Top-rated radon detection and reduction specialists.

Get matched with top radon detection and reduction specialists in Spencer, IA

Q: How do you remove radon from your home?

• <div><p>You can vent radon out of your house sometimes by simply opening a window, but it won&rsquo;t remove the source, and will likely rise above recommended levels quickly. A professional will be needed to assess your home, and determine the best strategy for radon removal. Active radon sump pumps and soil depressurization systems are often used to forcefully vent the radon from your home.</p></div>

Q: How do I test for radon gas?

• <div><p>Use a radon test kit or hire professionals to conduct a detailed assessment of radon levels in your home.</p></div>

Q: What types of radon mitigation systems are available?

• <div><p>Options include sub-slab depressurization, crawlspace ventilation, and sealing cracks. Choose based on home construction and radon levels.</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>

Q: Do radon mitigation systems come with warranties?

• <div><p>Yes, many systems include warranties for performance. Confirm terms with your installer.</p></div>

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Verified Reviews for Radon Detection And Reduction pros in Spencer, IA

*The Angi rating for Radon Detection And Reduction companies in Spencer, IA 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 Spencer, IA 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 November 15, 2025

Reviewed in November 2025
Good installation and good customer service
Mad City Windows & Baths
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Reviewed in November 2025
Painted large garage walls and ceiling. Did an excellent job and will hire them again in summer of 2026. Highly recommend.
True Paint LLC
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Reviewed in October 2025
Installed fence and trained us how everything worked trained our little frencie all in a couple hrs works great
Dog Guard
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Reviewed in September 2025
On time, efficient and honored the quote! Will use this company again if I jave an appliance repair need!
Mr. Appliance of Spencer
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Reviewed in April 2025
I had read reviews about Todd and people that had vouched for him and his work and now I am one of those same people that will highly recommend Todd and vouch for his work. Todd redid my basement bathroom from the flood last summer and was definitely more affordable than the people that brag...
Huck's Home Repair
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Reviewed in December 2024
Jordan did an excellent job. We used Jordan 3 times this summer and did an excellent job and was very prompt and professional and would recommend him.
iPlumb Plumbing, LLC
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Reviewed in March 2022
They where professional and reasonably priced. Cleaned up afterwards and realy pleasant to deal with.
Galbraith Electric, LLC
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Reviewed in January 2022
I am overall very pleased with this company. They want above and beyond to ensure that I was satisfied with the experience. I would highly recommend them to others that are new to the area and looking for a company to help them clean a new home.
In-Home Solutions
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Reviewed in December 2021
Arrived on time and completed work as requested
Gregor Made, LLC
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Reviewed in October 2021
They have been excellent and I have no problems with them. I like that I can make an appointment and they can work me in. I would highly recommend them.
Exhaust Pros
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Find Radon detection and reduction specialists in Spencer

Iowa Radon Defense Northwest

4.7(

)

Serving Spencer, IA and surrounding areas

Approved

In business since 2020

Free estimates

Warranties offered

"Radon mitigation work was great. Duct cleaning is something I will not recommend from this company. Team started to cutopen HVAC duct and later figured out the machine is not working , followed different approach to clean each vent. I contacted sales person and he said it is going to be same results either way and same price was charged. Charged 1.7k for 3400 sq ft home for duct cleaning."

Crawlspace Encapsulation with Radon Mitigation

Roof Penetration Discharge Pipe with Roof Boot

+23

Response time1 day

27 neighbors recently requested a quote

Recommended by96%of homeowners

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Home Sweet Home Inspect Iowa Facebook

4.8(

)

Serving Spencer, IA and surrounding areas

In business since 2020

Free estimates

Small jobs welcome

"Luis was very polite and professional! He explained the issues so I could understand. I would absolutely recommend him to others!"

+11

Response time3 hrs

Response rate88%

Recommended by100%of homeowners

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Radon Detection and Reduction questions, answered by experts

You can vent radon out of your house sometimes by simply opening a window, but it won’t remove the source, and will likely rise above recommended levels quickly. A professional will be needed to assess your home, and determine the best strategy for radon removal. Active radon sump pumps and soil depressurization systems are often used to forcefully vent the radon from your home.

Use a radon test kit or hire professionals to conduct a detailed assessment of radon levels in your home.

Options include sub-slab depressurization, crawlspace ventilation, and sealing cracks. Choose based on home construction and radon levels.

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.

Yes, many systems include warranties for performance. Confirm terms with your installer.

The Spencer, IA 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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How Much Does Radon Remediation Cost? [2026 Data]
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•
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How Does a Radon Mitigation System Work? And How Do You Keep Yourself Safe?
How does a radon mitigation system work? Learn more about how it pulls air and radon from the soil and expels it before it can enter your house.
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•
May 2, 2026May 2, 2026
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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.