How many states currently have a IMC record in this dataset?
45 US jurisdictions have a current record under the IMC identifier. This count describes the dataset and is not a legal conclusion about every local jurisdiction.
International Mechanical Code (IMC) State Adoption Reference
Review current International Mechanical Code adoption records across 45 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 IMC records by state
| State | Base model code | Publisher | Effective | Adoption type | Reference |
|---|---|---|---|---|---|
| Alabama | 2021 International Mechanical Code (IMC) | ICC | Jul 1, 2022 | Amended | Official source |
| Alaska | 2021 International Mechanical Code (IMC) | ICC | Oct 28, 2022 | Custom | Official source |
| Arizona | 2024 International Mechanical Code (IMC) | ICC | Not listed | Standard | Not listed |
| Arkansas | 2021 International Mechanical Code (IMC) | ICC | Jan 1, 2023 | Amended | Official source |
| Colorado | 2024 International Mechanical Code (IMC) | ICC | Not listed | Standard | Not listed |
| Connecticut | 2021 International Mechanical Code (IMC) | ICC | Oct 1, 2022 | Amended | Official source |
| Delaware | 2018 International Mechanical Code (IMC) | ICC | Feb 1, 2020 | Standard | Not listed |
| District of Columbia | 2015 International Mechanical Code (IMC) | ICC | May 29, 2020 | Amended | Official source |
| Florida | 2021 International Mechanical Code (IMC) | ICC | Dec 31, 2023 | Custom | Official source |
| Georgia | 2024 International Mechanical Code (IMC) | ICC | Jan 1, 2026 | Amended | Official source |
| Idaho | 2018 International Mechanical Code (IMC) | ICC | Jan 1, 2021 | Amended | Official source |
| Illinois | 2018 International Mechanical Code (IMC) | ICC | Not listed | Standard | Not listed |
| Indiana | 2012 International Mechanical Code (IMC) | ICC | Dec 1, 2014 | Amended | Official source |
| Iowa | 2024 International Mechanical Code (IMC) | ICC | Mar 26, 2025 | Amended | Official source |
| Kansas | 2018 International Mechanical Code (IMC) | ICC | Not listed | Standard | Not listed |
| Kentucky | 2015 International Mechanical Code (IMC) | ICC | Jan 1, 2019 | Standard | Official source |
| Louisiana | 2021 International Mechanical Code (IMC) | ICC | Jan 1, 2023 | Custom | Official source |
| Maine | 2021 International Mechanical Code (IMC) | ICC | Apr 7, 2025 | Amended | Official source |
| Maryland | 2021 International Mechanical Code (IMC) | ICC | May 26, 2023 | Standard | Official source |
| Massachusetts | 2021 International Mechanical Code (IMC) | ICC | Oct 11, 2024 | Custom | Official source |
| Michigan | 2021 International Mechanical Code (IMC) | ICC | Mar 12, 2024 | Custom | Official source |
| Minnesota | 2018 International Mechanical Code (IMC) | ICC | Apr 6, 2020 | Custom | Official source |
| Mississippi | 2024 International Mechanical Code (IMC) | ICC | Not listed | Standard | Not listed |
| Missouri | 2018 International Mechanical Code (IMC) | ICC | Not listed | Standard | Not listed |
| Montana | 2021 International Mechanical Code (IMC) | ICC | Jun 11, 2022 | Amended | Official source |
| New Hampshire | 2021 International Mechanical Code (IMC) | ICC | Jul 1, 2024 | Custom | Official source |
| New Jersey | 2021 International Mechanical Code (IMC) | ICC | Sep 6, 2022 | Amended | Official source |
| New York | 2024 International Mechanical Code (IMC) | ICC | Dec 31, 2025 | Custom | Official source |
| New York City | 2015 International Mechanical Code (IMC) | ICC | Nov 7, 2022 | Custom | Official source |
| North Carolina | 2015 International Mechanical Code (IMC) | ICC | Jan 1, 2019 | Custom | Official source |
| North Dakota | 2024 International Mechanical Code (IMC) | ICC | Jan 1, 2026 | Amended | Official source |
| Ohio | 2021 International Mechanical Code (IMC) | ICC | Mar 1, 2024 | Custom | Official source |
| Oklahoma | 2018 International Mechanical Code (IMC) | ICC | Sep 14, 2021 | Custom | Official source |
| Oregon | 2024 International Mechanical Code (IMC) | ICC | Oct 1, 2025 | Custom | Official source |
| Pennsylvania | 2021 International Mechanical Code (IMC) | ICC | Jan 1, 2026 | Standard | Official source |
| Rhode Island | 2021 International Mechanical Code (IMC) | ICC | Dec 1, 2025 | Custom | Official source |
| South Carolina | 2021 International Mechanical Code (IMC) | ICC | Jan 1, 2023 | Custom | Official source |
| South Dakota | 2015 International Mechanical Code (IMC) | ICC | Oct 17, 2016 | Amended | Official source |
| Tennessee | 2021 International Mechanical Code (IMC) | ICC | Apr 17, 2025 | Standard | Official source |
| Utah | 2021 International Mechanical Code (IMC) | ICC | Jul 1, 2023 | Custom | Official source |
| Virginia | 2021 International Mechanical Code (IMC) | ICC | Jan 18, 2024 | Custom | Official source |
| Washington | 2021 International Mechanical Code (IMC) | ICC | Mar 15, 2024 | Custom | Official source |
| West Virginia | 2018 International Mechanical Code (IMC) | ICC | Aug 1, 2022 | Amended | Official source |
| Wisconsin | 2021 International Mechanical Code (IMC) | ICC | Sep 1, 2025 | Amended | Official source |
| Wyoming | 2024 International Mechanical Code (IMC) | ICC | Jun 26, 2024 | Standard | Official source |
IMC adoption questions
Which IMC editions appear in the current records?
The edition years represented are 2024, 2021, 2018, 2015, 2012. A project may be governed by a different edition because of local amendments or transition rules.
Does a IMC 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 IMC 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.