*The Angi rating for Radon Detection And Reduction companies in Langley, WA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.
*The HomeAdvisor rating for Radon Detection And Reduction companies in Langley, WA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.
Last update on July 16, 2026
Serving Langley, WA and surrounding areas
Approved
In business since 2019
Free estimates
Small jobs welcome
"I am very pleased with service from 5 Microns. They were quick to communicate, showed up on time, very professional and promptly shared the test results."
+32
Serving Langley, WA and surrounding areas
Approved
Free estimates
Emergency services offered
Offers commercial services
Element provides a wide range of professional services in the areas of Environmental Consulting, Water Resource Evaluation, UXO Support, and Engineering Design. Element provides the personal attention and flexible decision making capabilities of a small business while providing the breadth of expertise and experience of a large firm.
Serving Langley, WA and surrounding areas
In business since 1997
Free estimates
"They were very honest & told us we didn't have black mold and needed a dehumidifier. I would very certainly recommend them for their honesty"
Serving Langley, WA and surrounding areas
In business since 2020
Free estimates
Offers commercial services
"Palm Construction recently replaced roof on my house and it was a great experience to work with Lee and his well organized team from Palm Construction. They did excellent job and my roof passed inspection with no issues. The quality of work and materials is excellent and my new roof looks fantastic. Also my whole house looks mush better now. Thanks!"
Serving Langley, WA and surrounding areas
In business since 1988
Free estimates
Credit card accepted
SWAT Environmental is the nation's largest radon abatement engineer. Our experienced staff has corrected radon problems for over 60,000 customers since 1988 with 100% success!
Serving Langley, WA and surrounding areas
In business since 2025
Free estimates
Credit card accepted
"Esmeralda was really professional answered all the questions I had , removed popcorn ceiling from my bedrooms , would highly recommend All Pacific Northwest ?"
+3
From average costs to expert advice, get all the answers you need to get your job done.
Find out the average radon testing cost in Seattle, WA. Learn what you can expect to pay for local professional testing to keep your home's air safe.
The cost of a radon mitigation system in Seattle, WA, depends mostly on the type of system being installed. Use this guide to learn about your options.
The cost of a radon mitigation system depends mostly on the type of system being installed. Use this guide to learn about your options.
Radon is a gas that you can't see or smell and is harmful to your health. If your home has radon, you need to know who installs radon mitigation systems.
What is radon gas? Find out what this radioactive gas is, why it is dangerous, how it gets in your home, and how to mitigate it.
What is radon testing? Radon testing measures the presence and concentration of radon gas within indoor environments. Read on to learn more.
