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

Avatar for Tri-State Radon and Mold, Inc.
Tri-State Radon and Mold, Inc.
4.8(
66
)
Radon Gas - AbatementRadon Gas - Testing

Serving Waynesville, OH and surrounding areas

In business since 2010

Free estimates

Warranties offered

"Andy from Tristate was a real professional. He was prompt, knowledgeable and the entire analysis was completed on time with an easy to understand report. We will use this company every 2 years to monitor radon. We could not be more pleased with Andy and Home Builder! John Seifert"
Recommended by98%of homeowners
Avatar for Radon Technology, Inc.
Radon Technology, Inc.
4.6(
32
)
Radon Gas - AbatementRadon Gas - Testing

Serving Waynesville, OH and surrounding areas

In business since 1993

Free estimates

Warranties offered

"I live in Florida. I hired Radon Technology to install a system in a home that weâ re selling in Ohio. Jourdan answered all my questions via email or over the phone. Radon Technology found a solution when another company claimed, â no way!â Radon Technology warrants the systemâ s performance and that warranty is transferable, which is perfect for me. Did I say that the price they quoted was surprisingly affordable? Had I known that I had had a radon issue, then I would have installed this system sooner."
Exterior Radon System
Response time1 day
Recommended by100%of homeowners
Avatar for The Ohio Home Inspections Co
The Ohio Home Inspections Co
4.0(
7
)
Radon Gas - AbatementRadon Gas - Testing

Serving Waynesville, OH and surrounding areas

In business since 2003

Free estimates

Credit card accepted

"Kevin was very thorough, easy to work with, and provided an excellent report. He also continues to send monthly newsletters at no additional charge that have very helpful tips and information about home maintenance."
Additional Photos
Additional Photos
Recommended by71%of homeowners
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.

There are steps you can take as a homeowner to remediate radon yourself. While a radon reduction professional can make the biggest impact in your home, you can make efforts to improve radon levels on your own by sealing cracks, increasing ventilation, and testing for radon regularly.

A homeowner can install a radon mitigation system on their own. But it’s a challenging DIY that requires a lot of knowledge about radon mitigation as well as familiarity with local regulations. You do not want to risk an improper installation that leaves the system unable to detect radon or gives it a shortened life span. Relying on a professional is the surest way to guarantee a successful installation.

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.

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 Waynesville, OH 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.