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Find Radon gas testers in Portland

Avatar for Rose City Laboratories, LLC
Rose City Laboratories, LLC
5.0(
2
)
Radon Gas - Testing

Serving Portland, OR and surrounding areas

Approved

In business since 2012

Free estimates

Small jobs welcome

Science First. We are experts in our field and we will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business.

Response time2 days
Response rate90%
Recommended by100%of homeowners
Avatar for Nordic Service Group, LLC
Nordic Service Group, LLC
5.0(
9
)
Radon Gas - Testing

Serving Portland, OR and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

"Chris was fantastic to talk to about what he checks for during the inspection and what i should expect to see on his report. Chris was on time, incredibly thorough and detailed. I highly recommend him to anyone looking for a great home inspector."
Response time3 hrs
Response rate93%
33 neighbors recently requested a quote
Avatar for John's Waterproofing Co.
John's Waterproofing Co.
4.0(
72
)
Radon Gas - Testing

Serving Portland, OR and surrounding areas

Approved (Corporate)

In business since 1974

Free estimates

Warranties offered

"A technician named John did a crawl space inspection and said I had no mold and no rodents and did not need their services. He was professional, friendly and honest. i just received a quote for $12,000 from another contractor for work that did not need to be done or that I could do myself."
Encapsulation System
Before Encapsulation
Before Interior Drain System
After Interior Drain System
Finished basement

+38

Response time6 hrs
128 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Blue Roof Home Inspections
Blue Roof Home Inspections
New to Angi
Radon Gas - Testing

Serving Portland, OR and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

Choosing the right home inspector can be a difficult. Unlike most professionals, you probably won't get to meet your home inspector before hiring them. Furthermore, different inspectors have varying qualifications, experiences, equipment, reporting methods, and pricing. One thing for sure is that a quality home inspection requires a lot of work, and a thorough inspections depends heavily on the individual inspectors effort. If you honor us by permitting us to inspect your new home, we guarantee to give our very best effort and perform the inspection as if we are buying the home ourselves. This we promise to you. We look forward to earning your business! \n

Home Inspection Review
5 neighbors recently requested a quote
Avatar for Propertyexam
Propertyexam
4.6(
18
)
Radon Gas - Testing

Serving Portland, OR and surrounding areas

In business since 1986

Free estimates

Emergency services offered

"Everything has gone well. I have always received a quick response from him within the same day. He knows his stuff and educated me on a few things as well. He is definitely a great guy to work with."
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+4

Recommended by100%of homeowners
Really Fast Rapid Radon Remediation
5.0(
1
)
Radon Gas - Testing

Serving Portland, OR and surrounding areas

In business since 2010

Free estimates

"The service went better than we could have expected. We were contacted right away and were given a quote. Work started when we wanted it to and was finished in a timely manner. The workers on site were very considerate, asked questions, and were more than respectful of our home and our wishes. I would highly recommend Really Fast Rapid Radon Remediation to anyone needing work done to their home."
Recommended by100%of homeowners
Showing 1-10 of 31
FAQs for radon gas testing projects in Portland, OR

Radon is the second leading cause of lung cancer in the U.S. The gas seeps through cracks in foundations and collects in basements and other low areas. Once you breathe it in, radioactive particles lodge in lung tissue and do long-term damage. Because you can’t see or smell radon, the EPA recommends testing your home every two years—and after major renovations—to keep your family safe.

Yes—every home should be tested. The EPA advises doing it at least every two years and any time you remodel, buy, or sell. On average, one in 15 houses nationwide sits above the recommended limit, and the only way to know where yours stands is a formal test. The equipment simply measures gas levels and won’t change your indoor environment, so the process is completely harmless.

Certified radon professionals—often home inspectors or dedicated radon mitigation contractors—handle testing. These radon testing professionals follow EPA protocols and use calibrated instruments to check levels throughout your house. Hiring a certified radon specialist means results you can trust for real estate deals, insurance requirements, and, most importantly, your family’s health.

Inspectors specialize in measuring radon gas levels, while licensed mitigation contractors design and install the systems that remove it. If your test comes back high, your inspector can point you to a qualified mitigation pro who will size and install the right fan, piping, or other equipment to bring levels down.

No—standard home air purifiers don’t touch radon. They’re built to trap dust and pollen, not radioactive gas. If testing shows high levels, you’ll need a dedicated mitigation system that vents the gas from beneath your home to the outdoors. Relying on a room purifier alone won’t keep your indoor air safe.

Opening a few windows in your home might dilute radon for a short time, but the gas seeps back in as soon as they’re closed. For a lasting fix, you’ll need a professional mitigation system—often a sub-slab depressurization fan—that pulls radon from beneath the foundation and safely vents it outside.

The Portland, OR homeowners’ guide to radon gas testings

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