How many states currently have a IRC record in this dataset?
48 US jurisdictions have a current record under the IRC identifier. This count describes the dataset and is not a legal conclusion about every local jurisdiction.
International Residential Code (IRC) State Adoption Reference
Review current International Residential Code adoption records across 48 US jurisdictions, with editions, effective dates, amendments, and official references.
The table reports the latest active record per US jurisdiction in MeltPlan's source data. Confirm applicability with the authority having jurisdiction.
Current IRC records by state
| State | Base model code | Publisher | Effective | Adoption type | Reference |
|---|---|---|---|---|---|
| Alabama | 2015 International Residential Code (IRC) | ICC | Oct 1, 2016 | Amended | Official source |
| Alaska | 2018 International Residential Code (IRC) | ICC | Nov 28, 2018 | Amended | Official source |
| Arizona | 2024 International Residential Code (IRC) | ICC | Not listed | Standard | Not listed |
| Arkansas | 2021 International Residential Code (IRC) | ICC | Jan 1, 2023 | Custom | Official source |
| California | 2024 International Residential Code (IRC) | ICC | Jan 1, 2026 | Custom | Official source |
| Colorado | 2024 International Residential Code (IRC) | ICC | Not listed | Standard | Not listed |
| Connecticut | 2021 International Residential Code (IRC) | ICC | Oct 1, 2022 | Custom | Official source |
| Delaware | 2018 International Residential Code (IRC) | ICC | Not listed | Standard | Not listed |
| District of Columbia | 2015 International Residential Code (IRC) | ICC | May 29, 2020 | Amended | Official source |
| Florida | 2021 International Residential Code (IRC) | ICC | Dec 31, 2023 | Custom | Official source |
| Georgia | 2024 International Residential Code (IRC) | ICC | Jan 1, 2026 | Amended | Official source |
| Hawaii | 2018 International Residential Code (IRC) | ICC | Apr 20, 2021 | Amended | Official source |
| Idaho | 2018 International Residential Code (IRC) | ICC | Jan 1, 2021 | Custom | Official source |
| Illinois | 2018 International Residential Code (IRC) | ICC | Not listed | Standard | Not listed |
| Indiana | 2018 International Residential Code (IRC) | ICC | Dec 26, 2019 | Custom | Official source |
| Iowa | 2024 International Residential Code (IRC) | ICC | Sep 10, 2025 | Amended | Official source |
| Kansas | 2018 International Residential Code (IRC) | ICC | Not listed | Standard | Not listed |
| Kentucky | 2015 International Residential Code (IRC) | ICC | Jan 1, 2019 | Custom | Official source |
| Louisiana | 2021 International Residential Code (IRC) | ICC | Jan 1, 2023 | Custom | Official source |
| Maine | 2021 International Residential Code (IRC) | ICC | Apr 7, 2025 | Amended | Official source |
| Maryland | 2024 International Residential Code (IRC) | ICC | Nov 24, 2025 | Amended | Official source |
| Massachusetts | 2021 International Residential Code (IRC) | ICC | Oct 11, 2024 | Custom | Official source |
| Michigan | 2015 International Residential Code (IRC) | ICC | Feb 8, 2016 | Custom | Official source |
| Minnesota | 2018 International Residential Code (IRC) | ICC | Mar 31, 2020 | Custom | Official source |
| Mississippi | 2024 International Residential Code (IRC) | ICC | Not listed | Standard | Not listed |
| Missouri | 2018 International Residential Code (IRC) | ICC | Not listed | Standard | Not listed |
| Montana | 2021 International Residential Code (IRC) | ICC | Jun 11, 2022 | Amended | Official source |
| Nebraska | 2018 International Residential Code (IRC) | ICC | Sep 1, 2019 | Amended | Official source |
| Nevada | 2024 International Residential Code (IRC) | ICC | Not listed | Standard | Not listed |
| New Hampshire | 2021 International Residential Code (IRC) | ICC | Jul 1, 2024 | Custom | Official source |
| New Jersey | 2021 International Residential Code (IRC) | ICC | Sep 6, 2022 | Custom | Official source |
| New Mexico | 2021 International Residential Code (IRC) | ICC | Jul 14, 2023 | Amended | Official source |
| New York | 2024 International Residential Code (IRC) | ICC | Dec 31, 2025 | Custom | Official source |
| North Carolina | 2015 International Residential Code (IRC) | ICC | Jan 1, 2019 | Custom | Official source |
| North Dakota | 2024 International Residential Code (IRC) | ICC | Jan 1, 2026 | Amended | Official source |
| Ohio | 2018 International Residential Code (IRC) | ICC | Not listed | Custom | Official source |
| Oklahoma | 2018 International Residential Code (IRC) | ICC | Sep 14, 2022 | Custom | Official source |
| Oregon | 2021 International Residential Code (IRC) | ICC | Oct 1, 2023 | Custom | Official source |
| Pennsylvania | 2021 International Residential Code (IRC) | ICC | Jan 1, 2026 | Amended | Official source |
| Rhode Island | 2021 International Residential Code (IRC) | ICC | Dec 1, 2025 | Custom | Official source |
| South Carolina | 2021 International Residential Code (IRC) | ICC | Jan 1, 2023 | Custom | Official source |
| South Dakota | 2021 International Residential Code (IRC) | ICC | Jul 1, 2022 | Standard | Official source |
| Tennessee | 2018 International Residential Code (IRC) | ICC | Jul 16, 2020 | Amended | Official source |
| Texas | 2021 International Residential Code (IRC) | ICC | Not listed | Standard | Not listed |
| Utah | 2021 International Residential Code (IRC) | ICC | Jul 1, 2023 | Custom | Official source |
| Virginia | 2021 International Residential Code (IRC) | ICC | Jan 18, 2024 | Custom | Official source |
| Washington | 2021 International Residential Code (IRC) | ICC | Mar 15, 2024 | Custom | Official source |
| West Virginia | 2018 International Residential Code (IRC) | ICC | Aug 1, 2022 | Amended | Official source |
IRC adoption questions
Which IRC editions appear in the current records?
The edition years represented are 2024, 2021, 2018, 2015. A project may be governed by a different edition because of local amendments or transition rules.
Does a IRC state record apply in every city or county?
Not necessarily. Home-rule authority, local amendments, project type, occupancy, and enforcement dates may change which requirements apply.
How should I verify a IRC adoption?
Open the official source where one is listed, then confirm the adopted edition, amendments, effective date, and project jurisdiction with the authority having jurisdiction.