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Find Radon gas abatement pros in Seattle

Avatar for Cascade Radon Inc
Cascade Radon Inc
4.9(
157
)

Serving Seattle, WA and surrounding areas

In business since 1990

Free estimates

Emergency services offered

"Excellent from beginning to end. Very professional outfit from initial visit, quote, scheduling, work, followup. Price was reasonable, work quality went above and beyond, and radon levels dropped well below even the contractual level."
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+2

Recommended by99%of homeowners
Avatar for AMERICAN ENVIRONMENTAL CONSTRUCTION LLC
AMERICAN ENVIRONMENTAL CONSTRUCTION LLC
4.7(
101
)

Serving Seattle, WA and surrounding areas

In business since 2001

Free estimates

Credit card accepted

"Excellent company. Iwas freaked out and they calmed me down (call them before you lose sleep!) It's not as bad as it seems. Showed up right on time. Gave an excellent consult that didn't feel rushed nor about just making money (instead.. doing it right!). The actual remediation (all the dry wall in the bathroom, cutting new electrical holes, etc was done to perfection with a clean air test and no debris. They respected HOA rules and they got all this scheduled after permits. It was a seamless stress-free process and ironically it was also the most affordable."
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+15

Recommended by93%of homeowners
Avatar for National Property Inspections
National Property Inspections
5.0(
5
)

Serving Seattle, WA and surrounding areas

In business since 2015

Free estimates

Credit card accepted

"James inspected a newly installed $50k roof at my mom’s house. He had excellent attention to detail and identified issues that were not seen by another objective inspector. He was extremely responsive to texts and phone calls and offered us guidance on how to address the issues. He also charged $175 whereas the other inspector charged $425 for the same job and didn’t identify any issues. Highly recommend!"
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+2

Recommended by100%of homeowners
Buyers Protection Group (BPG)
3.5(
85
)

Serving Seattle, WA and surrounding areas

In business since 1989

Emergency services offered

Warranties offered

"BPG Inspections Failed to Honor Their Guarantee or Take Accountability Summary: In my experience, BPG Inspections failed to uphold their guarantee, and I encountered poor follow-up and vague, shifting justifications for denying my claim. Details: I hired BPG Inspections in Pensacola, FL, to inspect a home I purchased in April. The inspection occurred in March, and I moved in during May. Within a few days of moving in – well within the 90-day warranty period – I discovered two issues that the inspection report had explicitly marked as functional: 1. The garbage disposal unit did not work (it made a soft noise but did not function). 2. The HVAC system failed to deliver air to the kitchen and adjacent bedroom, though the inspection report had indicated the air handling was operational and in good condition. I promptly emailed BPG about these problems, and while the inspector initially responded, I was then passed to their claims department. After repeated follow-ups, I finally received a call on June 23rd – nearly a month after reporting the issue – only to be told that neither issue was covered under their warranty. I raised the following concerns: 1. For the HVAC, the inspector had confirmed it was functional in an email, contradicting the claims department's later justification that it could not be tested. If no air reaches two rooms, it should have been evident during either heating or cooling tests – this was missed. 2. For the garbage disposal, I was told it was a "kitchen appliance" and therefore not covered, despite it being a fixture included in inspections. When I asked where the warranty excluded it, I received inconsistent explanations. At no point did the company offer to re-inspect or further investigate these issues. I expected more accountability from a professional inspection service – especially one offering a guarantee."
Recommended by61%of homeowners
HOMETEAM INSPECTION SERVICE
5.0(
2
)

Serving Seattle, WA and surrounding areas

In business since 2009

Free estimates

Emergency services offered

.We provide Home and Pest Inspections in complete compliance and all guidelines as set by the State of Washington standards of practice. We are fully licensed, carry general liability as well as Errors and Omissions insurance and are members of NAHI and are AHIT certified. We provide narrative reports, with pictures, that are deliveded by email within 24 hours and a hard copy by mail if requested.

Recommended by100%of homeowners
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FAQs for radon gas abatement projects in Seattle, WA

The only way to know whether your home or water supply contains radon is to schedule a professional test. A qualified radon inspector will collect samples, deliver lab-verified results, and explain the findings for $150 to $800. Once you know your exact levels, you and your radon mitigation pro can choose the right system and tackle the problem before it affects your family’s health.

Both roles tackle radon, but they focus on different steps. Inspectors test your home, interpret the results, and determine whether levels exceed EPA guidelines. Mitigation pros design and install the system that lowers those levels. Some companies do both, but the skills and equipment differ, so always verify that the person you hire is properly certified for the specific service you need.

Installing a mitigation unit fixes radon problems by reducing indoor gas levels to established safe standards. A system designed and installed by a mitigation expert, tailored to your home's specific layout and foundation, guarantees effective radon reduction. This expert installation ensures consistent performance over time while safeguarding your indoor air quality.

Open windows and doors do not reduce radon levels because they trigger a pressure imbalance that draws radon-laden air into your home. This practice fails to control radon concentration and can even worsen the issue. An active suction mitigation system provides a proven, safe, and effective solution to reliably reduce radon levels.

Radon mitigation systems generally last between 10 and 30 years, depending on system type and maintenance. Passive systems endure the longest because they have no moving parts, whereas active systems, which use a fan, require fan replacement every 5 to 10 years. System components, such as PVC pipes, seals, and fittings, can remain effective for decades when paired with periodic inspections and proper maintenance.

Radon mitigation systems consume between 300 and 3,000 kWh of electricity per year, depending on fan size and system design. On average, an active radon fan draws 100 to 300 watts continuously, which translates to roughly 876 kWh annually, and adds $30 to $300 to your energy bill each year. Choosing a high-efficiency fan and ensuring tight sealing around pipes helps minimize these ongoing costs.

The Seattle, WA homeowners’ guide to radon gas abatements

From average costs to expert advice, get all the answers you need to get your job done.