Resources
US Building Code Adoption by State
Which edition of the IBC, IRC, IECC and IFC each US state enforces, checked against every state's own code publication on 1 October 2026.
On this page
“Which code applies?” is the first question on any project and the one most often answered from memory. It has three parts, and only the first is national: which edition the jurisdiction adopted, when it became effective, and which amendments ride on top of it.
These pages answer the first part for all fifty states and the District of Columbia from a record checked against each state's own code publication on 1 October 2026, with the source linked on every page. The ICC Master I-Code Adoption Chart (January 2024) stays on each page as the 17-code cross-state comparison, labelled with its date.
The other two parts cannot be answered nationally, so each page ends where the answer actually lives: the state's own current-code publication, the amendment list, and a worksheet for recording what the authority having jurisdiction confirmed.
Prepared by Harth as generated collection navigation. Evidence and review scope are recorded on each linked page.
Pages
- Alabama Building Code: Which Editions Are Adopted
- Alaska Building Code: Which Editions Are Adopted
- Arizona Building Code: Which Editions Are Adopted
- Arkansas Building Code: Which Editions Are Adopted
- California Building Code: Which Editions Are Adopted
- Colorado Building Code: Which Editions Are Adopted
- Connecticut Building Code: Which Editions Are Adopted
- Delaware Building Code: Which Editions Are Adopted
- District of Columbia Building Code: Which Editions Are Adopted
- Florida Building Code: Which Editions Are Adopted
- Georgia Building Code: Which Editions Are Adopted
- Hawaii Building Code: Which Editions Are Adopted
- Idaho Building Code: Which Editions Are Adopted
- Illinois Building Code: Which Editions Are Adopted
- Indiana Building Code: Which Editions Are Adopted
- Iowa Building Code: Which Editions Are Adopted
- Kansas Building Code: Which Editions Are Adopted
- Kentucky Building Code: Which Editions Are Adopted
- Louisiana Building Code: Which Editions Are Adopted
- Maine Building Code: Which Editions Are Adopted
- Maryland Building Code: Which Editions Are Adopted
- Massachusetts Building Code: Which Editions Are Adopted
- Michigan Building Code: Which Editions Are Adopted
- Minnesota Building Code: Which Editions Are Adopted
- Mississippi Building Code: Which Editions Are Adopted
- Missouri Building Code: Which Editions Are Adopted
- Montana Building Code: Which Editions Are Adopted
- Nebraska Building Code: Which Editions Are Adopted
- Nevada Building Code: Which Editions Are Adopted
- New Hampshire Building Code: Which Editions Are Adopted
- New Jersey Building Code: Which Editions Are Adopted
- New Mexico Building Code: Which Editions Are Adopted
- New York Building Code: Which Editions Are Adopted
- North Carolina Building Code: Which Editions Are Adopted
- North Dakota Building Code: Which Editions Are Adopted
- Ohio Building Code: Which Editions Are Adopted
- Oklahoma Building Code: Which Editions Are Adopted
- Oregon Building Code: Which Editions Are Adopted
- Pennsylvania Building Code: Which Editions Are Adopted
- Rhode Island Building Code: Which Editions Are Adopted
- South Carolina Building Code: Which Editions Are Adopted
- South Dakota Building Code: Which Editions Are Adopted
- Tennessee Building Code: Which Editions Are Adopted
- Texas Building Code: Which Editions Are Adopted
- Utah Building Code: Which Editions Are Adopted
- Vermont Building Code: Which Editions Are Adopted
- Virginia Building Code: Which Editions Are Adopted
- Washington Building Code: Which Editions Are Adopted
- West Virginia Building Code: Which Editions Are Adopted
- Wisconsin Building Code: Which Editions Are Adopted
- Wyoming Building Code: Which Editions Are Adopted
- Alabama Building Code: Which Editions Are Adopted
Alabama: No single statewide building code; 2015 residential and energy codes set by the Alabama Energy and Residential Codes Bo…. Checked 2026-10-01 against the state source.
- Alaska Building Code: Which Editions Are Adopted
Alaska: 2021 International Building and Fire Codes with Alaska amendments, effective 28 October 2022; no statewide residential o…. Checked 2026-10-01 against the state source.
- Arizona Building Code: Which Editions Are Adopted
Arizona: No statewide building code; every city and county adopts its own. Checked 2026-10-01 against the state source, with the cross-state ICC record for comparison.
- Arkansas Building Code: Which Editions Are Adopted
Arkansas building code: 2021 Arkansas Fire Prevention Code (building, residential and fire volumes), effective 1 January 2023. Checked 2026-10-01 against the state source.
- California Building Code: Which Editions Are Adopted
California building code: 2025 California Building Standards Code (Title 24), effective 1 January 2026. Checked 2026-10-01 against the state source.
- Colorado Building Code: Which Editions Are Adopted
Colorado building code: No statewide building code; local jurisdictions adopt, with a state-mandated energy-code floor. Checked 2026-10-01 against the state source.
- Connecticut Building Code: Which Editions Are Adopted
Connecticut: 2022 Connecticut State Building Code, effective 1 October 2022. Checked 2026-10-01 against the state source, with the cross-state ICC record for comparison.
- Delaware Building Code: Which Editions Are Adopted
Delaware: No statewide building code; counties adopt their own, under a statewide 2024 IECC energy code effective 11 April 2026. Checked 2026-10-01 against the state source.
- District of Columbia Building Code: Which Editions Are Adopted
District of Columbia building code: 2017 District of Columbia Construction Codes, effective 29 May 2020. Checked 2026-10-01 against the state source.
- Florida Building Code: Which Editions Are Adopted
Florida: Florida Building Code, 8th Edition (2023), effective 31 December 2023. Checked 2026-10-01 against the state source, with the cross-state ICC record for comparison.
- Georgia Building Code: Which Editions Are Adopted
Georgia building code: 2024 I-Codes as the Georgia State Minimum Standard Codes, effective 1 January 2026. Checked 2026-10-01 against the state source.
- Hawaii Building Code: Which Editions Are Adopted
Hawaii: 2018 Hawaii State Building Codes, adopted by the State Building Code Council between November 2020 and April 2021. Checked 2026-10-01 against the state source.
- Idaho Building Code: Which Editions Are Adopted
Idaho building code: 2018 I-Codes as the Idaho building codes, applied by every local government that enforces building codes. Checked 2026-10-01 against the state source.
- Illinois Building Code: Which Editions Are Adopted
Illinois building code: No statewide building code; a statewide energy code based on the 2024 IECC took effect 30 November 2025. Checked 2026-10-01 against the state source.
- Indiana Building Code: Which Editions Are Adopted
Indiana: 2014 Indiana Building Code (2012 IBC basis), effective 1 December 2014, with the 2020 Indiana Residential Code (2018 IR…. Checked 2026-10-01 against the state source.
- Iowa Building Code: Which Editions Are Adopted
Iowa: 2024 Iowa State Building Code (2024 IBC and IRC), effective 10 September 2025, with a statewide energy code still on the 2…. Checked 2026-10-01 against the state source.
- Kansas Building Code: Which Editions Are Adopted
Kansas building code: No statewide commercial building code; only the Kansas Fire Prevention Code is mandatory statewide. Checked 2026-10-01 against the state source.
- Kentucky Building Code: Which Editions Are Adopted
Kentucky building code: 2018 Kentucky Building Code and Kentucky Residential Code, built on the 2015 IBC and IRC. Checked 2026-10-01 against the state source.
- Louisiana Building Code: Which Editions Are Adopted
Louisiana building code: 2021 I-Codes as the Louisiana State Uniform Construction Code, effective 1 January 2023. Checked 2026-10-01 against the state source.
- Maine Building Code: Which Editions Are Adopted
Maine building code: 2021 Maine Uniform Building and Energy Code (MUBEC), effective 7 April 2025. Checked 2026-10-01 against the state source.
- Maryland Building Code: Which Editions Are Adopted
Maryland building code: 2021 I-Codes as the Maryland Building Performance Standards, effective 29 May 2023. Checked 2026-10-01 against the state source.
- Massachusetts Building Code: Which Editions Are Adopted
Massachusetts building code: Massachusetts State Building Code (780 CMR), Tenth Edition, effective 11 October 2024. Checked 2026-10-01 against the state source.
- Michigan Building Code: Which Editions Are Adopted
Michigan: 2021 Michigan Building Code, effective 9 April 2025; homes still follow the 2015 Michigan Residential Code. Checked 2026-10-01 against the state source.
- Minnesota Building Code: Which Editions Are Adopted
Minnesota: 2020 Minnesota State Building Code, effective 31 March 2020. Checked 2026-10-01 against the state source, with the cross-state ICC record for comparison.
- Mississippi Building Code: Which Editions Are Adopted
Mississippi: No mandatory statewide building code; counties and cities choose whether to adopt one, and the State Fire Marshal a…. Checked 2026-10-01 against the state source.
- Missouri Building Code: Which Editions Are Adopted
Missouri: No statewide building code; every city and county adopts its own. Checked 2026-10-01 against the state source, with the cross-state ICC record for comparison.
- Montana Building Code: Which Editions Are Adopted
Montana building code: 2024 I-Codes as the Montana State Building Code, effective 26 September 2026. Checked 2026-10-01 against the state source.
- Nebraska Building Code: Which Editions Are Adopted
Nebraska: 2018 Nebraska state building code and 2018 IECC Nebraska Energy Code; localities adopt the state code or one that conf…. Checked 2026-10-01 against the state source.
- Nevada Building Code: Which Editions Are Adopted
Nevada building code: 2024 IECC adopted statewide effective 18 August 2024; building codes are otherwise adopted locally. Checked 2026-10-01 against the state source.
- New Hampshire Building Code: Which Editions Are Adopted
New Hampshire: 2024 New Hampshire State Building Code, effective 1 July 2026. Checked 2026-10-01 against the state source, with the cross-state ICC record for comparison.
- New Jersey Building Code: Which Editions Are Adopted
New Jersey building code: 2024 I-Codes adopted into the New Jersey Uniform Construction Code, effective 17 August 2026. Checked 2026-10-01 against the state source.
- New Mexico Building Code: Which Editions Are Adopted
New Mexico building code: 2021 New Mexico Commercial and Residential Building Codes, effective 14 July 2023. Checked 2026-10-01 against the state source.
- New York Building Code: Which Editions Are Adopted
New York: 2025 New York State Uniform Fire Prevention and Building Code and 2025 Energy Code, effective 31 December 2025. Checked 2026-10-01 against the state source.
- North Carolina Building Code: Which Editions Are Adopted
North Carolina building code: 2018 North Carolina State Building Code, effective 1 January 2019; the adopted 2024 code is on hold. Checked 2026-10-01 against the state source.
- North Dakota Building Code: Which Editions Are Adopted
North Dakota: 2024 North Dakota State Building Code, effective 1 January 2026, for cities and counties that choose to enforce a…. Checked 2026-10-01 against the state source.
- Ohio Building Code: Which Editions Are Adopted
Ohio building code: 2024 Ohio Building Code, effective 1 March 2024; homes follow the 2019 Residential Code of Ohio. Checked 2026-10-01 against the state source.
- Oklahoma Building Code: Which Editions Are Adopted
Oklahoma building code: 2024 I-Codes with Oklahoma amendments, effective statewide 14 September 2026. Checked 2026-10-01 against the state source.
- Oregon Building Code: Which Editions Are Adopted
Oregon: 2025 Oregon Structural Specialty Code and 2026 Oregon Residential Specialty Code, both based on the 2024 I-Codes. Checked 2026-10-01 against the state source.
- Pennsylvania Building Code: Which Editions Are Adopted
Pennsylvania building code: 2021 I-Codes under the Pennsylvania Uniform Construction Code, effective 1 January 2026. Checked 2026-10-01 against the state source.
- Rhode Island Building Code: Which Editions Are Adopted
Rhode Island: Rhode Island State Building Code on the 2021 I-Codes, with a 2024 IECC energy code, effective 1 December 2025. Checked 2026-10-01 against the state source.
- South Carolina Building Code: Which Editions Are Adopted
South Carolina building code: 2021 South Carolina codes, adopted 6 October 2021 and effective 1 January 2023. Checked 2026-10-01 against the state source.
- South Dakota Building Code: Which Editions Are Adopted
South Dakota: 2024 IBC set by state law as the design standard for non-residential buildings from 1 July 2026; homes follow the…. Checked 2026-10-01 against the state source.
- Tennessee Building Code: Which Editions Are Adopted
Tennessee: State Fire Marshal's minimum codes on the 2021 I-Codes since 17 April 2025, with homes still on the 2018 IRC and 2018…. Checked 2026-10-01 against the state source.
- Texas Building Code: Which Editions Are Adopted
Texas: No statewide building code; state law sets the 2012 IBC and IRC as the minimum inside cities, and the 2015 IECC and IRC e…. Checked 2026-10-01 against the state source.
- Utah Building Code: Which Editions Are Adopted
Utah building code: Utah State Construction Code on the 2024 IBC and 2024 IECC from 1 July 2026, with homes still on the 2021 IRC. Checked 2026-10-01 against the state source.
- Vermont Building Code: Which Editions Are Adopted
Vermont: 2025 Vermont Fire & Building Safety Code (2021 IBC) for public buildings, effective 4 November 2025; no state building…. Checked 2026-10-01 against the state source.
- Virginia Building Code: Which Editions Are Adopted
Virginia building code: 2021 Virginia Uniform Statewide Building Code (USBC), effective 18 January 2024. Checked 2026-10-01 against the state source.
- Washington Building Code: Which Editions Are Adopted
Washington: 2021 Washington State Building Code, effective 15 March 2024. Checked 2026-10-01 against the state source, with the cross-state ICC record for comparison.
- West Virginia Building Code: Which Editions Are Adopted
West Virginia: 2018 West Virginia State Building Code, effective 1 August 2022, in force only where a county or city adopts it. Checked 2026-10-01 against the state source.
- Wisconsin Building Code: Which Editions Are Adopted
Wisconsin: Wisconsin Commercial Building Code based on the 2021 I-Codes, effective 1 September 2025; homes follow the state-writ…. Checked 2026-10-01 against the state source.
- Wyoming Building Code: Which Editions Are Adopted
Wyoming: 2024 International Codes adopted by the Department of Fire Prevention and Electrical Safety in June 2024 for public and…. Checked 2026-10-01 against the state source.