Illinois Nonconforming Use Continuation (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.has_lawful_existing_nonconforming_use == TruePreempted fields
1 field on the base district schema is rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
base_districts[*].nonconforming_use_continuation | override | permitted | Lawful uses existing at time of zoning enactment may continue. Subject to amortization, expansion restriction, abandonment termination — bounded by takings analysis. |
Citation
Authority source
65 ILCS 5/11-13-25 (municipal); 55 ILCS 5/5-12014 (county)
§ 65 ILCS 5/11-13-25
Research notes
Codifies common-law nonconforming-use rule. Not an absolute preemption — a floor. Municipalities may amortize, restrict expansion, or terminate on abandonment subject to constitutional takings analysis.