If you have just discovered elevated radon levels in your Denver home, your first question is probably a simple one: what is this going to cost me? It is a fair question, and the honest answer is that most Denver homeowners pay somewhere between $1,200 and $2,500 for a professionally installed radon mitigation system in 2026. The wide range comes down to your foundation type, the layout of your home, and how the system needs to be routed.
The Typical Price Range in 2026
For a standard single-family home with a basement or slab foundation, a sub-slab depressurization system, which is the most common type, usually lands in the $1,200 to $1,800 range. Homes with crawlspaces, multiple foundation types, or difficult routing can push toward $2,000 to $2,500 because they require more material, labor, and sealing work.
- Basic sub-slab system (basement or slab): $1,200 – $1,800
- Crawlspace with vapor barrier and membrane suction: $1,800 – $2,500
- Homes with multiple foundation types or complex routing: $2,200 – $3,000+
- Post-mitigation radon test to confirm results: often included
What Actually Drives the Price
No two homes are identical, and the price you are quoted reflects the specific conditions of your property. The biggest factors are your foundation type, the number of suction points needed, the distance the system has to travel to vent above the roofline, and whether your crawlspace needs a sealed vapor barrier installed.
- Foundation type: slab, basement, and crawlspace each require different approaches.
- Suction points: larger or compartmentalized foundations may need more than one.
- Routing and aesthetics: interior routing through the attic costs more but looks cleaner than exterior piping.
- Fan size: higher radon levels or larger homes may need a more powerful fan.
A mitigation system is a one-time investment that protects your family for decades. Cutting corners to save a few hundred dollars rarely pays off.
Why Denver Homes Are Especially at Risk
Colorado sits in EPA Radon Zone 1, the highest-risk category in the country. The uranium-rich soil along the Front Range produces radon gas that seeps up through foundation cracks and openings. That is why radon testing is so common in Denver real estate transactions, and why a properly sized mitigation system is worth every dollar.
How to Avoid Overpaying
The best way to get a fair price is to get an in-person estimate rather than a phone quote. A good contractor will inspect your foundation, identify the right number of suction points, and explain exactly what the system will look like. Be wary of quotes that seem unusually low, as they often skip the post-installation test or use undersized fans that fail to bring levels below the EPA action level of 4.0 pCi/L.
At Custom Radon, every install includes a free in-person estimate, a guarantee of levels below 4.0 pCi/L, and a lifetime warranty. If it is not right the first time, we come back and fix it at no cost. Schedule your free estimate today and get a complimentary test kit to see exactly where your home stands.
Worried About Radon in Your Home?
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