Radon mitigation quotes in Aurora, Colorado
Aurora is Colorado’s third-largest city, spreading east from Denver across Arapahoe and Adams counties with housing from postwar neighborhoods near the old core through vast newer subdivision growth toward E-470.
Front Range radon levels are among the nation’s highest. Aurora homeowners hire independent, nationally certified mitigation contractors.
Aurora and Arapahoe County
Aurora routes through our Arapahoe-Douglas territory, which also covers Englewood, Greenwood Village, Centennial-area ZIPs, Parker, and Castle Rock. EPA places Arapahoe County in Zone 1 on its Map of Radon Zones. Colorado does not license radon professionals; look for NRPP or NRSB national certification.
If the result surfaced in a transaction
Aurora’s market spans first-time buyers, military-adjacent relocations, and family moves, all with radon testing as standard practice. Colorado requires sellers to provide a radon warning statement and the state brochure before a sale; nothing requires testing or mitigation, and the remedy is negotiated.
Those duties are set in Colorado, not in Arapahoe County — Colorado radon disclosure rules has the statute and the agency behind it, including what a seller must hand over and what stays negotiable.
The housing you’re mitigating
Older western Aurora brings postwar ranches on block foundations, many with crawl spaces rather than full basements — crawl-space designs use sealed membranes with suction drawn beneath. Newer eastern subdivisions are conventional poured construction with deep basements, sump systems, and frequent passive rough-ins.
Radon results do not stop at a municipal boundary, and neither do the contractors quoting here: the same Arapahoe County soil and the same building era run through Denver, Littleton and Highlands Ranch, which is why a reading in one of them is worth knowing about when you are interpreting yours. For the wider picture, radon across Denver Metro sets out how results vary between communities here, and what a system costs in Denver Metro covers the price drivers before you start collecting numbers.
Nearby coverage
Contractors quoting Aurora typically also serve these Denver Metro communities:
- Denver
- Littleton
- Highlands Ranch
- Englewood
- Parker
- All of Denver Metro →
Go deeper on Denver Metro
Aurora questions, answered straight
Our house sits on a crawl space. Can that be mitigated?
Yes. The standard approach seals a durable membrane over exposed crawl-space soil, seals it at walls and seams, and draws air from beneath it with a fan venting above the roofline. Confirm the quote covers the whole crawl area rather than part of it.
Is a newer eastern-Aurora home less likely to test high?
No. Radon comes from the soil beneath the slab, and Front Range soils produce it regardless of build year while tight construction holds what enters. Many newer homes have passive rough-ins, which makes the fix smaller — not immunity.
What confirms the result rather than just the installation?
Insist the post-mitigation radon test be in the scope of work. Performed under closed-house conditions post-startup, it separates a working design from a running fan.
A neighbour tested at 2.8. Does that tell us anything?
Very little. What drives an indoor result is the ground under your own footprint, the number and size of openings through your slab, and the pressure your house pulls on that soil — all three change from address to address. Aurora homes in the same subdivision phase land on opposite sides of 4 pCi/L often enough that borrowing a neighbour's number is guesswork. Their result is a reason to test your own address, never a substitute for testing it.
Does an evaporative cooler affect a radon test?
It can, which is why measurement protocol treats it the way it treats a whole-house fan: it stays off during closed-house conditions and for the 12 hours beforehand. A swamp cooler moves a large volume of outdoor air through the house and will dilute an indoor radon reading while it runs, producing a number that describes the cooler rather than the house. On an Aurora test, note in writing whether one is installed and whether it was operating.
Ready for real Aurora numbers?
Two minutes, and free. Your postcode is checked against coverage before you are asked for contact details, and the confirmation tells you exactly what happened to the request.
Sources
- U.S. EPA — Radon
- U.S. EPA — A Citizen’s Guide to Radon
- U.S. EPA — Consumer’s Guide to Radon Reduction
- U.S. EPA — EPA Map of Radon Zones