Becoming a home inspector in Washington means working with one of the most experience-heavy licensing systems in the Pacific Northwest. The Washington State Department of Licensing (DOL), through its Home Inspectors Advisory Licensing Board, has required licensure since 2009. The path includes 120 hours of Board-approved coursework, 40 hours of mentored field training under a licensed inspector, 5 actual supervised inspections, and the National Home Inspector Examination (NHIE).