The Seattle Existing Building Code provides minimum requirements for repair, alteration, change of occupancy, addition, and relocation of existing buildings. Seattle has adopted the 2009 International Existing Building Code, with amendments specific to our city.
This code does not cover regulations for single-family houses, duplexes, and townhouses with up to three stories and separate entrances. Those regulations are found in the 2009 Seattle Residential Code.
A proposed new edition of the code will take effect in fall 2013. To dig deeper, go to our 2012 Building Code Update page.