Radon Testing & Mitigation in Castle Rock, CO
Castle Rock sits at about 6,224 feet in Douglas County, between Colorado Springs and Denver. Douglas County is EPA Radon Zone 1 and is among the Colorado counties where elevated residential readings are most consistently reported. The combination of the local geology and the local housing style is not a coincidence.
Why radon behaves the way it does in Castle Rock
The ground underneath
The town and the butte it is named for sit on the Dawson Formation — arkosic sandstone and conglomerate shed off the Front Range granite, capped in places by rhyolite. It is the same uranium-bearing granitic parent material found along the Palmer Divide, and it is permeable enough for soil gas to move readily toward foundations.
The housing here
Douglas County builds big and builds deep. The Meadows, Founders Village, Plum Creek, Crystal Valley and the Castle Pines area are dominated by large homes with full, often nine-foot, basements. A deeper basement means more foundation surface in direct contact with soil, and more of the living space sitting below grade — both of which push readings up. Sump pits are near-universal in this inventory, and an unsealed sump pit is effectively an open hole into the sub-slab. Sealing it is often part of the mitigation rather than an optional extra.
What we see locally
A large share of Douglas County basements are finished as full living space — media rooms, guest suites, home offices, home gyms. That is the whole radon problem in one sentence: the highest-concentration part of the house is also where people now spend hours a day. If you have finished or are about to finish a Castle Rock basement, that is the moment testing matters most.
What we do in Castle Rock
Neighborhoods and nearby areas we cover
- The Meadows
- Founders Village
- Plum Creek
- Crystal Valley Ranch
- Castle Pines
- Metzler Ranch
- Sapphire Pointe
- Terrain
ZIP codes served in Castle Rock: 80104, 80108, 80109.
Simple, Fast, Professional Radon Service
A clear, low-stress process from your first call to a verified, working system.
- 1
Schedule a free consultation
Call or request a free consultation online. We'll set a time that works for you.
- 2
Inspect the property
We look at your foundation, basement, or building to understand how radon enters.
- 3
Test or design the system
We test your level and, if needed, plan a system suited to your property.
- 4
Install the system
Our work focuses on safe routing, tidy finishes, and a quiet, reliable system.
- 5
Verify results & explain care
We confirm the system is working and walk you through simple ongoing maintenance.
What Castle Rock customers say
Reviews left by real customers on Google.
Amazing super professionals . Definitely recommend to you guys !
I had a very good experience with AAmerican Radon Solution LLC. Scheduling the radon test was quick and easy, and the technician arrived right on time. They were extremely professional, polite, and respectful of my home. The process was clearly explained, and I received the detailed results super fast. I highly recommend their services to anyone looking for reliable radon testing!
Good prices and very clean and friendly
Excellent! Quality service. Contractor showed up on time and he was really professional. He comunicate all the requirements to us for a proper test. For me, who did this type ot tests countless times I was looking to see if he mentions all the requirements, and he did. This is the first time we are using AAmerican Radon Solution LLC and im very satisfied. I do recommend AAmerican Radon for their services.
Very kind explanation excellent work
Radon questions from Castle Rock homeowners
Specific answers for Douglas County, not general radon advice.