4.8 
55 *The Angi rating for Radon Detection And Reduction companies in Castle Rock, CO 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 Castle Rock, CO 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 14, 2025
Serving Castle Rock, CO and surrounding areas
Approved
In business since 2018
Free estimates
Customers say: True professional
"Highly recommend! Came out gave me all the info I needed about Radon. Replaced my radon fan and retested ! Did a great job!"
Serving Castle Rock, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2020
Free estimates
Credit card accepted
"Jason was very helpful explaining the testing process, and possible mitigation if our Radon levels were high. Radon testing was setup and conduced quickly and our levels were in acceptable ranges, so no mitigation was required."
Serving Castle Rock, CO and surrounding areas
Approved
In business since 2014
Free estimates
Warranties offered
"Steve did a great job and provided several options for our Radon mitigation. He did a great job and the Radon levels quickly dropped to well below minimum standard."
+5
Serving Castle Rock, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2011
Free estimates
Emergency services offered
"Recently I had radon mitigation system installed in my house. The job was done by Affordable Radon Services LLC. Very friendly workers Ken and Joe worked on my property. They did excellent job. The following test showed significant decrease at the radon level on the property. I am very happy that I hired this company and recommend for your needs."
+25
Serving Castle Rock, CO and surrounding areas
Approved
In business since 2015
Free estimates
Warranties offered
"I think it’s supposed to say global industries? Alex was a big help getting our radon installed he seems like he knows what he’s doing! He did say he would send an invoice though but hasn’t yet. Other than that all good. We are waiting for the test kit in the mail to ensure the system is working as expected!"
+2
Serving Castle Rock, CO and surrounding areas
Approved
In business since 2012
Free estimates
Warranties offered
"All Colorado Radon tackled a particularly difficult radon mitigation that other companies refused to mitigate. They were very thorough and knowledgeable. Most of all, they were successful in reducing radon levels to well below government standards. We would use them again."
+1
Serving Castle Rock, CO and surrounding areas
Approved
In business since 2016
Free estimates
Credit card accepted
"I couldn't be more pleased with the radon mitigation service John provided. The estimate was accurate-no surprises. He was prompt, efficient and quick- it took just over 2 hours and that's including answering all my questions (and I had a lot of questions!). John's customer service was excellent and the results have so far exceeded my expectations. I am very glad I chose RMR."
+34
Serving Castle Rock, CO and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"Did a great job. Did radon reduction for my mother."
+10
Serving Castle Rock, CO and surrounding areas
Approved
In business since 2014
Free estimates
Warranties offered
"Painless and efficient installation of radon mitigation system. A real pro and highly recommended!"
+3
Serving Castle Rock, CO and surrounding areas
Approved
In business since 2019
Credit card accepted
Customers say: True professional
"Great job, they delivered the report in time and was easy to read."
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 Denver, CO. Learn what you can expect to pay for local testing services and keep your home safe from dangerous gas.
The cost of a radon mitigation system in Denver, CO, depends mostly on the type of system being installed. Use this guide to learn about your options.
Find out the average indoor air quality testing cost in Denver, CO. Learn what you can expect to pay for local testing services to keep your home safe.
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.
