PermitNotebook

Illinois permit requirements

Each county and city in Illinois runs its own permit office with its own thresholds, fees, and portals. Use the links below to find the office and requirements for your project.

Building code in Illinois

Illinois Residential Building Code (statewide minimum). Based on a recent edition of the International Residential Code (IRC).

Administered by Illinois Capital Development Board (CDB). Official source

Home rule municipalities, including Chicago, adopt their own building codes. Confirm with the local jurisdiction.

Most local permit thresholds derive from this code. See our sources and standards.

Built without a permit in Illinois? Penalties and how to fix it

Counties and cities

Compare a permit across Illinois