Wash. Rev. Code § 60.28.030
Any person, firm, or corporation filing a claim against the reserve fund shall have four months from the time of the filing thereof in which to bring an action to foreclose the lien. The lien shall be enforced by action in the superior court of the county where filed, and shall be governed by the laws regulating the proceedings in civil actions touching the mode and manner of trial and the proceedings and laws to secure property so as to hold it for the satisfaction of any lien against it: PROVIDED, That the public body shall not be required to make any detailed answer to any complaint or other pleading but need only certify to the court the name of the contractor; the work contracted to be done; the date of the contract; the date of completion and final acceptance of the work; the amount retained; the amount of taxes certified due or to become due to the state; and all claims filed with it showing respectively the dates of filing, the names of claimants, and amounts claimed. Such certification shall operate to arrest payment of so much of the funds retained as is required to discharge the taxes certified due or to become due and the claims filed in accordance with this chapter. In any action brought to enforce the lien, the claimant, if he or she prevails, is entitled to recover, in addition to all other costs, attorney fees in such sum as the court finds reasonable. If a claimant fails to bring action to foreclose his or her lien within the four months period, the reserve fund shall be discharged from the lien of his or her claim and the funds shall be paid to the contractor. The four months limitation shall not, however, be construed as a limitation upon the right to sue the contractor or his or her surety where no right of foreclosure is sought against the fund.
RCW 60.28.030