Utah ADU Builder
Utah ADU Builder
Modern ADUs in Salt Lake City
A modern ADU in Salt Lake City is still an accessory dwelling unit: a second home on a lot you already own. The look — flat roof, cedar, large glass — does not change the permit path. Salt Lake City’s zone, parking, and any overlay do.
Last reviewed 2026-09-22. Planning guidance, not a permit or a construction contract.
Three modern forms, one city process
Salt Lake City: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
An internal suite keeps the new living space inside the house. A garage conversion reuses a building you already have. A detached casita is a new backyard structure and follows the detached rules, including the statewide floor for qualifying lots of about 11,000 sq ft beginning October 1, 2026.
The photos on this site are architectural concepts, not finished Salt Lake City projects. Use them to compare massing, then take the address to the city guide and a partner.
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Questions
Are modern ADUs allowed in Salt Lake City?
Style is rarely the legal test. Salt Lake City decides by zone, lot, unit type, parking, and any overlay or historic review. Start with the Salt Lake City ADU guide and the address.
Where can I see Salt Lake City ADU designs?
The design library shows schematic concepts for backyard, basement, and garage units. They are inspiration, not documented completed projects.