Radon Mitigation in Colorado Springs
The standard fix is sub-slab depressurization: a PVC vent pipe and inline fan that draws radon from beneath your foundation and exhausts it safely above the roofline. In Colorado Springs it typically costs $800–$2,000, installs in about a day, and reliably reduces indoor levels to 2 pCi/L or below.
Price ranges reflect the Colorado Springs market as of 2026 — actual figures vary by home and contractor. Confirm with on-site quotes.
Radon enters through the same gaps every house has — foundation cracks, the slab-to-wall joint, sump pits, and crawl spaces. You can't seal your way out of the problem, but you can reverse the pressure: a mitigation fan creates suction under the slab so radon is captured and vented outside before it ever reaches your living space.
How a sub-slab depressurization system works
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Suction point
The installer cores a small hole through the basement slab (or installs a collection point in the crawl space) and excavates a small pit beneath it to create airflow.
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Vent pipe
PVC pipe runs from the suction point up through the house — often inside a garage or closet chase — and terminates above the roofline, away from windows.
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Inline fan
A quiet, continuously running fan (about the energy draw of a 60-watt bulb) creates negative pressure under the slab, reversing the flow that was pushing radon into the home.
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Sealing + verification
Major entry points are sealed as part of the job — not as the fix, but to improve the system's efficiency. A manometer on the pipe shows the system is running, and a post-installation test confirms your new level.
What should a mitigation quote include?
- Written reduction guarantee — levels brought below 4.0 pCi/L (Colorado health officials recommend requiring this in writing)
- Minimum 5-year warranty on the fan and workmanship
- Post-installation testing to verify the result — not just a visual inspection
- Licensed professional — Colorado maintains a lookup tool for licensed radon mitigation and measurement contractors
- Exterior-routed or interior-routed piping specified, with the termination above the roofline
- Electrical work for the fan included in the bid (fans need a dedicated circuit or outlet)
Can I install a radon system myself?
Colorado's health department says it's possible if you have strong handyman and electrical skills — but most homeowners hire a licensed professional. Proper suction-point placement, pressure-field testing, and fan sizing determine whether the system actually works. A poorly designed DIY system can look complete while leaving levels elevated, which is worse than knowing you have a problem.
What about crawl spaces?
Homes with crawl spaces use sub-membrane depressurization: a heavy-duty vapor barrier is sealed over the crawl space floor, and the fan draws radon from beneath the membrane. It's the same principle as sub-slab systems, adapted to the foundation type. Crawl space jobs sometimes cost more due to the extra sealing work.
Sealing alone is not mitigation
Colorado's health department is explicit: caulking and sealing cracks cannot keep radon out on its own. Sealant dries out, cracks reopen, and it's impossible to seal every entry point. Sealing is a supporting step within a real mitigation system — never a substitute for one. Be wary of any contractor who proposes sealing as the whole solution.
Get it done right, the first time
Free quotes from local Colorado Springs radon professionals. Written guarantees, confirmed by post-mitigation testing.
Get My Free Quotes or call (719) 555-0147