Utah building code
Utah has adopted 2024 IBC based on 2024 IBC (incl. Appendices C and J). The table below lists the governing edition for every discipline a plan check touches, followed by the Utah cities and counties that amend it locally.
- Current edition
- 2024 I-Codes (IBC/IPC/IMC/IFGC/IECC/IEBC/IFC/ISPSC-res) + 2023 NEC + 2021 IRC, Utah Code Title 15A, effective 2026-07-01
- Prior edition
- 2021 I-Codes (IBC, IRC, IPC, IMC, IFGC, IECC, IEBC, ISPSC-res) with 2023 NEC (version of 15A-2-103 effective 7/1/2025)
- Code authority
- Utah Legislature via Utah Code Title 15A (State Construction and Fire Codes Act); administered by the Division of Professional Licensing (DOPL) for construction codes and the Utah Fire Prevention Board / State Fire Marshal Division for the State Fire Code
Edition changeover: Projects with a complete application on or before 2026-06-30 may still be reviewed under the 2021 I-Codes (IBC, IRC, IPC, IMC, IFGC, IECC, IEBC, ISPSC-res) with 2023 NEC (version of 15A-2-103 effective 7/1/2025).
Adopted code by discipline
| Discipline | Adopted code | Local amendment |
|---|---|---|
| Building | 2024 IBC based on 2024 IBC (incl. Appendices C and J) | n/a |
| Residential | 2021 IRC based on 2021 IRC (incl. Appendix AQ; Appendix AE/F per statute) | n/a |
| Existing buildings | 2024 IEBC | n/a |
| Fire | 2024 IFC based on 2024 IFC (excluding appendices) | n/a |
| Electrical | 2023 NEC based on NFPA 70, 2023 edition | n/a |
| Mechanical | 2024 IMC | n/a |
| Plumbing | 2024 IPC | n/a |
| Energy | 2024 IECC | n/a |
| Fuel Gas | 2024 IFGC | n/a |
Overlays that can apply
Mapped hazard and district overlays stack on top of the adopted code. These are the overlays recorded for Utah. They apply by parcel, not jurisdiction-wide, so confirm the parcel before assuming one is in play. Check CAL FIRE's fire hazard severity viewer and FEMA's flood map service.
- Seismic design category overlay
- Wildland-urban interface area
Sources
- https://le.utah.gov/xcode/Title15A/Chapter2/C15A-2_1800010118000101.pdf
- https://le.utah.gov/xcode/Title15A/Chapter5/C15A-5_1800010118000101.pdf
- https://le.utah.gov/xcode/Title15A/Chapter3/15a-3.html
- https://le.utah.gov/xcode/Title15A/Chapter2/C15A-2-S103_2025070120250507.pdf
- https://www.iccsafe.org/adoptions
- https://le.utah.gov/xcode/Title15A/15A.html
Common questions
What building code does Utah use?
Utah uses 2024 IBC based on 2024 IBC (incl. Appendices C and J). It is administered by the Utah Legislature via Utah Code Title 15A (State Construction and Fire Codes Act); administered by the Division of Professional Licensing (DOPL) for construction codes and the Utah Fire Prevention Board / State Fire Marshal Division for the State Fire Code. The prior edition was 2021 I-Codes (IBC, IRC, IPC, IMC, IFGC, IECC, IEBC, ISPSC-res) with 2023 NEC (version of 15A-2-103 effective 7/1/2025).
Do cities in Utah amend the state code?
Local amendments are adopted by ordinance at the city or county level. Confirm with the building department that reviews your permit.
Which edition applies to a permit already in review in Utah?
Projects with a complete application on or before 2026-06-30 may still be reviewed under the 2021 I-Codes (IBC, IRC, IPC, IMC, IFGC, IECC, IEBC, ISPSC-res) with 2023 NEC (version of 15A-2-103 effective 7/1/2025).
Check a plan set against Utah code
Knowing the adopted edition is the easy half. Architechtura reads your drawings, resolves which of these provisions actually apply to the project, and returns the corrections a plan checker would write up, each one cited to the section it came from.
Your first check is free, no card required.
Compiled from published state and municipal adoption ordinances. Local governments amend their codes on their own schedule, and a pending ordinance can change what applies to your permit. Confirm the governing edition with the building department before you submit. This page is reference information, not a code determination.