Illinois building permits
We index 361,297 building permits across 1 Illinois metro — Chicago — classified into real segments, parcel-joined, with field-level data-quality flags.
The largest segments statewide are Residential Alteration (39%), Commercial Alteration (32%), Commercial Signage Permits (15%).
Metros we cover in Illinois
- Chicago361,297
Counts are live from the classified index, refreshed nightly. Each metro links to its full breakdown — segments, permit types, and contractors.