Statewide Adoption of the International Building Code (IBC), International Residential Code (IRC), and International Existing Building Code (IEBC)
| IBC | IRC | IEBC | |
| Alaska | S 2012 | L 2012 | |
| Arizona | L 2012 | L 2009 | L |
| California | S 2015 | s 2015 | S 2015 |
| Colorado | L 2012-2015 | L 2015 | L 2015 |
| Hawaii | S 2006 | S 2006 | |
| Idaho | S 2015 | S 2012 | S 2015 |
| Montana | S 2012 | S 2012 | S 2012 |
| Nevada | L 2012 | L 2012 | L 2012 |
| New Mexico | S 2015 | S 2015 | S 2015 |
| Oregon | S 2012 | S 2015 | |
| Utah | S 2015 | S 2015 | S 2015 |
| Washington | S 2018 | S 2018 | S 2018 |
| Wyoming | S 2015 | L 2015 | S 2015, L |
| Guam | S 2009 | S 2009 | S 2009 |
| Northern Mariana Islands | S 2009 |
S Effective Statewide
L Adopted by Local Governments
Year Indicates International Code Edition
Information from the International Code Council website January 2019