• Washington Administrative Code (WAC) - Title 51

  Refer to 51-11C for the WSEC for Commercial. This information includes all proposed and permanent rules associated with each section under "Agency filings affecting this section." Currently, 2018 WSEC-C section language is listed first followed by 2021 WSEC-C language.

• Washington State Energy Code (WSEC)

  This code has three parts and all are required for a complete copy of the WSEC - commercial provisions, residential provisions and appendix chapters. Editions currently posted on the SBCC website include the 2021 WSEC, 2018 WSEC and historical editions from 2006 through 2015. WSEC documents are free to download.

Amendment and interpretation information for the current edition of the WSEC is consolidated here for easy reference. Check this webpage regularly for the latest news about WSEC updates.

SBCC = Washington State Building Code Council