RCW 58.17.070: Preliminary plat of subdivisions and dedications—Submission for approval—Procedure.

A preliminary plat of proposed subdivisions and dedications of land shall be submitted for approval to the legislative body of the city, town, or county within which the plat is situated.

Unless an applicant for preliminary plat approval requests otherwise, a preliminary plat shall be processed simultaneously with applications for rezones, variances, planned unit developments, site plan approvals, and similar quasi-judicial or administrative actions to the extent that procedural requirements applicable to these actions permit simultaneous processing.