ADU rules in Salt Lake City, UT — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
ADUs (internal, attached, and detached) allowed citywide in single-family zones per SLC 21A.40.200 (2018, expanded 2021).
Salt Lake City permits one ADU per single-family lot citywide. Detached ADUs allowed up to 50 percent of main home floor area or 650 sq ft (whichever greater), max 720 sq ft footprint, 17 ft tall (23 ft with pitched roof). Owner occupancy of primary or ADU required. Building permit and ADU registration required. One extra off-street parking space required except in transit-served areas.
Contact your local code enforcement office for specific penalty information.
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Side-by-side rule comparisons with other cities in Salt Lake County.
See how other cities in Salt Lake County handle adu rules.
See how Salt Lake City's adu rules rules stack up against other locations.
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