RCW 70.92.160

The administrative authority of any jurisdiction may grant a waiver from compliance with any standard adopted hereunder for a particular building or structure if it determines that compliance with the particular standard is impractical: PROVIDED, That such a determination shall be made no later than at the time of issuance of the building permit for the construction, remodeling, or rehabilitation: PROVIDED FURTHER, That the board of appeals provided for in chapter 1 of the Uniform Building Code shall have jurisdiction to hear and decide appeals from any decision by the administrative authority regarding a waiver or failure to grant a waiver from compliance with the standards adopted pursuant to RCW 70.92.100 through 70.92.160. The provisions of the Uniform Building Code regarding the appeals process shall govern the appeals herein.