Washington Revised Code Title 36. Counties § 36.145.150. Individual assessments on district property--Liens

All assessments imposed on the respective lots, tracts, parcels of land, and other property included within the boundaries of an approved district in accordance with this chapter are a lien upon the property from the date of final approval and are paramount and superior to any other lien or encumbrance whatsoever, theretofore or thereafter created, except a lien for general taxes.