*The Angi rating for Radon Detection And Reduction companies in Cornwall, PA 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 Cornwall, PA 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 April 13, 2026
Serving Cornwall, PA and surrounding areas
Approved
In business since 2017
Free estimates
Customers say: Quick response
"Radon was over 6, now it's under 1. Job was done quickly."
Serving Cornwall, PA and surrounding areas
Approved
In business since 2016
Free estimates
Credit card accepted
"He was a professional and willing to help. Would definitely would recommend to anyone."
Serving Cornwall, PA and surrounding areas
In business since 2008
Free estimates
Emergency services offered
"adon After I contacted him, he responded promptly. While evaluating the area that needed radon mitigation, he called to discuss an area that had not been evaluated by inspectors (not affiliated with him). After accepting his price, we agreed on the day for the installation. During the installation, he was respectful and communicative. After completing the installation, he provided written warranties for me and the buyer. I highly recommend Keystone Radon Mitigators.
"
Serving Cornwall, PA and surrounding areas
In business since 2017
Free estimates
Credit card accepted
"Terry does a thorough inspection and has a great write up with extensive photos and details. He is very responsive to all requests. I highly recommend him!"
Serving Cornwall, PA and surrounding areas
In business since 2020
Free estimates
Emergency services offered
"Very helpful with explaining issues that needed to be corrected during the inspection."
Serving Cornwall, PA and surrounding areas
In business since 2017
Free estimates
Credit card accepted
"Tom was wonderful and extremely thorough! He explained everything as he went along and I left feeling like I really knew the ins and outs of the property. He was extremely personable and very professional. He called to schedule and follow up prior to the date of the inspection. I felt confident in him during the entire process. I would recommend him to anyone."
Serving Cornwall, PA and surrounding areas
In business since 2021
Free estimates
Small jobs welcome
"On time, very friendly and knowledgeable about the older home he was checking for me. I would recommend Steve."
+7
Serving Cornwall, PA and surrounding areas
In business since 1954
Emergency services offered
Credit card accepted
"Great! I'd use them again"
From average costs to expert advice, get all the answers you need to get your job done.
Get clear answers on how much radon remediation costs, including average prices, key cost factors, and tips to save money on your home’s radon mitigation.
Find out what impacts radon testing costs, including average prices for DIY kits and professional services, so you can protect your home and budget confidently.
The cost of a radon mitigation system depends mostly on the type of system being installed. Use this guide to learn about your options.
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.
Can a homeowner install a radon mitigation system? While some parts of the project are fine for DIY, you should leave the meat of the task to a licensed professional.
Thinking about refinishing your basement? A bit of planning can go a long way. Here's everything you need to know to get started.
