Colorado radon mitigation
Radon mitigation in Colorado
Nearly half of Colorado homes test at or above the EPA action level. A radon mitigation system fixes that — reliably, usually in a single afternoon. Here’s how it works, what it costs, and how to get a free quote from an NRPP-certified Colorado team.
Get a free quoteWhat radon mitigation actually is
Radon is a radioactive gas that seeps up from the soil and collects indoors. Mitigation doesn’t seal it out — it gives the gas an easier path to somewhere harmless. The standard approach, sub-slab depressurization, uses a quiet inline fan to pull air from beneath your foundation and vent it above the roofline, before it can enter the home. The EPA calls it “the most common and usually the most reliable radon reduction method.”
A properly installed system reduces indoor radon by up to 99%, typically to well below the EPA action level of 4 pCi/L. Most installs take 4–6 hours, and a reputable Colorado mitigator includes a post-install re-test to confirm the drop.
Colorado law requires radon mitigators to be NRPP- or AARST-certified and licensed by the state. Colorado Radon Company is both.
The systems we install
Most Colorado homes need the standard system, but the right approach depends on your foundation. The four below cover nearly every case.
Sub-slab depressurization
The standard system for homes on a slab or with a basement — the EPA's most common and reliable method. ~70% of installs.
Learn more →Crawlspace mitigation
Sealed vapor-barrier (sub-membrane) depressurization for homes over a crawlspace, where there's no slab to draw from.
Learn more →Multiple-foundation systems
Homes with a basement plus a crawlspace or addition often need more than one suction point — or a second system entirely.
Learn more →System repairs & upgrades
Fan replacements, re-routing, and fixing underperforming or non-compliant existing systems so levels actually drop.
Learn more →What it costs
A standard sub-slab depressurization system in Colorado runs about $1,499 installed — that covers roughly 70% of jobs. Crawlspace systems run more ($2,000–$5,000), and minor repairs to an existing system start around $499. Your exact number depends on your foundation, access, and starting radon level.
For the full breakdown — what moves the price up or down, by county — see our guide to radon mitigation cost in Colorado.
Not sure if you need it? Test first.
You only need mitigation if your home tests at or above 4 pCi/L — and across 237,408 Colorado tests in the CDPHE dataset, 46.4% did. See the county-level data, or get on the free test-kit waitlist to find out where your home stands before you commit to a system.
Free quote · NRPP-certified
Get a free radon mitigation quote.
We're NRPP-certified and Colorado state-licensed, serving the Denver metro and Front Range. Tell us about your home and we'll get you an exact quote within 24 hours.
- 24-hour quote turnaround
- Installed in 4–6 hours
- Post-install re-test included
- NRPP / AARST certified
Or call us at (866) 398-9858 — same-day response during business hours.