Sun Prairie, WI Solar Energy: Panel Permits (2026)

The Sun Prairie Code of Ordinances classifies solar as an accessory use rather than a discretionary land use. 140(31). 140(32); neither one needs a special-use or conditional-use permit before installation, only the standard building permit review that applies to any accessory structure. 090(A)(3), the city's exceptions-to-maximum-height chapter, allows roof-mounted solar energy systems to exceed the maximum height limitations that would otherwise apply in the respective zoning district, so an array does not force a homeowner or business into a separate height variance. That height allowance sits inside the same section that already lets features like chimneys, flagpoles and communication equipment rise above the district's cap.

A large primary-use solar installation, one that is the main land use on a parcel rather than an accessory to a home or business, is treated differently and goes through a discretionary approval process instead of this by-right accessory-use track. Sun Prairie's zoning ordinance also lists sunlight access for solar collectors among the stated purposes the subdivision and height-exception rules are meant to protect.