Bottom line: Most Denver homeowners pay $1,400–$1,800 for a standard radon mitigation system. Homes with crawlspaces or multiple suction points run $1,800–$3,000. Post-install re-test and written guarantee are included.
The Short Answer
Here's what you'll actually pay for radon mitigation in Denver, based on current market rates:
| Scenario | Typical Cost |
|---|---|
| Standard sub-slab, single suction point | $1,400–$1,800 |
| Sub-slab, 2+ suction points | $1,800–$2,400 |
| Crawlspace membrane system | $2,000–$3,000 |
| Garage or exterior routing upgrade | +$300–$500 |
| Whisper-quiet fan upgrade | +$200 |
| Post-install re-test | Included |
| Independent lab verification | Included |
Why Most Companies Won't Post Pricing
It's worth asking: if the price ranges are this predictable, why do most Denver radon companies refuse to publish them?
The honest answer is that in-home sales models depend on price flexibility. When a technician visits your home to "assess," the quote reflects what they think you'll pay — not just what the job costs. Published pricing eliminates that dynamic. It also makes comparison shopping easier, which isn't in the company's interest if they're charging above-market rates.
We publish ours because we think transparency is a competitive advantage. If our prices are fair — and we believe they are — there's no reason to hide them.
What Makes Your Price Vary
Within the ranges above, your exact price depends on a few factors:
Foundation Type
The most important variable. Full basement with poured concrete slab is the standard scenario — single suction point, standard pricing. Crawlspace foundations require a vapor barrier membrane system, which involves more materials and labor. Combination foundations (partial basement, partial crawlspace) may require both approaches.
Number of Suction Points
Most Denver homes with standard gravel sub-bases need one suction point. Homes with multiple isolated sections under the slab, or tight soil with poor sub-slab communication, may need two. We test for sub-slab communication before quoting — not by guessing.
Exhaust Routing Distance
Standard routing runs the exhaust pipe from the basement suction point through the band joist and up the exterior wall. Longer runs, interior routing through finished walls, or attic routing all add time and materials.
Existing Rough-In
Some homes — particularly those built after 2008 in Colorado — have a passive radon rough-in already installed. This is a capped PVC pipe from the sub-slab to the attic or exterior. If yours has one, the installation is significantly simpler and usually costs less.
What's Always Included
Regardless of system type, every install from 5280 Radon includes:
- Sub-slab or sub-membrane ASD system
- White aluminum exhaust pipe (not PVC, which yellows)
- Fan with manometer and system warning label
- Post-install re-test (independent, not self-reported)
- Written guarantee: below 2.0 pCi/L or rework free
- 30-year fan warranty documentation
- Closing-ready paperwork if applicable
Radon Mitigation for Real Estate Closings
If radon was flagged in a home inspection, timing matters. The typical scenario: the inspection comes back elevated, the buyer requests mitigation as a condition of closing, and suddenly there's a 10-day window to get it done.
We guarantee installation within 48 business hours for active real estate transactions. This includes the installation, independent re-test, and delivery of closing documentation. The re-test adds 24–48 hours for a short-term charcoal test, so a Monday installation typically produces closing-ready documentation by Wednesday or Thursday.
See our Save Your Deal page for the closing-specific workflow.
DIY vs. Professional Mitigation
Radon mitigation kits exist. They're legal, and some homeowners install them successfully. But there are real reasons most choose a professional:
- Suction point selection matters. A poorly placed suction point can result in a system that runs but doesn't adequately reduce levels. Professionals test for sub-slab communication before drilling.
- Fan sizing matters. Over- or under-sized fans waste electricity and may not achieve adequate pressure differentials.
- Real estate transactions require NRPP-certified work. If you're selling a home, a DIY mitigation system won't satisfy most lender requirements. You'll need certified documentation.
- Guarantees. A professional install comes with a written guarantee. DIY doesn't.
Getting a Quote
We respond to quote requests within 2 business hours with an exact price — not a range. Submit a request here or call (719) 414-9414.
For the full pricing breakdown including add-on costs, see our published pricing page.
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