Illinois Nonconforming Use Continuation (IL)

Tracked preemption from the Illinois overlay bundle.

Overview

Effective
1961-07-01
Sunset
Authority
state
Scope
state:IL

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 == True

Preempted fields

1 field on the base district schema is rewritten when the trigger fires.

FieldOpValueNote
base_districts[*].nonconforming_use_continuationoverridepermittedLawful 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
https://www.ilga.gov/legislation/ilcs/documents/006500050K11-13-25.htm

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.