Washington State Residential Energy Code Technical Code Support

Our energy code team provides support to those who use the residential sections of the Washington State Energy Code (WSEC-R).

To determine which version of the WSEC-R a building permit must follow, refer to the date when the permit was issued. If the building permit was issued after:

  • March 15th, 2024, it must meet requirements of 2021 WSEC-R
  • February 1st, 2021, it must meet requirements of 2018 WSEC-R
  • July 1st, 2016, it must meet requirements of 2015 WSEC-R

Click on one of the provided links to get started:


For additional assistance from the Technical Code Support Hotline:

Call: 360.956.2042


Submit an energy code question here. We generally respond to requests within three business days. This form will automatically submit your question to us via email and we will generate a response to the provided contact information. This form will have the same response time as submitting your request to the prior method. Please do not submit to both. Thank you for your support in our efforts to bring updates to our website and services. The new website features are being added to help us improve our service to you.

Washington State Energy Code - Commercial (WSEC-C)

Evergreen Technology Consulting provides technical code support for the Washington State commercial energy code support.

Contact: Evergreen Technology Consulting

Phone: 360-539-5300

Website: Washington State Energy Code

Email: com.techsupport@WAenergycodes.com.

State Building Code Council (SBCC)

The State Building Code Council (SBCC) was created to provide independent analysis and objective advice to the legislature and the Governor’s Office on state building code issues. The SBCC establishes the minimum building (mechanical, fire, plumbing, and energy code) requirements necessary to promote health, safety, and welfare to the people of the state of Washington by reviewing, developing, and adopting the state building code.

Click here to be redirected to the SBCC website. The most current and up to date WSEC versions, and all other Washington specific codes, are located and updated by the SBCC.

Photo courtesy of: SBCC (wa.gov)


Any mention of trade names, commercialized products, and organizations in our educations and/or materials, or utilized in our code support documentation and tools, does not imply endorsement by Washington State University’s Energy Program (WSUEP). The WSUEP and its collaborators make no warranties, whether expressed or implied, nor assume any legal liability or responsibility for the accuracy, completeness or usefulness of the contents of this publication, or any portion thereof, nor represent that its use would not infringe on privately owned rights.

Further, the WSUEP cannot be held liable for construction defects or deficiencies resulting from the proper or improper application of the content of this education. Our WSEC-Residential technical support team is not an affiliate of, nor do we speak for, the Washington State Building Code Council (SBCC). Official opinions of WSEC intent are made only by the SBCC in response to official inquiries submitted to the SBCC by authorities having jurisdiction. While we try to stay aligned with the SBCC, the technical support we provide is advisory only and non-binding on authorities having jurisdiction, builders, designers, and the building trades personnel involved with construction and remodeling of residential structures.