How Much Does a Radon Mitigation System Cost in Denver? [2026 Data]

In Denver, radon mitigation isn’t a maybe-someday project because elevated levels are common here, and it’s a health risk you can’t see or smell. With average installation costs around $899, most homeowners pay between $756 and $1,064, depending on the home and its quirks.

Between mile-high pressure swings, radon-prone Front Range soils, and everything from 1890s Victorians to new Highlands townhomes, no two installs look the same, which is why local installation experience matters more than the equipment alone.

Radon Mitigation Cost Factors 

Radon mitigation in Denver, CO, involves balancing performance with the level of disruption that your home and your curb appeal can handle. Costs cover diagnostic testing, materials like PVC piping and fans, labor, electrical work, and compliance with Colorado regulations.

Cost by Method

The cost of a radon mitigation system depends on the chosen approach, which might be sealing the basement, depressurization, or lower-level pressurization. The depressurization method happens in one of two types: active suction (soil depressurization) or passive depressurization.

Here’s what to expect for pricing by radon mitigation method: 

Cost by Home Size 

Home size affects the cost mainly because larger footprints require longer pipe runs, more complex routing, or higher-capacity fans, especially in homes with basements, which are common in Denver.

Radon Mitigation Pro Costs

In Mile High City, a big portion of what you’re paying for radon mitigation isn’t the pipe or the fan—it’s the professional expertise behind the install. Remember, radon testing pros in Denver know how to work with Front Range soil, mile-high pressure changes, and homes that weren’t all built in the same century, which ensures the system performs as it should. 

Local Labor Costs

Labor costs in Denver are lower than in major coastal cities but higher than in smaller Midwest markets. Also, radon mitigation is priced as a flat project rather than by the hour. Costs often increase when installers work around finished basements, tight crawl spaces, longer vent runs, or winter conditions that slow exterior work.

Permits

Because mitigation costs can involve drilling through the foundation and adding electrical for the system, permits are often part of the deal in Denver. Most licensed contractors pull them for you, so you won’t have to spend your afternoon decoding city paperwork. Fees run $25 to $150, depending on the scope of work and whether any electrical updates are involved.

Taxes

Colorado contractors are treated as the buyer of the materials, so they pay the sales tax and then fold that cost into the final invoice. In other words, it won’t show up as its own tidy line item. And in Denver, where the combined tax rate can reach up to 9.15%, that built-in tax can nudge the total higher than you’d expect.

Licensing and Certification Requirements

Radon mitigation in Colorado is tightly regulated. Any professional working on a system must be licensed through the Colorado Department of Regulatory Agencies, carry certification from either the National Radon Proficiency Program or the National Radon Safety Board, and maintain at least $500,000 in professional liability insurance. 

Additional Pros to Consider Hiring 

If the system needs a new outlet, a dedicated circuit, or any wiring cleanup for the fan, an electrician may get involved, with many electrical projects averaging $349. 

Older homes or houses with foundation issues can expect costs from a foundation specialist to add up quickly. Even “small” repairs like crack fixes can run $250 to $800 on average.  

And when the goal is a clean-looking install in a finished basement, a basement finisher may be needed to open, route, and patch walls or ceilings. Homeowners can expect topay $7 to $23 per square foot for basement finishing, depending on the scope of work.

Does a Radon Mitigation System Increase Home Value?

Radon mitigation can make a home easier to sell in the Mile High City because buyers here take radon test results seriously. A working system signals a safer home, keeps basement space truly livable, and offers modern performance that’s quiet and efficient.

When the install is done cleanly, it also protects the look of finished basements and exterior lines, which matters in a market where every showing counts. It may not wow you like a kitchen upgrade, but it can help you avoid price cuts due to elevated radon levels.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

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