Local Residential Amendments
RCW 19.27 gives local governments the authority to amend the state building code as it applies within their jurisdiction. However, amendments may not diminish the state code. Local governments are also prohibited from amending accessibility requirements or residential energy code provisions.In addition, any amendment affecting single family or multifamily residential construction is required to be reviewed and approved by the State Building Code Council prior to becoming effective. "Multifamily residential" is defined as common wall residential buildings that consist of four or fewer units, that do not exceed two stories in height, that are less than 5,000 square feet in area, and have a one-hour fire-resistive occupancy separation between units.
All local government residential amendments to the building code that require council approval must be submitted in writing to the council, after the city or county legislative body has adopted the amendment and prior to implementation and enforcement of the amendment by the local jurisdiction. Each submittal is also required to be shall be based on the following criteria and accompanied by findings of fact adopted by the governing body of the l