Authority desk
The pulse check homeowners, realtors, and planners use before they talk setbacks or write a check.
Updated August 2026
S.B. 284 detached mandate
Oct 1, 2026
Specified municipalities must allow qualifying detached ADUs as permitted uses.
Internal ADU property exception
≤ 6,000 sq ft
Cities may prohibit internal ADUs on properties at or under this size.
Detached statewide floor
11,000 sq ft
Property-size floor for the statewide detached mandate on qualifying single-family properties.
Utah markets we build
SLC · Utah Co · Davis
Depth first — we own the Front, then expand.
Dig into city detail on city playbooks or the legal summary in How it works.
Numbers are nice. A build plan is better.
Utah ADU Builder turns Index rules into a package, a number, and a crew.