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*The Angi rating for Radon Detection And Reduction companies in Honolulu, HI 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 Honolulu, HI 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 September 30, 2025

Find Radon detection and reduction specialists in Honolulu

Avatar for Arete Home Inspectors
Arete Home Inspectors
5.0(
6
)
Radon Gas - Testing

Serving Honolulu, HI and surrounding areas

In business since 2008

Free estimates

Small jobs welcome

"So thankful for Joe! He responded promptly and was able to conduct his inspection the very next day. Very professional, knowledgeable and kind. I will be recommending Arete Home Inspectors to everyone. Mahalo nui!"
Kailua inspection
Response time1 day
Recommended by20%of homeowners
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Avatar for Hippo Home Inspections
Hippo Home Inspections
5.0(
1
)
Radon Gas - Testing

Serving Honolulu, HI and surrounding areas

In business since 2021

Free estimates

Credit card accepted

Hippo Home Inspections is the solution to all of your home inspection needs. We take great pride in our extreme professionalism, timeliness, and superior customer service on every job. We make sure to develop a lasting relationship, so that the next time service is needed, there will be no question on who to call.

Response time1 day
35 neighbors recently requested a quote
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Radon Detection and Reduction questions, answered by experts

Mitigation reduces radon levels, protecting your health and complying with safety standards.

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.

No, radon mitigation systems do not decrease home value or make a home harder to sell. In areas where homes experience similar radon exposure risks, a radon mitigation system is viewed as an improvement. Potential homebuyers often opt to buy a home with a radon mitigation system already installed to reduce the risk of cancer for their families.

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.

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.

The Honolulu, HI 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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