SDCI is in the process of updating Seattle’s construction codes to the 2018 versions of the building, residential, existing buildings, mechanical, energy, fuel gas, and plumbing codes. We have been aiming for an effective date of July 1, 2020, to align with the effective date of the Washington State building codes. However, due to many factors, including the impacts of the COVID-19, the effective date of Seattle’s codes will be delayed until November 1, 2020. If the 2018 Washington State construction codes effective date is delayed past November 1, we will align the effective date of our codes with the State.
Please visit our 2018 Seattle Code Adoption website for continued information and to review proposed code change documents.
If you have questions, please contact:
Technical Code Development Manager