4 county-level rules, plus city-specific rules for 1 city in Cook County, Illinois.
Verified from official government sources
Cook County does not use Los Angeles-style Historic Preservation Overlay Zones. Instead, Cook County Historic Preservation Ordinance Chapter 102 Article VI establishes Historic Districts and Landmarks for unincorporated areas, while suburbs designate their own districts under Illinois home-rule authority.
Cook County Historic Preservation Ordinance Chapter 102 Article VI authorizes individual Landmark designation for properties of architectural, historical, or cultural significance in unincorporated Cook. The Cook County Historic Preservation Commission reviews nominations and recommends designation to the County Board.
Illinois has no statute equivalent to the California Mills Act. Instead, Illinois Property Tax Code 35 ILCS 200/15-40 and Cook County Class L assessment incentive provide property tax reductions for landmarked rehabilitation projects, freezing valuations rather than reducing rates.
Cook County Historic Preservation Ordinance Section 102-318 imposes a 180-day demolition stay on designated Landmarks and contributing structures within Historic Districts. Illinois Compiled Statutes 765 ILCS 605 add condominium-association rules. Suburbs run parallel demolition-delay programs.
1 cities in Cook County have their own historic preservation rules. Each link goes to that city's dedicated page with code citations.
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Cook County Ordinance Hub →