2021 Seattle Code Adoption - Project Documents

SDCI Proposed Code Changes

The 2021 Washington state codes will be mandatory on March 15, 2024. The effective date for the 2021 Seattle codes is no sooner than July 1, 2024. Applicants may use the 2021 Washington codes with the draft Seattle amendments before March 15, 2024, when accompanied by a code modification request. Between March 15, 2024, and the Seattle code effective date, applicants may use either the 2018 or 2021 Seattle codes without a code modification request. Please visit the 2021 Seattle Code Adoption webpage for updates.

Project Documents

Understanding markings within the proposed code change documents:

A new change has underlined text or struck out text accompanied by a vertical change bar to the left or right of the text. 


[S] 703.2.3 Approved alternate method. The fire resistance of building elements, components or assemblies not complying with Section 703.2.1 or 703.2.2 shall be permitted to be established by an alternative protection method in accordance with Section ((104.11)) 104.5.

  • A bracketed [S] at the beginning of a section means the change comes from SDCI.
  • A bracketed [W] indicates a change adopted by the State of Washington.
  • Underlined or struck out text not accompanied by a vertical change bar is not new and was a change adopted in a previous code cycle.   
  • Text accompanied by a vertical change bar but no [S] or [W] at the beginning of the section and no underlined or struck out text indicates that new changes were made in the base code text by the International Code Council.

Construction and Inspections

Nathan Torgelson, Director
Address: 700 5th Ave, Suite 2000, Seattle, WA, 98104
Mailing Address: P.O. Box 34019, Seattle, WA, 98124-4019
Phone: (206) 684-8600
Phone Alt: Violation Complaint Line: (206) 615-0808
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SDCI issues land use, construction, and trade permits, conducts construction and housing-related inspections, ensures compliance with our codes, and regulates rental rules. SDCI is committed to an antiracist workplace and to addressing racism through our work in the community.