If you are researching radon testing cost, you may be wondering how much you should budget to test your Colorado home. The answer depends on the type of test, whether you choose a do-it-yourself kit or a professional measurement, and why you are testing in the first place.
In Colorado, radon testing is especially important. The Colorado Department of Public Health and Environment reports that approximately half of Colorado homes have radon levels above the U.S. Environmental Protection Agency’s action level of 4.0 pCi/L.
The good news is that testing does not have to be complicated or prohibitively expensive. There are low-cost and even free testing options available, while professional testing provides additional expertise and can be particularly valuable during a real estate transaction.
If you are looking for affordable radon testing, understanding the different options can help you choose the right approach for your home.
What Is Radon Testing?
Radon testing measures the concentration of radon gas inside a building. Radon is a naturally occurring radioactive gas produced as uranium in soil and rock breaks down. It can enter homes through cracks, joints, crawl spaces, sump openings, and other pathways between the building and the ground.
Because radon is colorless and odorless, there is no way to determine whether a home has elevated levels simply by looking at it. The CDC states that testing is the only way to know whether radon levels are high inside your home.
A radon test typically involves placing a measurement device in the lowest level of the home that is regularly used or could reasonably become a living area. Depending on the test, the device remains in place for anywhere from a few days to several months.
The result is generally reported in picocuries per liter, or pCi/L.
How Much Does Radon Testing Cost?
There is no single nationwide price for radon testing because costs vary based on the testing method, location, equipment, and provider.
For Colorado homeowners, the available options range from inexpensive do-it-yourself kits to professional testing.
The Colorado Department of Public Health and Environment states that do-it-yourself radon test kits are generally available for about $10 to $50. Homeowners can also hire a radon measurement professional, with professional testing costing around $150, according to the department’s radon FAQ.
Some public health programs also provide free or discounted test kits. CDPHE currently offers free kits to Colorado households while supplies last, with a limit of one per household per year.
Typical Colorado Radon Testing Costs
| Testing Option | Typical Cost | Best For |
| Free public health test kit | $0 when available | Basic residential testing |
| DIY short term test | About $10 to $50 | Homeowners seeking an affordable option |
| Professional radon testing | Around $150 | Buyers, sellers, and homeowners wanting professional measurement |
| Long term testing | Varies | Understanding average radon levels over time |
These are general figures rather than guaranteed prices. The actual radon test pricing from a local provider may vary based on the property, testing method, location, and service included.
DIY Radon Testing vs. Professional Testing
One of the biggest factors affecting radon testing cost is whether you test the home yourself or hire a professional.
Both options can provide useful information, but they serve different needs.
DIY Radon Testing
DIY kits are an attractive option for homeowners who want affordable radon testing.
According to CDPHE, short term DIY test kits are available for approximately $10 to $50.
Short term tests generally take between 48 and 120 hours in Colorado, although the exact testing period depends on the device and manufacturer’s instructions. The home should be maintained under closed house conditions during the required period.
A DIY test may be appropriate when:
- You want an initial indication of your home’s radon level
- Your home has never been tested
- You want an inexpensive screening option
- You are comfortable following testing instructions carefully
- You are not currently involved in a real estate transaction
The most important thing is to follow the test manufacturer’s instructions precisely. Incorrect placement, improper timing, or failure to maintain the required conditions can affect the validity of the results.
Professional Radon Testing
Professional testing costs more than a basic DIY kit, but it can provide additional confidence and convenience.
CDPHE says hiring a professional radon measurement professional costs around $150 and notes that professional testing is a good option for real estate transactions because it helps ensure that the test is conducted correctly and the results are valid.
Professional testing may be particularly useful when:
- You are buying a home
- You are selling a home
- A previous test produced questionable results
- You need documented testing
- You want an experienced professional to handle the process
- You are concerned about elevated radon levels
For a real estate transaction, CDPHE recommends hiring a professional radon measurement professional to conduct a short term measurement using a professional grade continuous radon monitor or another approved device.
What Is the Difference Between Short Term and Long Term Testing?
The length of time a test runs can also influence the testing process and potentially the overall cost.
Short Term Radon Testing
Short-term tests can take from two days to 90 days, depending on the testing device. They are commonly used when homeowners need relatively quick results.
For Colorado DIY testing, CDPHE states that short-term tests generally take 48 to 120 hours.
Short-term testing can be useful when:
- You want to screen your home quickly
- You are preparing for a home sale
- You have never tested before
- You need initial information about your radon levels
Long Term Radon Testing
Long-term tests run for more than 90 days and can provide a better representation of average indoor radon exposure.
The CDC explains that long-term tests measure radon for more than 90 days and provide information about the home’s year-round average level.
Because radon levels can fluctuate with weather, temperature, pressure, ventilation, and other conditions, long-term testing can provide a more comprehensive picture of what is happening inside the home.
For homeowners who are not under a tight deadline, long term testing may be worth considering when they want a better understanding of typical radon exposure.
Why Is Radon Testing Important in Colorado?
Colorado has a significant radon concern.
CDPHE reports that approximately half of Colorado homes have radon levels above the EPA action level of 4.0 pCi/L.
The state agency also notes that elevated radon occurs throughout Colorado and encourages residents to test their homes rather than making assumptions based on location or the experience of neighboring properties.
Two houses next door to each other can have different radon levels because of differences in foundation construction, soil conditions, ventilation, and other factors.
That is why the most reliable way to determine whether your home needs attention is to test it.
What Radon Levels Mean
Knowing your test result is just as important as completing the test.
The EPA recommends taking action to fix a home when radon levels are at or above 4 pCi/L. The agency also recommends considering action when levels fall between 2 and 4 pCi/L because there is no known completely safe level of radon exposure.
The CDC recommends having a radon reduction system installed when radon levels are at or above 4 pCi/L.
Colorado provides additional guidance for interpreting test results. CDPHE describes results below 2 pCi/L as lower, results between 2 and 3.9 pCi/L as a range where additional long term testing may be appropriate, and results at or above 4 pCi/L as above the EPA action level.
If your result is elevated, testing is only the first step. The next step may be professional evaluation and radon mitigation.
What Can Affect Radon Test Pricing?
When comparing local radon services, homeowners should look beyond the advertised price.
Several factors can affect what you pay for testing.
Testing Method
A simple charcoal or other DIY test kit will generally cost less than professional measurement using specialized equipment.
Testing Duration
Short-term and long-term tests have different purposes and may have different costs.
Property Location
Some local providers may charge differently depending on travel distance and service area.
Professional Documentation
If testing is being completed for a real estate transaction, you may want professional documentation and equipment rather than relying on a basic DIY kit.
Additional Services
Some companies may offer testing as part of a broader package that includes consultation, mitigation recommendations, post-mitigation testing, or other services.
When comparing quotes, make sure you understand exactly what is included rather than automatically choosing the cheapest option.
How to Find Affordable Radon Testing
Affordable radon testing does not necessarily mean choosing the lowest priced service available.
A better approach is to compare the value you receive for the price.
Start by checking whether your state or local public health agency offers free or discounted test kits. Colorado currently offers free test kits through CDPHE while supplies last.
The EPA also explains that free test kits may be available through local or county health departments and state radon programs.
If you decide to hire a professional, compare professional providers and ask what is included in the quoted price.
Consider asking:
- What type of test will be used?
- How long will the test run?
- Is the testing equipment professionally calibrated?
- Will I receive a written report?
- Is laboratory analysis included?
- Are there additional travel charges?
- Is post mitigation testing available?
- Is the provider properly licensed for Colorado?
A slightly higher upfront cost may be worthwhile if it provides better documentation, professional oversight, and confidence in the results.
When Should You Test Your Home for Radon?
The best time to test is when you need reliable information about your home’s radon level.
The CDC recommends testing if your home has never been tested or if the radon level is unknown. It also recommends testing when preparing to buy or sell a home and before and after renovations that could affect radon entry or living patterns.
Testing is particularly important if you are:
- Buying a Colorado home
- Selling a Colorado home
- Moving into a new property
- Finishing a basement
- Converting a lower level into a bedroom or office
- Planning major foundation renovations
- Unsure whether a previous radon test is still representative
- Concerned about a previous elevated result
If your home already has a mitigation system, testing remains important. CDPHE recommends testing homes even when a mitigation system is installed.
Does Radon Testing Include Mitigation?
No. Radon testing and mitigation are separate services.
Testing measures radon levels. Mitigation reduces elevated levels.
If your test result is at or above 4 pCi/L, you may need a radon mitigation system. CDPHE recommends finding a professional radon mitigation professional and getting multiple bids before proceeding with the work.
It is useful to understand this distinction when requesting quotes from local radon services. A testing quote generally covers measurement, while mitigation involves designing and installing a system to reduce radon.
What Does Radon Mitigation Cost in Colorado?
Although this article focuses on radon testing cost, homeowners often ask about mitigation immediately after receiving an elevated result.
The cost of mitigation is separate from the cost of testing and varies significantly depending on the home.
CDPHE states that traditional radon mitigation systems installed in existing single-family homes generally cost approximately $1,300 to $3,000, although each home is different.
Factors such as foundation design, crawl spaces, the number of suction points, pipe routing, electrical requirements, and system complexity can affect the final price.
Testing first allows you to determine whether mitigation is actually necessary.
Why Choose Aspen Radon for Local Radon Services?
When you are searching for local radon services, working with a radon company familiar with Colorado homes can make the process easier.
Aspen Radon provides radon services for homeowners who want professional guidance about testing and mitigation. Whether you are testing for the first time, preparing for a real estate transaction, or investigating a previous elevated result, having a clear understanding of your options can help you make an informed decision.
The goal is not simply to purchase a test. It is to understand what the results mean and what steps, if any, should follow.
Frequently Asked Questions
How much does a radon test cost in Colorado?
DIY test kits in Colorado are generally available for about $10 to $50. CDPHE’s radon FAQ states that professional testing costs around $150. Actual pricing can vary depending on the provider and testing circumstances.
Can I get a free radon test in Colorado?
Yes. CDPHE offers free radon test kits to Colorado households while supplies last, with one kit available per household per year.
Is a professional radon test worth the cost?
Professional testing can be especially valuable for real estate transactions or when you want professional handling and documentation. CDPHE specifically recommends professional measurement for real estate transactions.
Are cheap radon test kits reliable?
DIY kits can provide useful results when they are approved and used correctly. Following the manufacturer’s instructions is essential. If results are elevated, additional testing or professional evaluation may be appropriate.
How long does a radon test take?
Short-term tests can take between two and 90 days depending on the device. Long-term tests run for more than 90 days. Colorado’s CDPHE states that typical short-term DIY tests take 48 to 120 hours.
What happens if my radon test is 4 pCi/L or higher?
A result of 4 pCi/L or higher is above the EPA action level. The next step is generally to confirm the result as appropriate and consider installing a radon reduction system.
Should I test my home if my neighbors have low radon levels?
Yes. Radon levels can vary from one property to another, even within the same neighborhood. Testing your own home is the only way to determine its radon level.
Do I need to test again after radon mitigation?
Yes. Post-mitigation testing helps determine whether the system successfully reduced radon levels. Continued periodic testing is also recommended.
Get Reliable Radon Testing From Aspen Radon
Knowing your home’s radon level does not have to be expensive or complicated. Whether you choose a DIY kit or professional testing, the important thing is to take the first step and get measurable information.
For Colorado homeowners, Aspen Radon can help you understand your options for testing and determine what to do if elevated radon is found.
If you are looking for professional radon testing, affordable radon testing, or dependable local radon services, contact Aspen Radon to discuss your property and testing needs.
U.S. Government Radon Resources
For additional information about radon testing, homeowners can consult these official government resources:
- U.S. Environmental Protection Agency: How Do I Get a Radon Test Kit? Are They Free?
- U.S. Environmental Protection Agency: Radionuclide Basics: Radon
- Centers for Disease Control and Prevention: Testing for Radon in Your Home
- Colorado Department of Public Health and Environment: Testing and Mitigating Your Home for Radon
- Colorado Department of Public Health and Environment: Radon FAQ
These resources can help homeowners learn more about testing methods, radon levels, professional services, and steps to take when elevated radon is found.