Get matched with top radon detection and reduction specialists in Larkspur, CO

"We hired Custom Radon Mitigation to handle our Radon problem. They were awesome, we had zero problems. Great work!"

"Veteran Radon installed a radon mitigation system In our home on 2/19/26. They did a great job, and we recommend them highly! Jason came to our home to look at the situation so he could prepare an estimate. He was friendly, courteous, and happy to answer our questions. Our system was installed by Ken, who was thoughtful, conscientious and efficient. He gladly worked with us to locate the outlet of the system where it would have the least impact on our outdoor space. The work took only about half a day, minimizing disruption to our lives. His workmanship was excellent. The completed system looks very neat and well constructed. Everything fits beautifully. Prior to the installation, we had tests showing radon levels of 20.4 pCi/L and 25.9 pCi/L. Post-installation testing showed that our radon level was reduced to 0.7 pCi/L, well below the 4.0 pCi/L that the State considers acceptable."

"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."

"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."

"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."

"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."

"John and his company were very professional. We had a couple snafus with the sale/buying of our houses. John was very accommodating. We got our radon done and very pleased :)"

"Within 24 hours of install my home went from the high 6's in radon levels down to the high 2's and mid 3's. Professional and very efficient personnel at reasonable prices."

"Josh was great to work with! (Radon testing) I would highly recommend ⭠︠⭠︠⭠︠⭠︠⭠ï¸Â"

Master Mitigators works with homeowners, buyers, sellers, real estate agents, builders, and business owners across Denver and the Front Range, where radon exposure remains a recognized concern. Colorado's soil and foundation construction create conditions that require informed assessment and tailored response. Addressing radon isn't only about installation—it's about understanding what's beneath your property and how to respond effectively.\n\nYou'll receive an evaluation that accounts for your foundation type, soil composition, and property layout. From there, the focus shifts to planning a system that fits your space without disrupting daily routines or compromising structural integrity. Every property presents different variables, and your solution should reflect that.\n\nReach out to Master Mitigators to schedule a radon assessment for your home or business.