General Contractor in Santaquin, Utah

Section 10.16.080 of the Santaquin City Code allows one ADU per parcel, attached or detached, on an owner-occupied single-family property where the owner keeps either dwelling as a primary residence. For an attached ADU, the section sets these conditions.

• An attached ADU in any residential zone, only on a parcel with a single-family dwelling
• One off-street parking space for the unit's residents
• Up to two meters for each water and pressurized irrigation service
• Construction and remodeling that meet the building codes in effect at the time
• In a new home approved with an attached ADU, no separate entrance for the unit on the front or a street-facing side; a unit in an existing home may use existing entrances on any side
• A building permit, with a site plan drawn to scale showing the property lines and dimensions, existing buildings and their entrances, proposed buildings or additions with their distances to the property lines, parking stalls, and utility meters; and floor plans with every room's use labeled
• A permit for a preexisting attached unit when it is built on, is remodeled, or changes use, with an unpermitted unit inspected for life safety violations
• Basement rentals, caretaker apartments, and similar units counted as attached ADUs, a permitted use in every zone that permits single-family dwellings

Ordinance 09-01-2026, adopted September 15, 2026, and in effect since September 16, rewrote the detached ADU rules. A detached ADU is now permitted in the Main Street Residential area of the Main Street Business District zone and in the R-8 and R-10 zones. It is also permitted on any lot or parcel of 11,000 square feet or more that holds a single-family dwelling in another zone where that dwelling is a permitted use. The ordinance sets these conditions for it.

• A unit in the rear yard only, never subdivided from the home or sold separately, with the owner occupying either the home or the unit and no lease longer than two years without a renewal agreement
• A footprint of no more than 800 square feet and a total of no more than 1,600 square feet; a height no greater than the home's or 24 feet, whichever is less; and setbacks of at least 12 feet from the home and 10 feet from the side and rear property lines
• A permanent foundation, with recreational vehicles and mobile homes excluded
• An architectural style and color compatible with the home
• A unit connected to a detached garage, with the two together no taller than 24 feet whatever the home's height; no more than 1,600 square feet for the unit, garage area included; and any carport left out of that square footage but held to the same setbacks from the home and the side and rear property lines
• At least two off-street parking spaces for a unit of 650 square feet or more and one for a smaller unit, with tandem spaces not counted
• A home with a detached ADU allowed up to two meters for each water and pressurized irrigation service
• A trash can for the unit
• Building, fire, and health codes in effect at the time of construction
• A building permit with the same site plan and floor plans an attached unit needs
• The same permit and inspection rules for a preexisting unit

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

Sources: Santaquin City Code, Section 10.16.080; Ordinance 09-01-2026; Ordinance 02-03-2026. The online code did not yet show Ordinance 09-01-2026 in October 2026. The detached rules above come from the adopted ordinance. We confirm them for your lot with the city during preconstruction.

Utah ADU Law and Building Code