Wash. Rev. Code § 42.36.010
Application of the appearance of fairness doctrine to local land use decisions shall be limited to the quasi-judicial actions of local decision-making bodies as defined in this section. Quasi-judicial actions of local decision-making bodies are those actions of the legislative body, planning commission, hearing examiner, zoning adjuster, board of adjustment, or boards which determine the legal rights, duties, or privileges of specific parties in a hearing or other contested case proceeding. Quasi-judicial actions do not include the legislative actions adopting, amending, or revising comprehensive, community, or neighborhood plans or other land use planning documents or the adoption of area-wide zoning ordinances or the adoption of a zoning amendment that is of area-wide significance.
RCW 42.36.010