Taylorsville, UT Accessory Structures: ADU Rules (2026)

Under Taylorsville City Code Section 13.11.010, an internal ADU must sit entirely within the building footprint of a detached single-family dwelling; it cannot be added to a duplex, triplex, apartment building, or any structure holding more than one dwelling unit, and it cannot be placed in a mobile home. The lot must measure 6,000 square feet or more, and only one ADU is permitted per lot. A homeowner must provide at least one off-street parking space dedicated to the ADU, on top of the parking already required for the primary house, meeting the City's general parking standards.

The ADU must be designed so the home still reads as a single-family dwelling from the street: no separate utility meter and no separate mailing address are allowed. Before occupancy, the owner must pull a building permit and satisfy a checklist of International Residential Code items, including separate living facilities with permanent cooking and bathing space (IRC 202), a minimum 32-inch side-hinged entry door that bypasses the garage (IRC 311), half-inch gypsum fire separation between the ADU and the main unit (IRC 302.3), independent access to plumbing, HVAC, and electrical controls (IRC 1305.1 and 2005.2.1), a licensed HVAC professional's sufficiency statement, separated electrical branch circuits, emergency egress openings in sleeping rooms, and interconnected smoke and carbon monoxide detectors.

Community Development enforces the standards, and the city can record notice of the ADU restrictions against the property title through Salt Lake County so future buyers are on notice.