ADU rules in Evanston, IL — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Evanston permits accessory dwelling units in certain residential zoning districts. ADUs may be created through coach house construction, garage conversions, or additions to existing structures, subject to zoning approval and building permits.
Evanston has updated its zoning ordinance to allow accessory dwelling units in residential districts as part of the city's efforts to increase housing options. ADUs may take the form of coach houses (detached units in rear yards), internal conversions within existing structures, or additions to primary dwellings. Size limits typically cap ADUs at a percentage of the principal structure's floor area or a maximum of 750-800 square feet. ADUs must meet the same setback requirements as other accessory structures. One off-street parking space may be required depending on the zoning district and proximity to transit. Owner occupancy of either the principal dwelling or the ADU may be required. ADUs must comply with all building code requirements including independent egress, kitchen, and bathroom facilities. Contact Community Development at (847) 448-4311 for current ADU regulations and permit requirements.
Constructing or occupying an ADU without proper zoning approval and building permits is a code violation. Fines for unpermitted construction start at $250 per day. The city may require removal of non-compliant ADUs.
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Side-by-side rule comparisons with other cities in Cook County.
See how other cities in Cook County handle adu rules.
See how Evanston's adu rules rules stack up against other locations.
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