Washington Revised Code Title 36. Counties § 36.70A.115. Comprehensive plans and development regulations must provide sufficient land capacity for development

(1) Counties and cities that are required or choose to plan under RCW 36.70A.040 shall ensure that, taken collectively, adoption of and amendments to their comprehensive plans and/or development regulations provide sufficient capacity of land suitable for development within their jurisdictions to accommodate their allocated housing and employment growth, including the accommodation of, as appropriate, the medical, governmental, educational, institutional, commercial, and industrial facilities related to such growth, as adopted in the applicable countywide planning policies and consistent with the twenty-year population forecast from the office of financial management.

(2) This analysis shall include the reasonable measures findings developed under RCW 36.70A.215, if applicable to such counties and cities.