Quick answer
Most Illinois homes need a building and electrical permit from their city or village, plus utility approval from ComEd or Ameren, and your installer usually handles both. Of the 142 towns we cover, 34 hold a SolSmart designation for easier solar permitting, and 9 say they review small rooftop permits in about three business days.
What permits does home solar need in Illinois?
- 1
Building and electrical permits
Your installer applies to your city, village or county. Many towns want a site plan, roof or structural details and the electrical design.
- 2
Utility interconnection
ComEd or Ameren approves connecting the system to the grid before it turns on.
- 3
Inspections
A local inspector checks the finished work, often in two visits: before the panels go on and at the end.
- 4
Illinois Shines and rebates
Your installer registers the system for Illinois Shines and files the utility rebate.
Illinois doesn't have one statewide solar permit, so the details vary by town. Each of our town pages lists that town's own rules with sources. See how long solar installation takes for the full timeline.
Which Illinois towns make solar permits easiest?
SolSmart is a national program that recognizes towns for making solar permitting and zoning easier. In the Chicago area, the Metropolitan Mayors Caucus helps towns earn it. Towns we cover that hold a designation:
- Gold: Aurora, Bartlett, Beach Park, Carol Stream, Chicago, Deerfield, Evanston, Hanover Park, Montgomery, Mount Prospect, Northbrook, Oak Park, Rockford, Skokie, South Barrington, Urbana, Warrenville, Waukegan
- Silver: Darien, Deer Park, Highland Park, La Grange, Libertyville, Mundelein, River Forest, Schaumburg, Westmont, Wilmette
- Bronze: Brookfield, Hanover Park, Hoffman Estates, Lake Forest, Oak Forest, Palatine
Which towns review rooftop solar permits in about three days?
These towns say they turn around complete residential solar permit applications in about three business days:
Other towns take longer: Winfield, for example, says permit review may take up to two weeks. Submitting a complete application, with every required document, avoids most delays.
What local solar rules should I watch for?
- Roof-only towns. Lincolnwood, for example, allows home solar only on rooftops and prohibits ground-mounted arrays.
- Ground-mount limits. Many towns allow ground mounts only in rear yards, with setbacks and height limits. See ground-mount vs. roof-mount solar.
- Structural and engineering stamps. Several towns, including Elk Grove Village, Rolling Meadows and Oak Forest, require a structural report or engineer's stamp.
- HOA approval. Illinois limits how far HOAs can restrict solar. See Illinois HOA solar rules.
Do historic districts affect solar permits?
They can. In some towns, homes that are designated landmarks or sit in a local historic district need a review or certificate of appropriateness before exterior changes like solar. Towns we cover with historic review rules on their pages:
How do I find my town's solar rules?
Start with your town's page: each lists local permit and zoning rules with links to the village or city source. Browse all Illinois towns we cover, or call your building department. A good installer will also know your town's process and pull the permits for you. See how to choose a solar installer.
Sources
This guide is general information, not tax, legal or financial advice. Incentive programs change, so confirm current terms with your installer, your utility and a tax professional.