madison: Madison Landmarks Commission review required for solar on contributing structures in designated historic districts (Third Lake Ridge, Mansion Hill). Review focuses on rooftop visibility and compatibility with historic character. If your property is located in a historic district, contact the City of Madison Department of Planning, Community & Economic Development (DPCED) before designing your solar system — placement restrictions may affect system output.
Frequently Asked Questions
Can I build an ADU near the UW-Madison campus?
Yes — and Madison makes it particularly easy in urban transect zones (TR-U1, TR-U2) near campus. In these zones, ADU approval is by-right (no discretionary review), no additional parking is required, and setbacks are minimal. Detached ADUs up to 1,000 sqft are permitted. Madison's ADU program is among the most progressive in the Midwest, designed in part to address the intense student rental housing demand around the University of Wisconsin campus.
What is Madison's transect zoning system?
Madison replaced traditional Euclidean zoning with a form-based transect code in 2013 under Chapter 28. The transect ranges from TR-C1 (countryside, lowest density) to TR-U2 (urban core, highest density). Each zone reflects an urban-to-rural intensity gradient — the higher the zone designation, the more urban the character and the more flexibility for mixed uses, reduced parking, and denser development. You can find your property's transect zone on the Madison zoning map at cityofmadison.com/dpced/planning/zoning.
Does Madison require parking for ADUs?
No — in Madison's urban transect zones (TR-U1 and TR-U2), no additional parking is required for an ADU. This is one of the most progressive ADU parking policies in the Midwest. In suburban transect zones (TR-C3, TR-C4), one parking space may be required. Madison has actively reduced parking requirements city-wide to encourage density and transit use.
What are the Dane County Farmers Market and cottage food rules in Madison?
The Dane County Farmers Market on Capitol Square is one of the nation's largest producers-only markets — vendors must grow or produce what they sell. Wisconsin Cottage Food Law (WI Stat. 97.29) allows home-based food production up to $20,000 annual revenue without a permit. In-person sales only — Wisconsin does not allow online cottage food sales. No state permit required. Madison does not add a local cottage food permit requirement. Permitted products include baked goods, jams, jellies, candy, and similar non-hazardous items.
My property is near Lake Mendota — are there extra restrictions?
Yes. Properties within 300 feet of Lake Mendota and other navigable waterways in Madison are subject to the Wisconsin DNR Shoreland Overlay regulations. These rules impose: minimum 75 ft shoreline setback for structures, impervious surface limits (typically 15-30% of the shoreland area), and vegetation preservation requirements within 35 ft of the ordinary high-water mark. These restrictions apply in addition to city zoning rules. Contact Madison Planning at (608) 266-4635 for a shoreland consultation before starting any project near the lakes.
Source: Madison Building Department — Solar Panel Permits. Last verified April 6, 2026. View source