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*The Angi rating for Radon Detection And Reduction companies in Ontario, OR 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 Ontario, OR 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 January 20, 2026

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Avatar for Presidential Inspections, LLC
Presidential Inspections, LLC
4.1(
51
)

Serving Ontario, OR and surrounding areas

Approved

In business since 2004

Free estimates

Small jobs welcome

"Craig Burton, the person who responded to my call and conducted the air quality testing was highly professional and enlightened me about the process from start to finish. Beyond the actual samples taken indoors and outside my home to set up the differential readings needed, he took moisture & thermal readings in the area of concern. I felt confident when samples were sent off that mine would not be confused with anyone elseâ s and that the manner in which they were conducted would assure accurate testing."
Improperl Installed Insualtion
Visible Mold
Frozen Pipes
No vapor barrier in the crawl space
Worn Roof

+3

Response time8 hrs
6 neighbors recently requested a quote
Recommended by79%of homeowners
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Radon Detection and Reduction questions, answered by experts

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.

Keeping radon from getting into your home is much better than having to get rid of it once it's already indoors. While there may not be a way to fully prevent radon from getting into your home, there are things you can do to reduce the gas's ability to enter. 

Sealing foundation cracks and openings can help keep the gas from seeping inside. Improving air flow, such as by opening windows, can also be helpful. If you're building your home from scratch, talk to your contractor about using radon-resistant construction to keep the gas out.

No level of radon is technically safe, but since it is present everywhere, complete avoidance is impossible. 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 preventative measures if your home's radon levels are between 2 and 4 pCi/L or higher.

No, air purifiers are not an effective way to reduce or remove radon. Radon is a radioactive, inert gas that cannot be filtered by standard air purifiers, which are designed to capture particulates like dust and mold. While an air purifier can improve indoor air quality by removing other pollutants, it should not be relied upon for radon. The only effective solution for high radon levels is a dedicated radon mitigation system.

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 Ontario, OR 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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