Top-rated radon detection and reduction specialists.

Best radon detection and reduction specialists near Marion, WI

Q: What are the risks of radon?

• <div><p>Radon is the number one non-smoking cause of lung cancer in the United States, but it can cause some other concerning side effects in the meantime. If you have a raspy voice, chest pains, trouble breathing, difficulty swallowing, or any of the above, don&rsquo;t hesitate to perform radon testing and install a mitigation system as soon as possible.</p></div>

Q: Why is my radon mitigation system so loud?

• <div><p>Your radon mitigation system may be loud because it&rsquo;s time to replace it. Any sounds are usually from the inline fan that helps create the vacuum and resulting airflow. If you hear a new, loud mechanical or humming noise from your radon fan, it might be time to replace it. Most fans used in radon mitigation systems last up to 10 years, but may need to be replaced sooner.</p></div>

Q: How often should you replace a radon fan?

• <div><p>Many radon fans carry a five-year manufacturer's warranty. That said, your radon fan should last between five and ten years. Regular inspections will ensure the fan is operating properly. Unusual or exceptional noise coming from the fan or indications on your manometer or system monitor can immediately tell you that something is amiss.</p></div>

Q: What is the biggest source of radon?

• <div><p>The soil beneath your house is most likely what&rsquo;s causing an increased level of radon. This is because soil holds radioactivity for a long time and it&rsquo;s also what most buildings are built on. Another common source of radon is water from a source that hasn&rsquo;t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.</p></div>

Q: How much does a radon mitigation system cost?

• <div><p>The cost for a radon mitigation system typically ranges from $800 to $1,500, with an average around $1,000. The final price depends on several factors, including the size of your home, the severity of the radon issue, and the type of system required. Your home's foundation type also significantly impacts the cost. For example, sealing and ventilating an unfinished basement might cost around $4,600, while encapsulating a crawl space without a foundation slab can range from $1,500 to $15,000.</p></div>

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Verified Reviews for Radon Detection And Reduction pros in Marion, WI

*The Angi rating for Radon Detection And Reduction companies in Marion, WI 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 Marion, WI 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 07, 2026

Reviewed in May 2026
The job was done right and very efficient. They cleaned up everything around the house and everything looks great.
Brothers Exteriors Solution LLC
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Reviewed in August 2025
In order to reduce my homeowners insurance my roof needed to be replaced and time was of the essence. John Bennett and crew squeezed me into their schedule and replaced my roof, gutters and downspouts. Wow! Exceptional workmanship , professional in every way, excellent communication, and I...
Bennett's Home Repair, LLC
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Reviewed in April 2025
They came by and explained what was needed and were willing to fix it. Very professional. And easy to talk to.
Brandon and Scott's Services, LLC
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Reviewed in April 2025
Work was done well, cleanup was good. Workman was pleasant and easy to talk and give direction.
Great River Road & Lawn
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Reviewed in January 2024
They got the job done quickly and all the staff were professional and personable. Owen the project manager was very efficient and prompt. Cheyenne, the receptionist, was a delight to work with.
Classic Roof Replacement
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Reviewed in December 2023
Very friendly, personable and professional! Great communication and does amazing work!!! would highly HIGHLY recommend!!!
Preston Berg Handyman & Remodeling Pro
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Reviewed in November 2023
It was the best project yet!!!! Was completed timely and with a high degree of craftsmanship and quality. It exceeded my expectations.
Richart Construction LLC
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Reviewed in October 2022
Look, Chance, owner/operator, is a stand up guy, very professional and easy to talk to. The crew showed up and completed a new shingle install on my home in a day! Cmon who does this! My house has multiple hips and valleys and it's more of a puzzle really. But Chance and his TKK crew...
TKK Construction, LLC
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Reviewed in September 2022
I needed my sewer and drain fixed and cleaned and they were on it the same day I asked I was very impressed . He was very polite and did a fantastic job
Scour Sewer and Drain, LLC
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Reviewed in January 2022
My husband and I had five windows replaced in our home and we were both very impressed with the quality of the product and the professionalism of the staff.
Mad City Windows & Baths
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Top-Rated Radon detection and reduction specialists in Marion - Updated Nov 2026

Fox Valley Radon LLC

4.9(

)

Radon Gas - AbatementRadon Gas - Testing

Serving Marion, WI and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Warranties offered

Small jobs welcome

"MIke was a breeze to work with and very knowledgeable when it came to testing our home for radon. Super impressed by his professionalism!"

Response time2 days

2 neighbors recently requested a quote

Recommended by85%of homeowners

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House Of Home Inspection, LLC

5.0(

)

Radon Gas - Testing

Serving Marion, WI and surrounding areas

Approved

In business since 2021

Free estimates

Customers say: Quick response

State licensed home inspector. Weekend appointments available.

Response time3 hrs

Recommended by100%of homeowners

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Lifetime Home Services

4.8(

130

)

Radon Gas - AbatementRadon Gas - Testing

Serving Marion, WI and surrounding areas

In business since 1993

Free estimates

Credit card accepted

"They did a radon test in a timely fashion. I am going to hire them to do a mitigation service for my ho,e."

Response time1 day

Response rate90%

Recommended by97%of homeowners

Serving Marion, WI and surrounding areas

In business since 2022

Free estimates

Credit card accepted

Welcome to J2b Inspections LLC! We take pride the quality of work and customer satisfaction that we give each and every customer! We are known to pay exquisite attention to detail while making customer satisfaction our top priority. Call us today to learn more about how we can help you! Proudly serving those who serve and have served we offer First Responder, Military, Senior and Veteran discounts.

Response time3 hrs

Recommended by100%of homeowners

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JW Rothrock Inc

New to Angi

Radon Gas - AbatementRadon Gas - Testing

Serving Marion, WI and surrounding areas

In business since 1994

For lead testing and other specialty services JW Rothrock Inc. is Wisconsin's premier in lead testing as well as abatement. For cost effective and professional service JW Rothrock is by far above and beyond the rest.

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Radon Detection and Reduction FAQs, answered by experts

Radon is the number one non-smoking cause of lung cancer in the United States, but it can cause some other concerning side effects in the meantime. If you have a raspy voice, chest pains, trouble breathing, difficulty swallowing, or any of the above, don’t hesitate to perform radon testing and install a mitigation system as soon as possible.

Your radon mitigation system may be loud because it’s time to replace it. Any sounds are usually from the inline fan that helps create the vacuum and resulting airflow. If you hear a new, loud mechanical or humming noise from your radon fan, it might be time to replace it. Most fans used in radon mitigation systems last up to 10 years, but may need to be replaced sooner.

Many radon fans carry a five-year manufacturer's warranty. That said, your radon fan should last between five and ten years. Regular inspections will ensure the fan is operating properly. Unusual or exceptional noise coming from the fan or indications on your manometer or system monitor can immediately tell you that something is amiss.

The soil beneath your house is most likely what’s causing an increased level of radon. This is because soil holds radioactivity for a long time and it’s also what most buildings are built on. Another common source of radon is water from a source that hasn’t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.

The cost for a radon mitigation system typically ranges from $800 to $1,500, with an average around $1,000. The final price depends on several factors, including the size of your home, the severity of the radon issue, and the type of system required. Your home's foundation type also significantly impacts the cost. For example, sealing and ventilating an unfinished basement might cost around $4,600, while encapsulating a crawl space without a foundation slab can range from $1,500 to $15,000.

The Marion, WI 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

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Apr 6, 2026Apr 6, 2026
How Much Does Radon Remediation Cost? [2026 Data]
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How Much Does a Radon Mitigation System Cost? [2026 Data]
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Sep 23, 2026Sep 23, 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.
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•
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.
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•
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.
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Jul 8, 2026Jul 8, 2026
How to Test for Radon in Your Home
Knowing how to test for radon will keep your home free and safe from this odorless gas—you just have to decide whether to do it yourself or hire a pro.