Washington Building Code, Permit and Licensing Information
Washington Construction Code Agency:
Washington Building Code Council
1500 Jefferson St SE, Olympia, WA 98501
Department of Labor and Industries, Electrical Division
P.O. Box 44000
Olympia, WA 98504
Notes: The Department of Labor and Industries is in the process of updating the Washington Administrative Code (WAC) 296-46B, Electrical Safety Standards, Administration, and Installation rules to the NEC-2020, to be effective November 1, 2020.
Washington Construction Codes and Edition Adopted:
- The IBC, IRC, IFC, IMC, and IFGC codes are named by Washington statute and required to be adopted.
- 2018 International Building Code
- 2018 Washington State Energy Code based on the 2018 International Energy Conservation Code
- 2020 National Electric Code (NEC)
- 2018 International Fire Code
- 2018 International Fuel Gas Code
- 2018 International Mechanical Code
- 2018 International Residential Code
- 2018 International Wildland-Urban Interface Code
- 2018 International Existing Building Code
- 2018 International Swimming Pool and Spa Code
Applicability (statewide, local, limited): STATEWIDE
Building codes are adopted in Washington by statute. The Washington State Building Code Council has authority to adopt amendments to these codes for statewide application.
|State Licensing||Contractor licensing is required by the State of Washington. A license is required for plumbing, and electrical trades. Businesses must register with the Secretary of State.|
|State Building Code||2018 International Building Code – This code also includes amendments for the 2018 International Existing Building Code. Adopted July 26, 2019; Effective July 1, 2020
2018 International Building Code (Pt. 2) – Correlation issues on stair pressurization and smoke control. Adopted November 8, 2019; Effective July 1, 2020
2018 International Fire Code – Adoption and amendment of the 2018 International Fire Code.
2018 International Fire Code (Pt. 2) – Correlation of existing state amendments and 2018 IFC language. Adopted November 8, 2019; Effective July 1, 2020
2018 Washington State Energy Code – Residential – Link to pdf language.
2018 International Residential Code – Proposed changes to the 2018 IRC, including adoption of a modified Appendix Q for tiny houses. Link to be posted shortly.
2018 International Mechanical Code – Proposed changes to the 2018 IMC, including revised requirements for whole-house ventilation. (Link is currently to the proposed code amendments. Final adopted version to be posted shortly.) Adopted November 8, 2019; Effective July 1, 2020
2018 Uniform Plumbing Code – Proposed changes to the 2018 UPC, including new requirements for water conserving fixtures. (Link is currently to the proposed code amendments. Final adopted version to be posted shortly.) Adopted November 8, 2019; Effective July 1, 2020
|State Licensing Division||https://www.dol.wa.gov/|
|State Fire Marshall||https://www.wsp.wa.gov/fire/firemars.htm|
|State Environmental Permit||https://www.ecy.wa.gov/|
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Washington State Building Code CouncilState Building Code Council 210 11th Avenue SW Olympia, WA 98504