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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 June 29, 2026

Find Radon detection and reduction specialists in Spencer

Avatar for Iowa Radon Defense Northwest
Iowa Radon Defense Northwest
4.7(
54
)

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."
Interior Exhaust Fan
Crawlspace Encapsulation with Radon Mitigation
Exterior Exhaust Fan and Discharge
Exterior Exhaust Fan with Cover
Roof Penetration Discharge Pipe with Roof Boot

+23

Response time1 day
20 neighbors recently requested a quote
Recommended by96%of homeowners
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Avatar for SWAT Environmental, Inc.
SWAT Environmental, Inc.
4.5(
13
)

Serving Spencer, IA and surrounding areas

In business since 1988

Free estimates

Credit card accepted

"They did a great job with the installation and made sure the Radon was under the level it needed to be. He had to make a couple of trips to make that happen but was very polite and profession through the whole process."
Response time1 day
Recommended by100%of homeowners
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Avatar for Home Sweet Home Inspect Iowa Facebook
Home Sweet Home Inspect Iowa Facebook
4.8(
12
)

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!"
Roof Inspection
Venting conduit
Company Logo
A service
Promotions.Because you deserve it!

+11

Response time3 hrs
Response rate88%
Recommended by100%of homeowners
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Professional House Doctors
New to Angi

Serving Spencer, IA and surrounding areas

In business since 2006

Free estimates

Credit card accepted

We pride ourselves in providing quality work for all of our customers. Your safety in your home or office is forefront in our minds when we work. We have built several relationships with local business and homeowners that we know will last a lifetime. When looking for a company that can give you peace of mind when working or living in your space look no further then Professional House Doctor.

Response time1 day
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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.

Installation typically takes 1-2 days, depending on the system and property layout.

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.

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

No level of radon is technically safe, but since it is naturally present everywhere, it is impossible to avoid entirely. The average radon level in homes across the United States is 1.3 picocuries per liter (pCi/L). The Environmental Protection Agency (EPA) recommends taking action to reduce radon levels if your home's test results are between 2 and 4 pCi/L or higher.

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.

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