Accessory Structures in Salt Lake County, UT (2026)

Salt Lake County Code §19.15.110 - ADU design standards; §19.15.120 - Affidavit and notice; §19.15.130 - Business licensing

A. An approved building permit is required for all ADUs before an ADU is constructed, and all other applicable provisions of this chapter and the Salt Lake County Code must be met before an ADU can be rented. ... B. A building permit may not be issued for an ADU until the applicant has provided written confirmation from the applicable water supplier that the ADU complies with all applicable wat...

Salt Lake County Code § 19.15.090 - Owner occupancy

The principal unit or the ADU must have owner occupancy, except for medical, military service, or religious reasons for a time period of up to two years. If an absence is warranted due to the above reasons, an on-site manager shall be designated. The property owner may not receive rent for the unit that was occupied by the owner. An application for an ADU shall include evidence of owner occupan...

Salt Lake County Code §§ 19.15.130, 19.15.150 (see also § 19.15.090, § 19.15.140(D))

Prior to renting out any ADU, a business license must be obtained. That license must be maintained as long as the unit is rented out. [...] Units approved as ADUs shall not be used as short-term rentals. Any rentals shall be made for thirty consecutive days or more. [...] The principal unit or the ADU must have owner occupancy, except for medical, military service, or religious reasons for a ti...

Salt Lake County Code § 19.14.020 - Permitted uses; §§ 19.14.050(B), 19.14.060(B), 19.14.070

Permitted uses in the R-1 zones are as follows: Zone Permitted Uses All R-1 zones —Accessory uses and buildings customarily incidental to a permitted use provided the total square footage of all accessory buildings does not exceed eight hundred square feet on lots under one-half acre or one thousand two hundred square feet on lots one-half acre or larger; ... Zone Minimum Front Yard Minimum Sid...

Salt Lake County Code § 19.15.110(E), (L) - ADU design standards

Conversions of an existing space to an ADU will require compliance with safety requirements per building code including, but not limited to, egress windows with window wells in case of emergency, and sufficient HVAC and climate control for the ADU.F.IADUs shall not require a separate HVAC or firewall.G.The owner shall provide a separate address marking for emergency services and mailing service...