General Contractor in Highland, Utah

For every ADU, Section 3-624 of the Highland Development Code, amended by Ordinance O-2026-28 on September 1, 2026, sets conditions that include these.

• Registration of each ADU with the city, through an application and a recorded notice of approval that designates the addresses of both units, requires owner occupancy, and gives notice of the city's right to enforce these rules
• A business license, and the city's short-term rental rules, for any rental of an ADU shorter than 30 consecutive days, with no business license needed for 30 days or longer
• One ADU per residential property, internal or detached
• An owner-occupied property, with the owner living in the primary dwelling or the ADU
• A building permit, with inspection and approval by the Building Official and Fire Marshal before occupancy
• No separate utility accounts, meters, or laterals; enough utility capacity for the unit; Utah County Health Department approval before an ADU is connected to a private septic system; and a connection of both units to the city sewer, at the owner's expense, if the owner cannot or does not meet the health department's septic requirements
• An address for the ADU, separate from the primary dwelling's and set by the city
• Any garage or carport parking lost to the ADU replaced on the property
• No subdivision or separate transfer of the ADU from the property or the main dwelling

For an internal ADU, Section 3-624 adds these conditions.

• Single-family residential property on a lot or parcel of at least 6,000 square feet
• One off-street parking space for the internal ADU beyond the spaces the primary dwelling requires
• No change to the front of the main dwelling that suggests a second unit, apart from separate addresses and mailboxes
• The unit's primary entrance at the rear of the main dwelling, or at the side when fencing or landscaping hides it from the street

For a detached ADU, it adds these.

• Single-family residential property on a lot or parcel of at least 11,000 square feet
• An accessory building that meets the zone's accessory building rules, no taller than the lesser of the zone's accessory building height and the main dwelling's actual height
• The main dwelling's setbacks, with the rear setback reducible to 20 feet for a single-story building no more than 15 feet tall
• No placement between the main dwelling and the front property line, and a footprint no larger than the main dwelling's
• Architecture complementary to the main dwelling
• Conversion of an existing accessory building allowed when it conforms, or is made to conform, to every requirement of the section
• A certificate of occupancy before the unit is used as a dwelling
• No more than 1,250 square feet of living area
• One off-street parking space for a unit smaller than 650 square feet, and two for one of 650 square feet or larger

Utah's ADU statutes apply in Highland as well, as our ADU page explains.

Sources: Highland Development Code, Section 3-624; Ordinance O-2026-28; Detached ADU Checklist. We confirm the lot size, setbacks, and parking for your property against Section 3-624 during preconstruction.

Utah ADU Law and Building Code