State Building Code

The Washington State Building Code is comprised of several different codes. Most are national model codes adopted by reference and amended at the state level. Others, such as the Washington State Energy Code, are state-written state-specific codes.

Only the state amendments and state-written codes are available on this website for viewing and download. For information on purchasing the base model codes or hard copies of the state amendments, see the Ordering Information page. The International model codes may be viewed through the following site:
The Uniform Plumbing Code can be viewed here:

Printing Instructions: The following amendments are formatted as insert pages to the first edition of the codes. They are meant to be printed as two-sided documents and contain the appropriate blank pages to print across from the amended page.

The amendments may also be viewed in html format (as a single, unformatted document) on the legislative website here: 

Please Note: The download links on this website work best with Explorer as your browser. PDF files may not open properly when using Chrome or Firefox. If you experience trouble opening a file, right click on the link and save the file; you can then go in and manually change the file extension back to .pdf and the file will open.