MAINTENANCE UPDATE NOTICE - Access to this website will be temporarily limited while updates are made to support new features. The maintenance period will be from 12:00pm PDT on Friday, March 13th until 10:00am PDT on Monday, March 16th, 2026.

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. The online compliance documentation webtool includes a code edition selector so users can select the applicable WSEC edition for their commercial project. This online resource is chock full of helpful information and compliance verification tools.

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.

THIS WEBTOOL SUPPORTS VARIOUS REQUIREMENTS IN THE 2018 WSEC-C AND 2021 WSEC-C FOR ENVELOPE, LIGHTING & MECHANICAL.

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