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Find Radon gas testers in Downingtown

Avatar for AmeriSure Home Inspection, LLC
AmeriSure Home Inspection, LLC
4.6(
30
)

Serving Downingtown, PA and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

"Tom was wonderful and extremely thorough! He explained everything as he went along and I left feeling like I really knew the ins and outs of the property. He was extremely personable and very professional. He called to schedule and follow up prior to the date of the inspection. I felt confident in him during the entire process. I would recommend him to anyone."
Home Inspection
Home Inspection
Home Inspection
Home Inspection
Response time6 hrs
6 neighbors recently requested a quote
Recommended by76%of homeowners
Avatar for SIS Mold & Home Inspections
SIS Mold & Home Inspections
5.0(
2
)

Serving Downingtown, PA and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

"I have worked with SIS on numerous occasions as I completely trust them with my testing needs (mold & radon). They are responsive and knowledgeable, having extensive training and experience. Bob and Mary Ann are professional and courteous while providing a competitive price for their services. I highly recommend SIS for mold and radon testing!"
Toxic Mold
Mold under rug at bathroom
Subfloor and joist
Basement Closet
Bedroom Closet

+3

Response time4 hrs
2 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for BOR of Montgomery County
BOR of Montgomery County
5.0(
1
)

Serving Downingtown, PA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

At Best Option Restoration of Montgomery County, we specialize in comprehensive disaster restoration services. Our team is dedicated to safeguarding homes and businesses from the damaging effects of mold, water, and storms. Here’s what sets us apart:\n\nMold Remediation: Our certified experts assess and isolate mold contamination, ensuring thorough removal and preventing further spore spread. We identify the root cause, devise effective solutions, and prioritize your safety.\nWater Removal and Storm Damage Restoration: When water wreaks havoc due to storms or other incidents, we’re here to help. Our 24/7 emergency response team swiftly tackles water extraction, drying, and structural repairs.\n\nComprehensive Services: Beyond mold and water remediation, we handle storm damage repairs, basement flood cleanup\nChoose Best Option Restoration of Montgomery County for reliable, efficient, and compassionate restoration services. We’re committed to restoring peace of mind and protecting your property.

9 neighbors recently requested a quote
Avatar for Radon-Rid LLC
Radon-Rid LLC
5.0(
212
)

Serving Downingtown, PA and surrounding areas

In business since 2004

Free estimates

Warranties offered

"Radon level was 11.5 before remediation and .24 after, so the result could not have been better. The installer, Dave, was first class from start to finish and owner Marc graciously adjusted his schedule to fit me in sooner as I requested. My only complaint was the price, and only because the home inspector who tested the radon levels told me the cost would be $800 to $1,500. My realtor said about $1,000."
Recommended by99%of homeowners
Avatar for Real Estate Inspections
Real Estate Inspections
4.9(
49
)

Serving Downingtown, PA and surrounding areas

In business since 2002

Free estimates

Warranties offered

"Very professional and courteous. Received discounts for both Level 1 and Level 2 inspections. Report was very thorough. Even offered to review repair estimates to determine which is reasonable."
Recommended by97%of homeowners
Avatar for Anvil Radon Services
Anvil Radon Services
5.0(
15
)

Serving Downingtown, PA and surrounding areas

In business since 2017

Free estimates

Emergency services offered

"Incredibly well! The people from Anvil were kind, courtesy, and professional from the moment I called until they left my home. Highly recommend using them if you are having any concerns at all around Radon. Tom was especially helpful and knowledgeable."
Recommended by100%of homeowners
Avatar for Foundation Home Inspections LLC
Foundation Home Inspections LLC
5.0(
13
)

Serving Downingtown, PA and surrounding areas

In business since 2015

Free estimates

Warranties offered

"The home inspections performed by Bill were professional, descriptive and comprehensive. I hired Bill to perform two home inspections and I was extremely delighted with his knowledge and expertise of the various components within the inspection process. He provided his professional and honest opinion based on his knowledge and experience, which assisted with decisions in the home purchase process. We appreciated his thorough services."
Recommended by100%of homeowners
Avatar for Landmark Inspections LLC
Landmark Inspections LLC
5.0(
97
)

Serving Downingtown, PA and surrounding areas

In business since 2007

Free estimates

Warranties offered

"As a first time home buyer at the age of 26, I was not sure what to expect with the inspection. Scott was a pleasure to work with from the start. He was very professional from our first phone call. He made it very clear how the process would work on the day of inspection and outlined all costs before we even scheduled with him. This professionalism continued into the day of the inspection. He was early to the house. He was very thorough as he inspected every inch of the outside and inside of the house, top to bottom. He allowed us to walk along with him and effectively answered any questions we had. He got our report back to us the next night after the inspection because he knew we were on a tight timeline with closing. Everything he mentioned to us as we walked through the house was on the inspection report with pictures included. He even answered promptly when I had additional questions after we heard back from the selling side about our repair request. I highly recommend using Scott for your home inspection. I will be using him again when I move next."
Recommended by100%of homeowners
STRONG FOUNDATIONS HOME INSPECTIONS
5.0(
48
)

Serving Downingtown, PA and surrounding areas

In business since 2002

Free estimates

Warranties offered

"Nick was very thorough with the inspection and explained what he was looking at and why in a way that a non-technical person (like me) could understand. He was very patient fielding questions, no matter how small the detail. He was very pleasant and easy to work with. Thanks to Nick, we uncovered a few issues in various parts of the house (important but not structural) that we presented to the seller for remediation. We really appreciate his thoroughness and attention to detail throughout the whole house."
Recommended by100%of homeowners
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FAQs for radon gas testing projects in Downingtown, PA

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 Downingtown, PA homeowners’ guide to radon gas testings

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