A vote by the Washington State Building Code Council to delay the implementation day of the 2018 model codes to July 1, 2021 has been repealed by the Governor. All permit applications received on or after February 1, 2021 will be reviewed under the 2018 Codes.
These codes outline the minimum construction requirements for the state of Washington. See Washington State Building Code Council (WA SBCC) Web Page for more information on the new requirements:
SBCC Announcement: https://sbcc.wa.gov/news/2018-code-effective-date-extension-repealed-effective-date-february-1-2021
Amendments to the Code:https://sbcc.wa.gov/state-codes-regulations-guidelines/state-building-code/building-code-amendments