In order to become licensed as a home inspector in the state of Washington, an applicant must submit the following to the department: (1) An application on a form developed by the department; (2) Proof of a minimum of one hundred twenty hours of classroom instruction approved by the board; (3) Proof of up to forty hours of field training supervised by a licensed home inspector; (4) Evidence of successful passage of the written exam as required in RCW 18.280.08: Applicants for licensure must pass an exam that is psychometrically valid, reliable, and legally defensible by the state. The exam is to be developed, maintained, and administered by the department. The board shall recommend to the director whether to use an exam that is prepared by a national entity. If an exam prepared by a national entity is used, a section specific to Washington shall be developed by the director and included as part of the entire exam. The National Home Inspector Examination is accepted by Washington State to satisfy the exam requirement.

Please visit the Washington State Legistature website for more information.