*The Angi rating for Radon Detection And Reduction companies in Seattle, 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 Seattle, 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 May 21, 2026
Serving Seattle, WA and surrounding areas
Approved
In business since 2019
Free estimates
Small jobs welcome
"Pascale was super detailed and only tests and checks for mold but does not do remediation so there is no conflict of interest in trying to sell additional services. I would highly recommend if you are looking for honest assessment of issues"
+32
Serving Seattle, WA and surrounding areas
Approved
In business since 2005
Emergency services offered
Credit card accepted
"Highly recommend hiring! Virgil was responsive, friendly, timely, very reasonable, and he sure knows his stuff! And how can you go wrong with a company name like Home PI! Would absolutely recommend working with Virgil to do testing."
Serving Seattle, WA and surrounding areas
Approved
In business since 2022
Free estimates
Offers commercial services
"I have 3 pets and their hair is literally everywhere... Dan and Brandon cleaned out our vents and helped us breathe easier! I will definitely call these guys again due to their outstanding manners and professionalism. Not to mention a job well done!"
Serving Seattle, 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 Seattle, WA and surrounding areas
In business since 2019
Free estimates
Emergency services offered
"Great, Colby did a great job and helped me understand the whole pricess as well as the insurance side so i was fully i formed the entire time"
+23
Serving Seattle, WA and surrounding areas
In business since 2025
Free estimates
Al-KI Home Inspection is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business. Please give us a call today!
Serving Seattle, WA and surrounding areas
In business since 2003
Free estimates
Credit card accepted
Werner Consultant America, LLC will if possible evaluate and fix any environmental/hygienic problem including for example mold and toxicity problems in your home.
Serving Seattle, WA and surrounding areas
In business since 2020
Free estimates
Offers commercial services
"My good friend recommended me Palm Construction on my roof replacement. I also contacted some other recommended roofing contractors and offer from Palm Construction was very acceptable. Lee and his crew started roof replacement soon after we signed a contract. Lee was very professional, honest and helpful. His crew kept working area clean as possible and they finished my roof quick and on time. The roof passed inspection and it looks great. I would highly recommend Palm Construction!"
Serving Seattle, WA and surrounding areas
Serving Seattle, 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!
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.
