Illinois building code and construction permits (IL)
Illinois has no single statewide building code for all construction. The Capital Development Board adopts the codes that apply to state buildings and the statewide plumbing, accessibility and energy requirements, and each municipality adopts its own building code. Start with your municipal building department.
Illinois building code and construction permits
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What you can look up here
- Building permitsWho issues permits for a house, garage, shed, deck, or addition.
- Laws and rulesThe state laws and rules behind zoning, shoreland, septic, and floodplains.
About this resource
- Provided by
- Illinois Capital Development Board (official)
- Covers
- Illinois statewide
- Link status
- Opened normally at the last check
- Link checked
- Oct 15, 2026
- Web address
- https://cdb.illinois.gov/business/codes.html
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