Radon Test Cost: Pricing for DIY Kits and Consumer Monitors
The radon test cost question usually comes from a homeowner trying to figure out which kit to buy, what the lab fee includes, and whether the cheaper option is good enough. The honest answer is that DIY radon testing is genuinely affordable — most short-term mail-in kits cost between $15 and $40 including the lab analysis fee — and the cheaper options are usually accurate enough for personal-information testing. The cost picture gets more interesting when you compare DIY kits against consumer continuous radon monitors (Airthings, Corentium) and against professional testing. This guide focuses on the test kit and consumer monitor side of the cost question and summarizes EPA, CDPHE, and AARST guidance current as of 2026 along with public-domain pricing for major kit brands. Consult your physician for any health symptoms and a certified mitigation professional for elevated-result decisions.
What “radon test cost” usually means
The phrase “radon test cost” is used two different ways. Sometimes it means the price of a one-time test kit (a charcoal canister or alpha-track detector you buy once and ship to a lab). Sometimes it means the cost of a consumer continuous radon monitor (a device you buy once that runs continuously). The first is a per-test cost. The second is a one-time hardware purchase that produces unlimited tests.
This guide focuses on both flavors of DIY kit cost. For professional radon-testing pricing (where a certified measurement professional places a calibrated CRM during a real-estate transaction), see the related radon testing cost overview for the professional pricing breakdown.
The overview of radon testing in Colorado for Front Range homeowners covers the broader testing landscape.
Short-term DIY mail-in kit pricing
Short-term DIY kits use either activated charcoal canisters or electret ion chambers to measure radon over a 2 to 7 day deployment, after which the kit is mailed to a NRPP-listed lab for analysis. Typical 2026 pricing:
- AccuStar charcoal kit (single test): $20 to $30 including pre-paid shipping and lab fee. The most widely used kit in the United States.
- RadonAway charcoal kit: $20 to $35 including lab fee. Comparable accuracy to AccuStar.
- Pro-Lab short-term radon kit: $25 to $40. Available at major home-improvement retailers.
- First Alert radon test: $20 to $30 at major retailers.
- State-discounted kits: CDPHE periodically offers Colorado homeowners radon kits at reduced prices ($10 to $15) through county health departments.
The kit cost typically includes the canister or detector, a postage-paid envelope or box, and the lab analysis fee. Results are usually emailed within 5 to 10 business days of the lab receiving the sample.
Long-term DIY mail-in kit pricing
Long-term alpha-track detectors run for 90 days to 1 year and capture seasonal radon variation. They are particularly useful for homes where short-term tests have produced inconsistent results or where seasonal averaging matters for mitigation decisions. Typical 2026 pricing:
- AccuStar alpha-track detector: $25 to $40 including lab fee
- RadonAway alpha-track: $25 to $45 including lab fee
- Landauer Radtrak: $30 to $50 — used by some professional providers and available to homeowners
- State-discounted long-term kits: Sometimes available through CDPHE and county programs at $15 to $25
Long-term tests are slower but provide a more representative annual-average concentration than a single 48-hour test.
Consumer continuous radon monitor pricing
Consumer continuous radon monitors are electronic devices that measure radon in real-time and display rolling averages on a screen or app. Unlike mail-in kits, they are a one-time hardware purchase with no per-test fee. Typical 2026 pricing:
- Corentium Home (Airthings): $150 to $200. Battery-powered, no app required. Displays 1-day, 7-day, and long-term average on the device.
- Airthings View Radon: $200 to $250. Wi-Fi connected, smartphone app integration, also measures temperature and humidity.
- Airthings Wave Plus: $250 to $300. Adds VOC and CO2 sensors; same radon performance as Corentium.
- Ecosense RadonEye: $175 to $225. Korean-made consumer CRM with Bluetooth app integration.
- Family Safety Products kits: Various $130 to $200 options at major retailers.
Consumer CRMs typically have plus-or-minus 20% accuracy versus 10% to 15% for professional-grade calibrated CRMs. They are accurate enough for personal information but generally not accepted for real-estate transactions.
Sibling guides like the Airthings vs Corentium comparison walk through the consumer CRM options in detail.
Cost per test: comparing the options
The cost-per-test math changes depending on how often you test:
- One short-term test ever: Charcoal kit at $25 wins on cost.
- One short-term test plus one confirmation test: Two charcoal kits at $50 versus a $175 consumer CRM. Charcoal wins.
- Annual re-testing for 5 years: Five charcoal kits at $125 versus one $175 consumer CRM. CRM wins on cost and provides continuous information between tests.
- Real-time monitoring after mitigation: CRM is the only option. $175 to $300 one-time.
- Long-term annual averaging: Alpha-track at $35 wins on simple cost; CRM provides richer data for slightly more.
For most homeowners doing initial screening, a $25 charcoal kit is the right starting point. If the result is elevated and mitigation is performed, a consumer CRM becomes valuable for ongoing post-mitigation monitoring.
What’s included in the kit cost
A typical mail-in kit cost includes:
- The detector or canister itself
- Pre-paid shipping (US Postal Service or similar)
- Lab analysis fee
- Written result delivered by email or postal mail
- Basic interpretive guidance (low, elevated, action-level)
What is generally not included: closed-house condition guidance beyond the printed instructions, real-time consultation about results, chain-of-custody documentation suitable for real-estate purposes, and tamper detection. For those features, professional testing or a consumer CRM is the better fit.
Hidden costs and surprises
Three cost surprises catch homeowners occasionally:
- Rush analysis fees. Standard lab turnaround is 5 to 10 business days. Rush options at $25 to $50 extra return results in 1 to 3 days. For real-estate timing this can matter.
- Multiple-level testing. Some homeowners want to test both the basement and the main living level, which doubles the kit cost. The EPA generally recommends initial testing only at the lowest occupied level.
- Confirmation testing. If the initial result is between 4 and 10 pCi/L, the EPA recommends a confirmation test before deciding on mitigation, which adds another $25 to $50.
For Colorado-specific pricing patterns and discounted state-program kits, the CDPHE radon page lists current programs.
Where to buy
Mail-in kits are widely available:
- State and county health departments (often discounted in radon-priority states like Colorado)
- Online directly from kit makers (AccuStar.com, RadonAway.com)
- Amazon and other online retailers
- Home Depot, Lowe’s, Ace Hardware (Pro-Lab and First Alert kits are commonly stocked)
- Hardware stores and pharmacies in radon-priority regions
Consumer continuous monitors are mostly online (Airthings, Corentium, Ecosense direct websites and Amazon) with limited brick-and-mortar availability at electronics retailers.
Front Range cost specifics
Colorado homeowners have access to occasional CDPHE-discounted kits through county health departments. These programs come and go but typically offer short-term charcoal kits for $10 to $15. The CDPHE radon page lists current participating counties and pricing. For homeowners not catching one of those programs, a $25 mail-in kit from a major brand is the standard initial test cost on the Front Range.
For sibling cost comparisons, see the best radon test kits buyer’s guide for specific kit recommendations and the radon mitigation cost overview for what to budget if a kit returns an elevated result.
The bottom line on radon test cost
For DIY initial screening, a $25 charcoal mail-in kit is the right starting point. For ongoing monitoring or post-mitigation verification, a $175 consumer continuous radon monitor pays for itself within a few years and provides much richer information. Long-term alpha-track detectors at $35 are the budget choice when seasonal averaging matters. Professional testing is a separate category covered in detail in the radon testing cost guide.
Hidden costs that show up after the kit arrives
A few cost surprises catch first-time DIY testers occasionally. Some kits ship without batteries (consumer CRMs), which means an extra trip to the hardware store. Some kits require activating the lab account online before deployment, and skipping the activation step can result in samples being rejected at the lab. Some lab analyses produce ambiguous results (close to detection limits) that require a follow-up TEM or repeat test, adding $25 to $150 to the total. None of these are dealbreakers, but they are worth knowing before assuming a $25 kit is the final cost.
The other cost worth flagging: shipping requirements. Most charcoal canisters need to be shipped within a few hours of test conclusion, which means having a postage drop-off location identified in advance. Late shipping can degrade the sample and produce unreliable results.
How to choose between brands
Within the DIY kit market, the major brands (AccuStar, RadonAway, Pro-Lab, First Alert) all use NRPP-listed labs and produce reliable results when used correctly. Brand selection is mostly about availability and minor convenience features rather than meaningful accuracy differences. Consumer CRM selection (Airthings vs Ecosense vs others) is more nuanced because the connectivity, app, and additional sensor features vary substantially. For homeowners primarily interested in radon readings, the Corentium Home offers the best balance of accuracy, simplicity, and price. For homeowners interested in broader indoor air quality, the Airthings Wave Plus adds VOC and CO2 sensing for a small premium.
References
- EPA Citizen’s Guide to Radon — U.S. Environmental Protection Agency
- CDPHE radon program and discounted kit availability — Colorado Department of Public Health and Environment
- CDC radon health information — Centers for Disease Control and Prevention
- EPA radon program overview — U.S. Environmental Protection Agency
If you’re a Front Range homeowner unsure whether a $25 charcoal kit or a $175 consumer monitor fits your situation, drop us a note through our contact page. A short conversation usually clarifies which option fits your home, your timeline, and your testing goals.