*The Angi rating for Radon Detection And Reduction companies in Castro Valley, CA 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 Castro Valley, CA 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 31, 2026
Serving Castro Valley, CA and surrounding areas
Approved
In business since 1986
Free estimates
Customers say: Quick response
"Peter and his team at MG Remediation are professionals. They did everything they told me they would do and the radon levels dropped significantly. Great communication, too, which always matters."
+4
Serving Castro Valley, CA and surrounding areas
In business since 2000
Free estimates
Emergency services offered
"We were pleased and it went very well."
Serving Castro Valley, CA and surrounding areas
In business since 1997
Free estimates
Emergency services offered
"The experience with Justin at Fire & Water Damage Recovery was excellent. They were referred by the plumbing company that serviced my sump pump. We still got 3 estimate, Justin's estimate was in the middle but I felt good with Justin based on our phone conversation and the referral so we went with this company. Justin did tell me that he might have estimated on the high side because he does not like to surprise the homeowners. What a surprise when I go the final invoice. The final invoice came in much lower and was very close or lower than the lowest estimate I got. Justin and his team also took pictures of how the place was before and after for me to see. They even took pictures of the pathway that they took to get to the crawl space to assure me that they kept the place clean when they got in and out. I was very satisified with Justin and his company."
+27
Serving Castro Valley, CA and surrounding areas
In business since 1991
Free estimates
Emergency services offered
"Everything was fine. I had no complaints. I was just basically getting quotes from a few companies. They did the job they were supposed to do while giving me a quote. "
Serving Castro Valley, CA and surrounding areas
In business since 2005
Free estimates
Credit card accepted
"Hector did respond to me and did fix the problem with the panels. Overall it was a good job."
+48
From average costs to expert advice, get all the answers you need to get your job done.
The cost of a radon mitigation system in San Francisco, CA, 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.
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