Definition
A building permit is official approval from the Chicago Department of Buildings to do construction work, required for most work beyond cosmetic repairs.
Building Permit, Explained
In Chicago, permits are issued by the Department of Buildings. Generally, work that changes the structure, layout, plumbing, electrical, or mechanical systems needs a permit. Purely cosmetic work, like painting or replacing flooring, usually doesn’t.
Simpler projects can often go through a faster permit path that doesn’t require full architectural drawings. Larger or structural projects, like gut rehabs, additions, and most commercial buildouts, go through plan review with drawings from a licensed architect or engineer.
Once a permit is issued, the work is inspected at key stages (such as rough plumbing and electrical, and final) before it can be closed out.
Why It Matters for Your Project
Unpermitted work can fail a home sale inspection, void insurance claims, and need to be opened up and redone. A permit also means the work was checked by the city.
What to Watch For
- Ask the contractor who pulls the permit and whether fees are included in the price.
- Make sure the permit is posted at the job site.
- Don’t close up walls before rough inspections pass.
- Keep the final permit and inspection records with your property documents.