View Adopted Changes
The Washington State Ventilation and Indoor Air Quality Code has been repealed, as has the Washington State Historic Building Code. Provisions formerly found in the VIAQ are now located in the IRC, the IMC and the IBC as appropriate. The Historic Building Code has been replaced by the International Existing Buildings Code, as adopted and amended by WAC 51-50-480000. See the IBC for state amendments.
Final Cost Benefit Analyses: (Washington State Energy Code)
Residential Analysis Non-Residential Analysis