
Home Improvement Contractor Licensing Resources by State
Home Services Buying Guide

In Washington State, all home service contractors must register with L&I, be bonded ($30K general, $15K specialty), and insured. Specialty trades like electrical/plumbing have additional licenses. Sales tax in WA generally applies to both materials and labor for most home projects. Verify contractor registration, bond, and insurance via L&I's online tool and check business registration with the WA Secretary of State.