This page contains information that helps explain what you need to do to file a lien. Understand Washington mechanics lien laws, deadlines, and notice requirements on private construction projects, including free forms.Washington State Lien Law Summary- Who may have a lien in Washington State? What is a lien law against? You must file a lien 90 days after you last worked or supplied materials to the project. Find out all about the various types of liens in Washington state. Contact Northwest Lien with questions, or to file a lien today! Get free, easy to use construction payment forms for your Washington project. Contractor, Notice of Right to Claim Lien must be delivered within 60 days from first delivering labor or materials. A Washington mechanics lien must be filed.