Illinois County Zoning Enabling Act (IL)
Tracked preemption from the Illinois overlay bundle.
Overview
← All state preemptionsIllinois overlay roll-upIllinois zoning wikiIllinois building codesFederal overlaysGlossaryFederal-conflict: Not flagged
Effective
1961-07-01
Sunset
—
Authority
state
Scope
state:IL
Other Illinois preemptions
Illinois Connected Communities Act (HB 4083 / SB 2352) — PendingIllinois STR Statewide Registry (HB 3713) — PendingIllinois Commercial Wind Facility Zoning Preemption (PA 102-1123)Illinois Commercial Solar Facility Zoning Preemption (PA 102-1123)Illinois Hotel Operators' Occupation Tax — Short-Term Rental ReachIllinois Affordable Housing Planning and Appeal ActIllinois Property Tax Code — Class L Landmark Rehabilitation IncentiveIllinois Manufactured Housing Anti-Exclusion
Trigger predicate
When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.
parcel.in_unincorporated_county == TruePreempted fields
2 fields on the base district schema are rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
zoning_authority | override | county | County zoning applies only to unincorporated territory; municipal zoning supersedes upon annexation/incorporation |
amendment_supermajority_required_pct | floor_at | 75 | §5-12009.5 supermajority-override vote on ZBA-recommended amendments |
Citation
Authority source
55 ILCS 5/5-12001 through 5/5-12019
§ 55 ILCS 5/5-12001 et seq.
Research notes
Counties zone unincorporated territory only. County zoning authority stops at municipal boundaries. Cook, DuPage, Kane, Lake, Will, McHenry counties have specific frameworks. Cook County zoning applies only to ~2% unincorporated land.