Utah Building Permit Guides

Utah adopts one construction code for the whole state. The State Construction and Fire Codes Act, in Title 15A of the Utah Code, sets the code editions, and they apply in every city, town and county; cities and counties do not choose their own editions. Local amendments are written into state law by the Legislature, and only a few cities have them. Since 1 December 2016 cities and counties may not add rules that are stricter than the state code on a subject the code covers. So the question here is not which edition a city uses, because it is the same everywhere, but which local amendments, zoning rules, fire authority and service district apply on top of it.

The current code is split, and that matters on every project. On 1 July 2026 Utah moved the building, plumbing, mechanical, fuel gas, energy, existing building and residential swimming pool and spa codes to their 2024 editions. The residential code stayed on the 2021 edition, and the electrical code stayed on the 2023 National Electrical Code. So a commercial building is designed to a 2024 code while the house next door is still built to the 2021 residential code, and both are correct. Houses now follow Utah’s own energy chapter in the residential code, with one set of insulation values for the whole state. The fire code also moved to the 2024 International Fire Code on 1 July 2026.

Solar is reviewed on two tracks in Utah. The first is the building permit: the local building department reviews and inspects both sides of the work. The structural side covers the attachment detail, rail spacing, and whether the existing framing can carry the added weight; the electrical side covers conductors, overcurrent protection, rapid shutdown, labelling, and the service or supply-side connection. There is no separate state electrical permit and no state inspector to book.

The code edition does not change from place to place. The state code applies the 2023 National Electrical Code everywhere, and the state’s amendments to the residential code send solar and battery systems on houses to that code too.

The second track is interconnection, which the building department does not control. Rocky Mountain Power serves most of Utah. Many cities, including St. George, Provo, Logan and Murray, run their own electric utilities, and rural electric co-operatives such as Garkane Energy, Dixie Power and Moon Lake Electric serve large rural areas. Each utility sets its own application, meter and inspection steps, and permission to operate follows its schedule, so plan for the two tracks to finish at different times.

Plan on a permit for a roof covering replacement in Utah. The state code’s list of work that needs no permit does not include re-roofing, so do not assume a like-for-like replacement is exempt, and confirm with the local building department. On older buildings, re-roofing more than a quarter of a roof can require bracing for unreinforced masonry parapets in the higher seismic design categories.

There is no state approval number to cite on the application. The roof has to meet the state code and the manufacturer’s installation instructions, so keep those instructions on site.

Snow is the Utah-specific load. The state code sets ground snow loads by city and elevation, and they rise sharply in the mountains, so a change to a heavier roof covering can trigger a structural check. Ask the building department which inspections it needs, and do not cover work before it has been seen.

Utah law gives applicants a way around a slow inspection queue. A city or county that charges an inspection fee must inspect promptly. If it cannot inspect within three business days of your request, you may hire a third-party inspection firm from the city’s or county’s approved list; a firm on the list may use a building inspector from a neighbouring city or county. Before you hire the firm, you must tell the building department which firm you intend to use. The firm sends its inspection report to the building department, which pays the firm for the inspection, and once the firm finishes and reports, the building department must issue the certificate of occupancy. If you ask for an inspection on a date more than three days away, a city must inspect on that date.