How Much Does Radon Testing Cost in Denver, CO? [2026 Data]

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Radon testing in Denver, CO, costs $492 on average, and ranges from $177 to $807. Your final price depends on the square footage of your home, the specific testing method used, and the layout of your foundation. Before scheduling your radon testing, understanding these local costs helps you plan an accurate budget and take the right steps to keep your household safe.

Radon Testing Cost Factors

When hiring a radon remediation professional in Denver, CO, several variables determine your final bill. The size of your property, the testing method used, and the specific materials required all play a role in shaping the total cost.

Type of Radon Testing

The specific method you select to measure radon levels directly impacts the price. In Denver, CO, homeowners choose between simple short-term kits and more advanced digital monitors to check their indoor air quality. With the snowy, variable climate keeping windows closed during the winter, testing during colder months provides a highly accurate picture of exposure. A basic DIY short-term kit runs from $15 to $45 per test, offering a quick snapshot of radon levels. For official documentation, hiring a certified tester for a professional assessment costs between $160 to $745 per project.

Size

The square footage of your property dictates how many testing devices are necessary to ensure accurate readings. Larger homes in Denver, CO, require additional kits to cover multiple levels, basements, and crawl spaces. Testing a small home of around 1,200 square feet costs between $160 to $320 per project. For a large home exceeding 4,000 square feet, the price increases to $530 to $745 per project due to the extra equipment required.

Frequency

Regular monitoring is essential for maintaining safe indoor air, and the frequency of these checks influences your long-term expenses. Homeowners in Denver, CO, benefit from testing every two to five years to catch any fluctuations. Following severe weather events like blizzards or flash floods that cause foundational shifts, retesting is highly recommended. If you recently paid the radon mitigation cost, follow-up testing confirms the system works correctly. While frequent testing adds up, the overall average of $492 per project is a necessary investment for household safety.

Materials

The underlying technology and physical components of the test kit determine a portion of the overall price. In Denver, CO, testing materials range from disposable charcoal canisters to reusable electronic devices. A standard charcoal canister costs $15 to $35 per kit and requires mailing to a lab for analysis. A digital monitor costs $110 to $265 per unit and provides continuous, real-time readings without ongoing lab fees.

Labor

Hiring a certified professional involves labor fees that cover equipment setup, sample collection, and detailed reporting. In Denver, CO, labor rates vary based on the complexity of the property and the tester's expertise. Many homeowners combine this service with a standard home inspection or comprehensive indoor air quality testing to maximize the value of the labor fee, which helps save on overall home inspection costs. When factoring in professional labor, the total price for testing falls between $177 and $807 per project.

Tipping

Tipping is not a standard requirement for environmental testing services. When a professional in Denver, CO, completes your assessment, the quoted price covers all necessary labor and materials. Leaving a positive review or referring the company to neighbors serves as the best way to show appreciation for excellent service.

How Often Should You Test for Radon?

Regular testing ensures your living environment remains safe from harmful gas accumulation. Experts recommend testing your home in Denver, CO, every two to five years. Testing during the winter is ideal, as the snowy, cold weather keeps doors and windows shut, yielding highly accurate readings. If you recently completed an HVAC inspection or major renovation, immediate retesting is necessary to confirm that structural changes have not altered gas levels.

Cost of Common Radon Testing Add-Ons

Certain situations require supplementary services that increase your final bill. In Denver, CO, expedited lab results for mailed-in kits add extra fees to the baseline price. If elevated levels are detected, you will need to install a proper ventilation system to mitigate the risk. Continuous monitoring devices also represent an additional upfront expense but provide long-term peace of mind without repeated testing fees.

DIY Radon Testing vs. Hiring a Pro

Choosing between a store-bought kit and a certified professional depends on your budget and the required accuracy. In Denver, CO, DIY kits offer a budget-friendly way to check your home, costing between $15 to $110 per project. However, hiring a professional guarantees proper placement, precise calibration, and official documentation for real estate transactions. Professional testing services range from $160 to $745 per project, ensuring complete compliance and accurate results.

Tips to Reduce Radon Testing Costs

Managing your household budget requires strategic planning when scheduling environmental assessments. Homeowners in Denver, CO, utilize several methods to lower their overall expenses.

• Purchase test kits in bulk directly from manufacturers to reduce the per-unit price.

• Check with local health departments for subsidized or free testing kits.

• Schedule professional testing during the off-peak summer months when demand is lower.

• Combine radon testing with a standard home inspection to save on professional service fees.

• Retest only as recommended to avoid paying for unnecessary frequent checks.

Radon Testing Pro Costs

Hiring a certified professional in Denver, CO, ensures your home is safe from dangerous gas accumulation. While many local experts charge a flat fee for their assessment and reporting, others bill an hourly rate. You can expect to pay between $33 to $82 per hour for specialized labor, which accounts for the city’s 9.15% sales tax on testing materials. Complex layouts or multi-level properties in Denver, CO, often require additional time, increasing your total project price.

Why You Should Hire a Radon Testing Professional

Protect your health and save time by hiring a radon testing pro in Denver, CO. A local expert provides excellent value by ensuring your home remains safe from invisible hazards.

• Specialists understand the specific soil compositions common in Denver, CO properties.

• Experts use commercial-grade continuous monitors to detect precise gas fluctuations.

• Professionals follow strict EPA protocols to guarantee reliable testing conditions.

• Inspectors deliver official reports required for real estate transactions and mitigation planning.

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’ve surveyed thousands of 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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