2021 Seattle Code Adoption - What & Why

SDCI Proposed Changes

What’s Happening Now?

SDCI is preparing for the 2021 Seattle Code adoption cycle. We are now accepting proposed changes to the 2021 Seattle building, residential, existing building, mechanical, plumbing, fuel gas, and fire codes. We are also accepting proposed errata to correct printing errors in the 2018 Seattle construction codes.  

Send proposed changes to:

Jenifer Gilliland, Senior Technical Code Development Analyst
(206) 233-2766

Micah Chappell, Technical Codes Development Manager
(206) 256-5157

Current Seattle Codes Are Available

The 2018 Seattle construction codes are now available for purchase through the International Code Council as a bookmarked pdf copy that you can download. 

You can order printed copies of the Seattle construction codes and errata through SDCI. View our publication list for prices. To order, please submit a request through the Seattle Services Portal using the Permits - Trade, Construction and Land Use option. See How to Purchase Seattle Code Books From SDCI for instructions on how to submit your request.

Read only versions of the Seattle construction codes and errata are available on the code webpages.

Project Benefits

Regular updates to Seattle's construction codes make it easier to:

  • Incorporate emerging technology and materials into construction to increase a building's safety, usability, and lifespan
  • Keep Seattle competitive and innovative with early adoption of national code changes
  • Adopt requirements that ensure Seattle's leading-edge energy and carbon reduction goals are met
  • Decrease differences in construction code adoption and enforcement with neighboring communities    

The End Result

SDCI is preparing for the adoption of the 2021 editions of the national model codes published with State of Washington and local Seattle amendments. The target effective date for these new codes is July 1, 2023.