Home › Utah ADU rules
From October 1, 2026, Utah's 82 specified municipalities must allow a detached ADU on lots of 11,000 sq ft or more with a single-family home (the state law). Each city sets its own size, height, parking and rental rules. Here is where each one stands.
City rules change as councils adopt ordinances. Each city page says when it was last verified and links its sources. Not legal advice.