ADU rules in Aurora, IL — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Aurora permits detached ADUs on lots with single-family homes on lots over 6,000 sq ft. Maximum ADU size is 650 sq ft and 24 ft height. Property owner must occupy either the primary or ADU. ADUs may be used as short-term rentals by owner-occupants.
Aurora's UDO Section 3.3.6 permits accessory dwelling units on lots containing one single-family dwelling. Only detached ADUs are allowed; attached units are not permitted. The lot must be at least 6,000 square feet. Maximum ADU size is 650 square feet with a 24-foot height limit regardless of primary dwelling height. At least 360 square feet of usable private outdoor space (minimum 10-foot dimensions) must be provided. The property owner must occupy either the primary dwelling or the ADU. ADUs may be used as short-term rentals by an owner living in the primary structure. Setbacks follow accessory structure standards. Illinois HB 2373 (2024) encourages ADU development statewide.
Unpermitted ADU: citation and potential removal order. Non-owner-occupancy: code violation.
Aurora, IL
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Side-by-side rule comparisons with other cities in this county.
See how other cities in this county handle adu rules.
See how Aurora's adu rules rules stack up against other locations.
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