Top-rated radon gas testers.

Get matched with top radon gas testers in Castle Rock, CO

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Radon gas testers in Castle Rock

Avatar for Lifetime Radon Solutions, Inc.
Lifetime Radon Solutions, Inc.
4.9(
120
)

Serving Castle Rock, CO and surrounding areas

Angi Approved

In business since 1993

Free estimates

Warranties offered

"Everyone I worked with was professional and answered all my questions. installation looks good. I have an Airthings continuous radon sensor. My radon was averaging 7 before. It is at 1.7 now."
Response time6 hrs
Response rate96%
86 neighbors recently requested a quote
Avatar for All Colorado Radon Mitigation Inc
All Colorado Radon Mitigation Inc
5.0(
38
)

Serving Castle Rock, CO and surrounding areas

Angi Approved

In business since 2012

Free estimates

Warranties offered

"All Colorado Radon Mitigation, Inc. is an incredible company to work with. They perform quality work, and they are truly friendly and professional. The system that they installed was straightforward, but the work was top-notch. Highly recommend!"
Basic Exterior System Pictures
Basic Exterior System Pictures
Basic Exterior System Pictures
Basic Exterior System Pictures
Additional Photos

+1

Response time2 days
Response rate95%
1 neighbors recently requested a quote
Avatar for Veteran Radon
Veteran Radon
5.0(
16
)

Serving Castle Rock, CO and surrounding areas

Angi Approved

In business since 2022

Free estimates

Emergency services offered

"Jason and Ken were quick to respond, very knowledgeable, and very friendly. They ensured that I understood the process and they did an efficient and thorough job installing a radon mitigation system in my home. I would highly recommend them. "
Radon Detection & Reduction Project
Radon Detection & Reduction Project
Radon Detection & Reduction Project
Radon Detection & Reduction Project
Radon Detection & Reduction Project

+1

1 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for PowerHouse Home Performance
PowerHouse Home Performance
5.0(
8
)

Serving Castle Rock, CO and surrounding areas

Angi Approved

Super Service Award Winner

In business since 2025

Free estimates

Warranties offered

"I can't say enough about Josh, our service man. He was on time an finished the job to our satifaction. He would be the one to call on any radon probleml To any one who has a radon problsem he is the one to call!!!! Tom"
Mitigation System
Vapor Barrier
Mitigation System
Mitigation System
Mitigation System

+1

Response time1 day
Response rate92%
3 neighbors recently requested a quote
Avatar for RF Home Inspections LLC
RF Home Inspections LLC
5.0(
7
)

Serving Castle Rock, CO and surrounding areas

Angi Approved

In business since 2024

Free estimates

Warranties offered

"As a Real Estate Agent, i have been a part of hundreds of Home Inspections and i was more than impressed with the knowledge, professionalism, and willingness to educate my Buyers about every aspect of the home. Not an over alarmist like Axium Inspections are, and more friendly than any other Inspection Company that I have worked with in the past. All Agents have their preferred Inspection Company but, I would hire RF before I worked with anybody else."
Full Home Inspection
Full Home Inspection
Full Home Inspection
Full Home Inspection
Full Home Inspection

+6

Response time3 hrs
2 neighbors recently requested a quote
Avatar for DRYmedic of Parker CO
DRYmedic of Parker CO
5.0(
5
)

Serving Castle Rock, CO and surrounding areas

Angi Approved

In business since 2024

Free estimates

Emergency services offered

DryMedic Restoration Services specializes in a comprehensive range of restoration services, including:​ Water Damage Restoration: Addressing issues caused by leaks, floods, or other water-related incidents.​\nFire Damage Restoration: Repairing and restoring properties affected by fire and smoke.​\nMold Remediation: Identifying and removing mold to ensure a safe environment.​\nStorm Damage Restoration: Handling damages resulting from severe weather conditions.​\nContents Restoration: Restoring personal belongings damaged by water, fire, or mold.​\nBiohazard Cleanup: Managing the safe removal of hazardous materials.

Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+12

Response time11 hrs
Best Option Restoration
5.0(
4
)

Serving Castle Rock, CO and surrounding areas

Angi Approved

In business since 2017

Free estimates

Emergency services offered

"I had never used Best Option Restoration before but had been referred to them by my neighbor. I was surprised by how quickly they responded (which was nice because I was pretty concerned). The same day, I had one of their managers out to my property to inspect the damage himself. He then reviewed the project with me, including the cost, the process for using my insurance, and the timeline. The work was completed on time. What I found most impressive was the communication throughout the entire process. I didn't feel like I was 'just another customer.' I have referred them to several within my neighborhood. I hope I don't have another broken pipe, but if I do, I know who I will call."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+8

Response time6 hrs
Recommended by75%of homeowners
...
Showing 1-10 of 128
FAQs for radon gas testing projects in Castle Rock, CO

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 Castle Rock, CO homeowners’ guide to radon gas testings

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