The 2012 editions of the Seattle Building, Residential, Existing Building, Mechanical, Fuel Gas, Energy and Plumbing codes are finding their way through the city legislative process. We will post drafts of the legislation on our Changes to Code web page in early June.
While we still don’t have a firm date when the codes will take effect, we will
specify that they will become mandatory no earlier than October 13, 2013. There will be a 60-day transition period that begins 30 days after the Mayor signs the legislation. During the transition period, you will have the choice of using the 2009 or 2012 codes. If you would like more information, contact Maureen Traxler at firstname.lastname@example.org.