Illinois · ILCoverage expanding
Illinois residential & ADU permit data
Chicago leads a major Midwestern market
We're expanding to Illinois. Subscribe to be notified when it goes live.
Housing law
Accessory dwelling units in Illinois are regulated locally; there is no statewide ADU mandate, with Chicago running its own ADU ordinance.
Illinois has no statewide upzoning law; residential density is set by local zoning.
Local zoning (no statewide mandate)
Major permit jurisdictions
Chicago
Why Igni for Illinois
Anchored by Chicago, one of the largest US permitting markets
Permit intelligence built on Chicago's mature open-data portal
Request priority coverage and we'll notify you when Illinois goes live
Start tracking Illinois permits
Fresh, filterable residential and ADU permit leads — delivered before your competitors even know.
Permit data via municipal open-data portals (including Chicago's data.cityofchicago.org) and public records where available.
Informational only, not legal advice. Housing law changes — verify current statutes before relying on this.