Welcome to the WSEC Commercial Technical Support Website

This website provides helpful technical resources and supports the process of demonstrating compliance with the Washington State Energy Code (WSEC) Commercial Provisions. Features and resources available include an energy code documents portal, compliance documentation forms and online tools, searchable frequently asked questions feature and one-on-one technical support.

Compliance with the Energy Code is required throughout WA State for all new construction, additions and retrofit projects. When submitting your project for a building, electrical or mechanical permit, information required includes the Code provisions that apply to the project and the design measures taken to comply with these provisions. Select the Jurisdiction Information icon for specific information about each jurisdiction.


An energy code edition selector has been incorporated into the online compliance documentation webtool so users can select either the 2015 or 2018 WSEC edition for their commercial compliance documetation. This online resource captures all the same details as the Excel forms, plus it's chock full of helpful information and compliance verification tools not available in the Excel file format. Excel forms WILL NOT be developed for the commercial 2018 WSEC. The online compliance documentation website will be the only tool available. 

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Fact sheets, on-demand webinars and classroom trainings

WSEC Education

Jurisdiction contact information, WSEC compliance submittal requirements

Jurisdiction Information

Code documents, official interpretations and amendments

WSEC Documents