I am less optimistic than Mr. Sullivan that an interior designer can file a construction lien in Washington. In my opinion it may depend on the qualifications of the person asserting the lien. Any such lien would fall under a lien for professional services as defined in RCW 60.04.011(13). Under that definition, arguably, a person asserting a lien for professional services has to be providing surveying, architectural or engineering services. In Washington, all three are licensed professions....
In Washington, two different names for the same thing. The statute is entitled "Mechanic's and Materialmen's Liens" (RCW 60.04), but they are commonly known as, and referred in the statute as, "construction liens."