Codes of Record

International Energy Conservation Code, residential

Arizona leaves the IECC residential to cities and counties

Arizona leaves the IECC residential to cities and counties. Adopted by County boards of supervisors and city or town councils (each adopts its own code). The legal citation is A.R.S. 9-802 (municipal adoption by reference); A.R.S. 11-861 (county adoption by reference); A.R.S. 34-461 (public buildings).

Record of adoption

Edition in force

Local adoption

Partial

Legal citation
A.R.S. 9-802 (municipal adoption by reference); A.R.S. 11-861 (county adoption by reference); A.R.S. 34-461 (public buildings)
Adopted by
County boards of supervisors and city or town councils (each adopts its own code)
Second reading
Applies
Local option

No state residential energy code for site-built private construction was found; for context, Tucson lists the 2024 IECC effective Jul 1, 2026.

Exceptions

  • Factory-built buildings and manufactured homes are regulated by the Arizona Department of Housing, Office of Manufactured Housing (4 A.A.C. 34); R4-34-102 lists the 2018 IECC.
  • State-owned buildings are excepted from the local-code requirement for public buildings in A.R.S. 34-461.

How Arizona adopts the IECC residential

  • Local ordinances

Each county board of supervisors (A.R.S. 11-861) and each city or town (A.R.S. 9-802) adopts model codes by ordinance, usually by reference, and sets its own amendments and timing. No statewide adoption step or schedule for private construction was found.

Cycle. Set by each jurisdiction with no state schedule; adoption dates vary by city, town and county.

Laws, rulings, and other actions

  1. Other action
    Office of Manufactured Housing adoption of the 2024 I-Codes and 2023 NEC for factory-built buildings (reported; effective date shown)

    Reportedly replaces the 2018 I-Codes and 2017 NEC that 4 A.A.C. 34 lists for factory-built buildings and manufactured homes; it does not govern site-built construction.

How it was checked

Partial

Researched in the state’s own record. The seal stays broken until the passage is on file word for word.

Read twice: a second, blind reading of the state’s record agreed with the first on .

The state’s record was last read on , from six source pages.

Evidence 6 sources

Sources for the record itself come first, the state’s own records ahead of others. A label marks a source about something else, such as an exception. A source marked secondary is not the state’s own record.

  • “A municipality may enact the provisions of a code or public record theretofore in existence without setting forth the provisions”

    9-802. Procedure for adoption by referenceArizona Legislatureazleg.gov (opens in a new tab)StatuteRetrieved

  • “11-861. Adoption of codes by reference; limitations; method of adoption; fire sprinklers; fire apparatus access roads”

    11-861. Adoption of codes by reference; limitations; method of adoption; fire sprinklers; fire apparatus access roadsArizona Legislatureazleg.gov (opens in a new tab)StatuteRetrieved

  • About an exception

    “International Building Code (IBC), 2018 edition”

    “International Residential Code (IRC), 2018 edition”

    “International Energy Conservation Code (IECC), 2018 edition”

    “National Electrical Code (NEC), 2017 edition”

    Arizona Administrative Code, Title 4, Chapter 34 (Board of Manufactured Housing, Supp. 21-3), R4-34-102 Materials Incorporated by ReferenceArizona Secretary of Stateapps.azsos.gov (opens in a new tab)Administrative codeRetrieved

  • About an exception

    “Subsections A and B of this section do not apply to state owned buildings”

    34-461. Applicability of local codes; exceptions; definition (state owned buildings)Arizona Legislatureazleg.gov (opens in a new tab)StatuteRetrieved

  • About an exception

    Office of Manufactured Housing: Current Adopted Codes (as of February 1, 2021)Arizona Department of Housing (Office of Manufactured Housing)housing.az.gov (opens in a new tab)Agency pageRetrieved

  • About the note

    “2024 International Building Code (effective 1/1/26)”

    “2024 International Residential Code (effective 1/1/26)”

    “2024 International Energy Conservation Code (effective 7/1/26)”

    “2023 National Electric Code (effective 1/1/26)”

    Building Codes (City of Tucson Planning and Development Services); context only, not a state valueCity of Tucsontucsonaz.gov (opens in a new tab)Agency pageRetrieved

Tracker cross-checks

Code adoption trackers are a cross-check. They are not Arizona’s own record.

  • BCAP’s code status pageCross-checkAgrees with the record

    Arizona is a home rule state and does not have a mandatory statewide energy code.

    bcapcodes.org (opens in a new tab)Read

Related pages

Other codes in Arizona