Licensed Asbestos Abatement Companies in Washington

Washington State certifies asbestos abatement contractors through the Department of Labor & Industries (L&I), which also certifies the supervisors and workers on every crew. Seattle’s early-1900s housing stock, popcorn ceilings across the state, and strict local notification rules keep licensed contractors in steady demand. All 166 firms listed here hold a current L&I asbestos contractor certification, verified against the state register.

All 166 firms verified against the official Washington L&I register as of July 2026.

• License mix: 166 abatement contractors and 0 testing & inspection firms.
• Customer ratings: 126 firms have Google reviews, averaging 4.5 out of 5.

• Verify the license. Every firm on this page is verified against the Washington L&I register, and each listing shows the license number so you can check it yourself.
• Match the license to the job. Use an abatement contractor for removal or repair, and an independent testing & inspection firm for surveys, sampling, and clearance air testing.
• Get at least three written quotes. A proper quote details the scope of work, containment method, waste disposal, and final clearance testing.
• Ask about insurance. Licensed firms should carry general liability and, for abatement, pollution liability coverage. Request certificates before work starts.