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*The Angi rating for Radon Detection And Reduction companies in Marion, IN 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, IN 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 March 25, 2026

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

Avatar for Air Xray
Air Xray
3.3(
111
)
Radon Gas - AbatementRadon Gas - Testing

Serving Marion, IN and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"Get quote from air xray before getting your system installed. This company has unique way to install system without making hole in your wall. A little expensive but very professional and experienced in this area."
CO2
CO
Solutions
Radon
Sick Building Syndrome

+6

Response time1 day
Response rate97%
106 neighbors recently requested a quote
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Swat Group, Inc.
4.4(
152
)
Radon Gas - Abatement

Serving Marion, IN and surrounding areas

In business since 1988

Free estimates

Credit card accepted

"Hired for the convienience of their timely ability to install a radon system. The vent on the outside of the house is a large diameter, circular chimney that is very unsightly. Prices were a bit higher than other companies, but their ability to install quickly took precedence. In SWATs defense, I did not inform the company of my displeasure as the system was being installed as a condition of sale."
Response time1 day
Recommended by94%of homeowners
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Radon Detection and Reduction FAQs, answered by experts

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.

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

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

The average radon mitigation system uses about 876 kWh of electricity per year, although the exact amount of electricity used will vary depending on the size of the radon fan. Once the system is installed, the annual increase to your energy bill could range from $30 to $300 per year, again depending on the size of the fan.

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

The Marion, IN 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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