General Contractor in Clinton, Utah

Section 28-3-27 of the Clinton City Code, as amended by Ordinance 26-02Z on August 25, 2026, sets conditions for internal, attached, and detached ADUs that include these, in its own order.

• A permitted use in primary dwellings and on lots under owner occupancy in the R-1 (single-family) and A (agricultural) zones, and in existing single-family homes in the PZ (performance) zone
• No ADU where the primary dwelling is served by a failing septic tank
• A preliminary site plan, drawn to scale but allowed as a hand-drawn sketch, reviewed by the Community Development Department before the formal building permit application
• An ADU permit application through the city's online building permit portal, with documentation that the property is owner occupied; a to-scale site plan showing every building on the lot and the required off-street parking; floor plans; and the structural, electrical, and mechanical specifications and drawings, along with a satisfactory property and building inspection and the necessary building permits
• An exemption form, completed and recorded, in place of an ADU permit for a part of the home with the characteristics of a separate unit that no second family occupies
• Compliance with the other building, zoning, and fire code requirements, and Fire Department review of each ADU permit for access and safety under city rules and the International Fire Code
• A Residential Rental Dwelling license for the owner when the ADU occupant pays rent
• A notice the city records with the county recorder, with a copy delivered to the owner
• The record owner, including titleholders and contract purchasers, living in the primary dwelling or the ADU as a permanent residence, never receiving rent for that unit, and showing that residence by affidavit
• No owner occupancy required during a bona fide temporary absence of three years or less for a temporary work assignment, sabbatical, or voluntary service, under the conditions the section sets
• No short-term rental for fewer than 30 consecutive days
• One ADU per lot or property
• A design and size that meet all current applicable codes, with a new ADU in or attached to an existing home brought up to all minimum standards, as city staff inspect and approve
• No separate utility meters
• The address of the primary dwelling, with Unit B added
• No ADU in a mobile home, a mobile home community, or a recreational vehicle, and every ADU on a permanent foundation that meets the currently adopted International Residential Code, frost protection included, never on a chassis or any other temporary foundation
• Detached ADUs and other detached structures covering no more than 25 percent of the rear yard combined, with existing patios, driveways, sport courts, and other impervious surfaces in the rear yard counted toward that limit
• A two-story detached ADU allowed within the chapter's living space limit, which also caps the second-story habitable area when the first story is a garage or other non-habitable space
• A detached ADU no more than 150 feet from a public roadway, measured from the roadway's edge to the midpoint of its farthest exterior wall along the shortest approved access route, unless the Fire Marshal approves an exception where an approved fire apparatus access road is provided under the currently adopted International Fire Code
• One off-street parking space for the ADU beyond the home's required parking, and never fewer than three off-street stalls on a property with an ADU
• Covered parking replaced when an ADU is created within an existing garage or carport
• An attached garage or carport on a detached ADU only when the structure's footprint stays within the zone's rear yard impervious surface ratio and meets the setbacks
• Garage interior dimensions of at least 10 by 20 feet for a single-car space or 20 by 20 feet for a two-car space, no more than 25 by 30 feet or 750 square feet for a two-car space, and the garage used only for vehicles and storage
• A concrete or asphalt driveway to a detached ADU garage, no wider than the garage, reached by a concrete driveway approach under its own Public Works permit, with no added parking beside the ADU driveway or structure

Table 3.27.1 and its notes set these standards.

• An internal ADU inside the home, held to the same height limit and setbacks as the home, with a side or rear entrance and no size limit
• An attached ADU held to the home's height limit and setbacks, with a side or rear entrance
• An attached or detached ADU of no more than 50 percent of the home's living space, up to 1,500 square feet, with parking, unfinished and unpermitted basements, and non-habitable storage areas left out of the count
• A detached ADU at least 10 feet from the home, with no restriction on where its entrance faces, up to 16 feet to the roof peak for one story or 25 feet for two, and never taller than the home at its roof peak
• Detached side setbacks matching the home's for a single story in the side yard area, 5 feet for a single story in the rear yard area, and 10 feet for two stories, with corner side setbacks matching the home's
• Detached rear setbacks of 10 feet for a single story, the home's own for two stories in the side yard area, and 20 feet for two stories in the rear yard area
• Entrance and exit doors of attached and detached ADUs in side yards set back 10 feet from the side property lines

Every ADU permit application carries a notarized affidavit signed by the record owner. A change of ownership calls for an updated ADU permit, a site inspection where it applies, and a new signed affidavit. Before an ADU permit is approved, the work under every required building permit is completed by the applicant and inspected by the city's Building Official or a designee. Where no further work is proposed or required to ready the unit for occupancy, the applicant still submits a building permit application, and the Building Official performs an inspection. If the primary dwelling's record owner changes without a new ADU application, or no longer resides there permanently, the section requires the ADU to be vacated immediately.

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

Sources: Clinton, Ordinance 26-02Z; City Council Minutes, August 25, 2026; City Codes and Ordinances; Utah Code 10-21-303; Utah Code 10-21-304; Utah Code 10-21-101. The online code had not absorbed Ordinance 26-02Z by October 22, 2026. The city states that an adopted ordinance controls until the code is formally updated. We confirm the current text of Section 28-3-27 for your lot during preconstruction.

Utah ADU Law and Building Code