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Top-Rated Radon detection and reduction specialists in San Jose - Updated Nov 2026

Avatar for MG Remediation, Inc.
MG Remediation, Inc.
3.3(
8
)
Radon Gas - Abatement

Serving San Jose, 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."
Vapor Intrusion for VOC and Radon
 Cleaning
 Cleaning
Testing
Testing & Abatement

+4

Response time4 days
Recommended by80%of homeowners
Avatar for Fire & Water Damage Recovery
Fire & Water Damage Recovery
4.7(
69
)
Radon Gas - Testing

Serving San Jose, 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."
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+27

Recommended by88%of homeowners
Bay Works Tile & Stone
3.4(
31
)
Radon Gas - AbatementRadon Gas - Testing

Serving San Jose, CA and surrounding areas

In business since 2005

Free estimates

Credit card accepted

"It is never easy having your kitchen torn up, but Hector from Bay Works Tile and Stone was wonderful to work with.  He met with me a couple of times from January to March regarding this project and went over all the details.  It took a few months for me to decide what type of material I wanted to choose and I finally decided on a travertine.  I ordered the material and we set a date based on when the product would arrive.  I asked Hector to pick the product up for me and he had no problem doing that, and did not charge me more.  The first day of demo went great and at the end of the day I went to look at the travertine and noticed it was the wrong material!  I called Hector when I realized that I had ordered honed not tumbled and he agreed to meet me at a tile shop the next morning.  We found another alternative and he even got the tile price at his cost AND agreed to take the wrong tile back at no additional cost.  What I like about Hector is his easy going attitude and his ability to problem solve and always make you feel like its under control with a smile!  This could have been a really big nightmare for myself and my family with a torn up kitchen and it worked out great.  I even like the tile I picked out better than my first choice!  His pricing is really reasonable and he doesn't nickel and dime you like other companies.  Hector wasn't the cheapest bid, nor the most expensive, and I am so glad I went with him!  Our kitchen looks fabulous!"
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+48

Recommended by70%of homeowners
Radon Detection and Reduction FAQs, answered by experts

The cost to replace a radon fan ranges from $300 to $600 for the fan itself, with installation adding an additional $200 to $500. Overall, the total cost for replacement can range from $500 to $1,100, depending on factors such as the fan model, home size, and local labor rates. If the fan is part of a larger radon mitigation system, the price may be higher.

Installing a mitigation system reduces radon levels, which can cause lung cancer, providing peace of mind and long-term health benefits. It can also increase your home’s value, as many buyers prefer properties with radon safety measures in place. The investment is relatively low compared to the potential health risks associated with prolonged radon exposure.

Mitigation reduces radon levels, protecting your health and complying with safety standards.

Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.

Radon is a cancer-causing radioactive gas that poses serious health risks, infiltrating homes through foundation cracks and unnoticed spaces.

The San Jose, CA homeowners’ guide to radon detection and reduction services

From average costs to expert advice, get all the answers you need to get your job done.