Question 1

What building codes does Arizona enforce statewide?

Accepted Answer

Arizona adopts the ICC family of codes at the state level, including the 2021 IBC, IRC, IMC, IPC, IFC, and IECC, and the 2023 NEC. Counties and cities may adopt more recent editions or add local amendments on top of the state baseline.

Question 2

Do Arizona cities and counties adopt their own code editions?

Accepted Answer

Yes. Arizona allows local jurisdictions to adopt code editions that differ from the state baseline. Maricopa County, Phoenix, Scottsdale, and other jurisdictions frequently adopt newer editions or add local amendments — always check the specific AHJ for the project location.

Question 3

Who is the authority having jurisdiction (AHJ) in Arizona?

Accepted Answer

The AHJ varies by location and project type. For licensed contractor oversight, the Arizona Registrar of Contractors (ROC) is the state authority. For building permits and inspections, the local city or county building department is typically the AHJ.

Arizona Compliance Requirements

What does Arizona enforce statewide?

Jurisdictions in Arizona

Counties

Cities

Frequently asked questions

Discipline	Code	Edition	Adopted	Source
Electrical	NEC	2023	2024-07-01	View source
Building	IBC	2021	2023-01-01	—
Residential	IRC	2021	2023-01-01	—
Mechanical	IMC	2021	2023-01-01	—
Plumbing	IPC	2021	2023-01-01	—
Fire	IFC	2021	2023-01-01	—
Energy	IECC	2021	2023-01-01	—