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Q: What would cause radon in a house?

• <div><p>The natural breakdown of uranium in soil, rock, and water can cause radon to appear in a home. The gas seeps into homes through cracks in foundations, walls, or floors, as well as through gaps around pipes or construction joints. Radon levels are influenced by soil composition, building materials, and ventilation. Poorly sealed or airtight homes can trap radon, allowing it to accumulate.</p></div>

Q: Why is radon gas abatement necessary for homes?

• <div><p>Radon is a cancer-causing radioactive gas that poses serious health risks, infiltrating homes through foundation cracks and unnoticed spaces.</p></div>

Q: What steps should be taken if high radon levels are detected?

• <div><p>If high radon levels are detected, steps include sealing entry points, installing a mitigation system, and retesting the air regularly to ensure reduced levels.</p></div>

Q: How much does it cost to replace a radon fan?

• <div><p>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.</p></div>

Q: What if radon is still high after mitigation?

• <div><p>You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.</p></div>

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Verified Reviews for Radon Detection And Reduction pros in Groveland, CA

*The Angi rating for Radon Detection And Reduction companies in Groveland, 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 Groveland, 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 June 21, 2026

Reviewed in June 2026
Frank was prompt and honest had knowledge to fix our leak
At Your Service Plumbing
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Reviewed in May 2026
Company was great. Came out and clean my property that accumulates a lot of dust in between visits. Would certainly use again
Titan Professional Cleaning Services LLC
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Reviewed in March 2026
Nick has worked on our trees for several years now and we have been very pleased with his professionalism and communications. He is very safety conscious which is important to me. I would also say he leaves our property very clean and tidy.
Fries Timber
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Reviewed in July 2025
This was her first time cleaning my vacation home, and she did an excellent job. She is professional, punctual, and thoroughly cleaned the entire house. I am very satisfied.
Storey Cleaning Services
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Reviewed in February 2024
Project manager was efficient and professional notifying me of every step of project. There were minor quality issues like planks not properly nailed and wire fencing was loose but they fixed the problems after I contacted them.
Tal, LLC
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Reviewed in April 2023
I'm super pleased with the work that Concrete Innovations did at my house. They made a retaining wall that looks like large boulders, it makes the whole job look so beautiful! I'd recommend and use them again in a heartbeat. Thank you Michael and Richard for your excellent job.
Concrete Innovations, Inc.
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Reviewed in September 2022
He has a willing attitude, listen to instructions, and has many skills.
Boyer's Handyman Service-Unlicensed Contractor
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Reviewed in February 2021
They were great. Their estimate was far less than the other three bids I received and they did a wonderful job. Once the job was done and after the driveway was dried, they came back to make sure everything "sat up" well and touched up wherever needed. It looks like a completely new driveway...
North State Paving
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Find Radon detection and reduction specialists in Groveland

MG Remediation, Inc.

3.3(

)

Serving Groveland, 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."

Recommended by80%of homeowners

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A.K.I.I.

New to Angi

Serving Groveland, CA and surrounding areas

In business since 2003

Free estimates

K.T.W. Land Development provides local area consumers with superior quality land development and construction services. With years of experience in the industry, you can be sure your project will be handled promptly and professionally. Call K.T.W. Land Development today to schedule an appointment for your project estimate!

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Radon Detection and Reduction questions, answered by experts

The natural breakdown of uranium in soil, rock, and water can cause radon to appear in a home. The gas seeps into homes through cracks in foundations, walls, or floors, as well as through gaps around pipes or construction joints. Radon levels are influenced by soil composition, building materials, and ventilation. Poorly sealed or airtight homes can trap radon, allowing it to accumulate.

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

If high radon levels are detected, steps include sealing entry points, installing a mitigation system, and retesting the air regularly to ensure reduced levels.

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.

You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.

The Groveland, 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.

See all articles

Mitchell Grant
•
Mar 18, 2026Mar 18, 2026
How Much Does a Radon Mitigation System Cost? [2026 Data]
The cost of a radon mitigation system depends mostly on the type of system being installed. Use this guide to learn about your options.
Alison Kasch
•
Apr 6, 2026Apr 6, 2026
How Much Does Radon Remediation Cost? [2026 Data]
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.
Angi
•
Mar 18, 2026Mar 18, 2026
How Much Does Radon Testing Cost? [2026 Data]
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.
Amy Freeman
•
Jul 9, 2026Jul 9, 2026
Who Installs Radon Mitigation Systems?
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.
Jacqueline DeMarco
•
Jul 9, 2026Jul 9, 2026
What Is Radon and How Does It Get In Your Home?
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.
Jacqueline DeMarco
•
Jul 9, 2026Jul 9, 2026
What Is Radon Testing?
What is radon testing? Radon testing measures the presence and concentration of radon gas within indoor environments. Read on to learn more.