ADU rules in Highland Park, IL — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Highland Park does not appear to have a specific ADU ordinance. Accessory dwelling units may require zoning approval under Chapter 150. Illinois HB 2373 (2024) encourages ADU development statewide.
Highland Park has not been identified among Illinois communities that have adopted specific ADU ordinances. ADUs may require zoning approval or a variance under Chapter 150. Illinois HB 2373 (effective 2024) encourages ADU development and limits certain municipal restrictions. Highland Park, as a home rule city (population over 25,000), has authority to set its own standards. Contact Community Development at 847-432-0808 to determine if ADUs are currently permitted in your zoning district.
Unpermitted ADUs face stop-work orders and removal or legalization requirements. Fines of $500–$2,000 apply for unpermitted construction. Properties with illegal ADUs may face title issues at sale.
Highland Park, IL
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Highland Park, IL
Construction and landscape noise in Highland Park is regulated under Chapter 170 (Building Code) and Chapter 95 (Nuisances). Construction activity is general...
Highland Park, IL
Highland Park regulates nighttime noise under Chapter 95 (Nuisances). Quiet hours generally run from 8 PM to 7 AM on weeknights and until 9 AM on weekends an...
Highland Park, IL
Highland Park enforces a winter overnight parking ban from 2 AM to 6 AM, December 1 through March 31. Year-round street parking regulated under Chapter 72. V...
Highland Park, IL
Commercial vehicle parking in Highland Park residential areas is restricted under Chapter 72 and the zoning code. Park District property requires a permit fo...
Highland Park, IL
Driveway construction and modifications in Highland Park require permits from the Building Division. Specific submittal requirements outlined in the city's D...
Side-by-side rule comparisons with other cities in Lake County.
See how other cities in Lake County handle adu rules.
See how Highland Park's adu rules rules stack up against other locations.
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