How Much Does Radon Testing Cost? [2024 Data]
Normal range: $146 - $715
Radon testing should be done by a professional and averages $419. You can DIY some of the testing with an average cost of $146, but it isn’t advised.
The average cost for radon testing ranges from $100 on the low end to $1,200 on the high end. This results in a national average cost of $419. These costs may seem a bit high but considering radon inhalation is the number two cause of lung cancer, it’s a wise investment.
The large range of costs comes down to a few factors like the type of test performed and the level of test required. There are ways to test for radon yourself, but they will never be as accurate as a professionally-administered test. Consider that disclaimer when you’re thinking about testing for radon in your home.
- Average
- $419
- Low end
- $100
- high end
- $1,200
Radon Testing Cost Factors
Types
If you’re wondering how to test for radon, there are two testing methods: DIY or hire a professional to come to your home and perform the test. Radon is a radioactive gas that can originate from things you see everyday—dirt, water, stones, etc. Our bodies are used to radon in low levels, but sometimes it can pool inside a home, which is when it becomes dangerous.
| Type of Test | Accuracy | Average Cost |
|---|---|---|
| Home test kit | Low – medium | $146 |
| Professional testing | High | $715 |
As you can see, performing tests with kits is much more cost-effective, but also less accurate. The exact type of test performed matters as well, as radon can be tested for a period of time lasting from two days to more than one year. The average person won’t know which type of test to use, which is why it’s highly recommended you hire a professional radon testing business near you.
Short-Term Radon Testing
Short-term testing is good for discovering if you have a high level of radon in your home, but it won’t be as reliable as a long-term test. Confirming radon is one thing but having accurate measurements over time is preferable.
If you have a positive result from a short-term kit, that usually means the radon is well above the normal range. However, false negatives are much more common in short-term tests vs. long-term tests. This is why it’s a good idea to hire a pro, because they will know which type of test to use, and where to place it.
Common short-term testing kits are:
Charcoal canisters
Electret ion detector
These types of tests are more affected by environmental factors when compared to long-term tests. Shifts in humidity and temperature can eschew results. A negative result does not mean there are no dangerous levels of radon in your home.
Long-Term Radon Testing
Long-Term results are much more consistent than short-term, which is why most pros prefer—and/or only employ—long-term tests. Professionals need to be accurate, so they will use the best methods available, and for radon testing, that usually means Alpha Track Detection.
Alpha Track Detection measures the alpha particles emitted during the decay of radon gas. This method can also be used for short-term testing but is generally left for longer periods. There is a plastic film inside the test kit that is analyzed after the testing period.
The kits are generally sealed in a way that prevents them from external influences like those that affect short-term tests. They very rarely malfunction, and with a confirmed radon presence, you can get rid of the radon faster.
Continuous Radon Monitors
Continuous radon monitors, or CRMs, are plugged into the wall and measure radon levels. These are convenient for a number of reasons, mainly:
They are small, and either run on batteries or are plugged directly into the wall.
They often have accompanying apps, so you can check whenever in Bluetooth range.
They can be reset and moved to different rooms to test.
They are easy to use and generally don’t require specialized knowledge.
You can track radon fluctuations.
Some CRMs have both short-term and long-term readouts which make for a solid range of results to compare against other testing methods. CRMs are somewhere between the reliable test results of a professional long-term test and a short-term DIY kit.
Water Testing
You can often test water for radon with a CRM, but it’s a better idea to hire a pro or reach out to either The Safe Drinking Water Hotline or the EPA. You can also call your state’s radon office and they would be able to advise you on the best way to go about testing your water.
Radon is much more common in well water than it is in reverse osmosis-filtered city water. There is a much greater chance of your water containing dangerous levels if you live on a farm or pull water from a nearby well. While boiling water does remove radon gas from the liquid itself, it evaporates and remains in the air afterward.
| Testing Methods | Average Cost | Duration |
|---|---|---|
| Short-Term | $100 | 2 – 7 days |
| Long-Term | $1,200 | 90 – 365 days |
| Continuous | $420 | 30 – 365+ days |
| Water | $146 | 7 – 10 days |
Labor
When you hire a professional for testing, their time and expertise is what you’re paying for. Labor costs are included in the cost of testing, but it’s safe to assume you will pay around $70 to $110 an hour. This will include examining your home to determine the best location (or locations) for testing, setting up the equipment, and returning to collect samples and remove equipment.
DIY Radon Testing vs. Hiring a Pro
You can perform radon testing yourself but it isn’t necessarily the best idea. Remember that radon test results are sometimes required when selling property or dealing with insurance, and a DIY result won’t be approved.
There’s also the consideration that in certain states, radon test results are required when building homes. There are commercial applications as well that require licensed results. DIY test results can certainly save you money, but there are very few cases where it makes more sense than hiring a pro. It’s recommended that you only consider DIY testing as a last resort—if, say, your local pro has no immediate availability—remembering that every day you’re exposed to radon is bad for your health.
Tips to Reduce Cost While Radon Testing
Radon testing is something that should be taken seriously, and the cost isn’t so excessive that you should forgo professional help and DIY. One reason to call a pro is that even if you test for radon yourself, and you get a positive result, you likely won’t be able to remove the radon safely.
For almost all positive radon tests, you should call a pro. The only place—other than buying inexpensive and unreliable DIY kits—where you may be able to save money is on labor. Try to work with your radon professional and see if you can help lighten their load in exchange for a decrease in the bill. This can involve digging dirt, moving furniture, or other manual labor.
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.
Want to help us improve our cost data? Send us a recent project quote to costquotes@angi.com. Quotes and personal information will not be shared publicly.
Frequently Asked Questions
Radon is commonly found in the lower areas of your home, especially the basement. This is because the basement is often closest to the material that’s causing the radon level to increase. It’s recommended to check radon levels in the basement periodically or whenever a change is occurring, such as refinishing a basement or having someone move into the basement as their living space.
Radon is present almost everywhere but, like sunlight, the concentration levels and how often you are exposed to it have a large part to play in just how dangerous it is. There are levels of radon that are acceptable inside a house, but above a certain limit, radon becomes a serious radioactive hazard that is a known cause of lung cancer. In fact, radon exposure is the number two leading cause of lung cancer (after smoking).
A radon test has no effect on humans—only the radon in the air does. The test does not redistribute the radon that is already present so yes, it’s safe to be around the testing kit even if it isn’t safe to be in the room itself. The test absorbs and measures the radon, but doesn't absorb enough of it to make the room any safer.
The soil beneath your house is most likely what’s causing an increased level of radon. This is because soil holds radioactivity for a long time and it’s also what most buildings are built on. Another common source of radon is water from a source that hasn’t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.
The short answer is no, air purifiers do not help with radon. While they certainly can improve the air quality of your home, they only clean pollutants from the air. Radon is radioactive, and it isn’t affected by the same filtration systems that handle other airborne particles, like dust and mold. The only thing that works is a radon mitigation system.
You can vent radon out of your house sometimes by simply opening a window, but it won’t remove the source, and will likely rise above recommended levels quickly. A professional will be needed to assess your home, and determine the best strategy for radon removal. Active radon sump pumps and soil depressurization systems are often used to forcefully vent the radon from your home.