Utah — Code Adoption Summary
Adoption model: Statewide-mandatory (Utah State Construction Code = the I-Codes + NEC + binding UT legislative amendments — not a separately-written state code document).
Last verified: 2026-07-03
Confidence: verified
Primary sources: Utah Code Title 15A — https://le.utah.gov/xcode/Title15A · ICC UT
Statewide adopted codes — effective 2023-07-01
| Code family | Adopted edition | Notes | Source |
|---|
| Building | 2021 IBC + UT amendments | | up.codes/utah |
| Residential / Mechanical / Plumbing / Fuel Gas | 2021 IRC/IMC/IPC/IFGC + UT amendments | UT = IPC | le.utah.gov |
| Electrical (NEC) | NEC 2020 + UT amendments | one cycle behind the 2021 I-Codes | le.utah.gov |
| Energy | 2021 IECC + UT amendments | | " |
Adoption model & precedence
- The "Utah State Construction Code" = the base I-Codes/NEC PLUS legally-binding Utah Legislature amendments — always consult both the base model code and the state amendment set.
- Codes are statewide-mandatory; local jurisdictions enforce with limited additional amendment authority.
- AHJ = local building department, applying the statewide edition + amendments.
Major cities / counties
| Jurisdiction | County | Notes | Building dept. |
|---|
| Salt Lake City | Salt Lake | statewide code | slc.gov |
| West Valley City | Salt Lake | statewide code | wvc-ut.gov |
| Provo | Utah | statewide code | provo.org |
AHJ fallback (when local adoption is unverified)
- State baseline (certain, eff. 2023-07-01): 2021 IBC/IRC/IMC/IPC/IECC, NEC 2020, all + UT legislative amendments.
- Action: always check the specific UT legislative amendment set alongside the base model code — Utah's amendments are legally binding and can meaningfully change requirements.
Change log
- 2026-07-03 — created; verified 2021 I-Codes + NEC 2020 (eff. 2023-07-01) + binding UT legislative amendments structure.
