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*The Angi rating for Radon Detection And Reduction companies in Alta Loma, CA 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 Alta Loma, CA 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 April 29, 2026

Find Radon detection and reduction specialists in Alta Loma

Avatar for Roof Rx
Roof Rx
4.2(
1,190
)

Serving Alta Loma, CA and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"not that great. basically paid $99 to get an estimate. included cleaning roof and minimal repairs. took a while to get appointment, and then when they came, they didn't even do the work! gave a really big estimate and then re-seheduled to have someone else do the work. they wouldn't totally replace the roof, gave different estimates to repair, I went with a different company to do a full roof rplacement."
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Roof Leak Repair
Recommended by81%of homeowners
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Avatar for Home Restoration and Design
Home Restoration and Design
5.0(
1
)

Serving Alta Loma, CA and surrounding areas

In business since 1995

Emergency services offered

Credit card accepted

We are open Monday thru Saturday 7am to 7 pm. We are here to serve you with professionalism and quality remodels, don't settle for less. Shop us first, we are licensed and insured and provide great customer service!

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+14

Recommended by100%of homeowners
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Radon Detection and Reduction questions, answered by experts

Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.

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.

The fan that pulls the radon out of the air needs to run continuously, so you may see an increase in your electric bill once you install the mitigation system. Additionally, you may see an increase in your heating or cooling bills, as the fan can cause some loss of hot or cool air.

Yes, many systems include warranties for performance. Confirm terms with your installer.

The Alta Loma, CA 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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