Radon Test Cost in Canada: What You Actually Pay in 2026
A DIY radon kit at Canadian Tire costs about $40. A pro test can run $300. And some Ontario homeowners test for $0.
Same gas. Same goal. Wildly different price tags. So what should you actually pay to find out if your home has a radon problem?
This guide lays out every option by price. We’ll tell you which one fits your situation, and where you can save money without cutting corners.
The short version:
- DIY mail-back kits cost $25 to $50. Fine for a first screen.
- A home radon monitor costs $200 to $400. Buy once, read forever.
- A pro short-term test runs $99 with us, or $150 to $300 across the industry.
- Buying or selling a home? A fast transaction test is $399.
- A long-term 91-day test is $299 and gives the most reliable number.
- Some Ontario homeowners test free through local kit programs.
The full price ladder
Here’s every way to test for radon in Canada, cheapest to priciest.
| Test type | Cost | Time to result | Best for |
|---|---|---|---|
| Free kit program | $0 | 91+ days | Anyone who qualifies locally |
| DIY charcoal kit | $25 to $50 | 1 to 2 weeks (mail-in) | A quick first screen |
| DIY long-term kit | $30 to $60 | 91+ days | A reliable DIY reading |
| Home radon monitor | $200 to $400 | Live, day one | Ongoing tracking |
| Pro short-term test | $99 to $300 | 2 to 7 days | A trusted, documented result |
| Long-term pro test | $299 | 91 days | The gold-standard decision |
| Real estate test | $399 | 2 to 3 days | Buying or selling a home |
Each row solves a different problem. Price isn’t the only thing that matters. Speed and trust matter too.
Let’s break down each one.
Free radon test programs
Yes, free is real. It just isn’t always available.
Some Ontario towns hand out free or cheap radon kits each fall. They partner with a group called Take Action on Radon.
These kits are long-term. You leave one in your home for 91 days, then mail it back. The catch is timing and stock. They run out fast, and mostly in the fall.
If you can get one, take it. It’s the cheapest reliable test there is.
DIY radon kits ($25 to $60)
This is the shelf option. You’ll find kits at Canadian Tire, Home Depot, and Amazon.
There are two main kinds.
Charcoal canister (short-term)
A small charcoal puck in a sealed pouch. You open it, leave it in your basement for 2 to 7 days, then mail it to a lab. Cost: about $25 to $50, lab fee often included.
It’s cheap and fast. But it’s touchy. Humidity, drafts, and open windows can skew the number.
Alpha track kit (long-term)
A small plastic chamber you leave in place for 91 days or more, then mail in. Cost: about $30 to $60.
Health Canada prefers long-term testing for homes.
We break down every kit type in our radon test kit buyer’s guide if you want the deep version.
Home radon monitors ($200 to $400)
A radon monitor is a small device that reads the air all the time. No mailing. No lab. The screen or app shows your level hour by hour.
Popular Canadian picks: Airthings, Corentium, and RadonEye. They run $200 to $400.
The math is simple. One monitor costs about the same as two or three pro tests. If you want to watch your radon for years, or check that a fix is working, a monitor pays for itself.
Want help choosing? See our best radon detectors guide.
Professional radon tests ($99 to $399)
A pro test means a trained tester places a calibrated device, follows Health Canada’s rules, and hands you a written report.
You’re paying for three things a DIY kit can’t give you:
- Correct placement (lowest lived-in level, away from drafts)
- A calibrated, lab-grade device
- A signed report you can hand to a buyer, a builder, or Tarion
Our pricing
We keep it flat and public. Most radon companies hide their price behind a form. We don’t.
- Residential test: $99 flat. A 2 to 7 day test with a written report.
- Real estate test: $399. Faster turnaround for a buy or sell timeline.
- Long-term test: $299. A 91-day test for the most reliable number.
Across the wider industry, a short-term pro test usually runs $150 to $300. Our $99 flat sits below that on purpose.
See full pricing and book a test.
Why the real estate test costs more
The $399 test isn’t a markup for the same work. It’s a different job.
When you’re buying or selling, the clock is tight. You often have days, not weeks. So the test runs under a strict closed-house protocol, on a rush timeline, with documentation a lawyer and a buyer will accept.
We cover the full buyer playbook in our radon test when buying a home guide.
If it’s a new build, there’s more good news. Ontario is the only province where your new home warranty can cover radon. A builder may owe you up to $50,000 in mitigation under Tarion. Our Tarion page walks through it.
DIY kit vs pro test: which should you pay for?
Here’s the honest call. Not every home needs a pro test. Sometimes a $40 kit is plenty.
| Your situation | Best pick | Why |
|---|---|---|
| Just curious, first check | DIY long-term kit | Cheap, reliable enough to screen |
| Want live data for years | Home monitor | Buy once, track forever |
| Basement bedroom, kids below grade | Pro test | You want a number you trust |
| Buying or selling | Pro real estate test | Documented, fast, court-ready |
| New build under warranty | Pro test | Needed for a Tarion claim |
| Retesting after a fix | Home monitor or pro test | Confirms the fix worked |
A DIY kit is a fine first step for most homes. If it reads low, you can relax and retest in a couple of years. If it reads high, that’s when a documented pro test earns its cost.
Where a kit falls short: real estate deals, warranty claims, and any case where the number has to convince someone else. A mailed-in kit with no chain of custody won’t cut it there.
The rule of thumb: pay for a kit to learn, pay for a pro test to prove. A $40 kit answers “should I worry?” A pro test answers “here’s proof, on paper.”
We’d rather tell you to buy a $40 kit than sell you a test you don’t need. That’s the point of testing honestly.
What makes a radon test worth the money
Cheap is only good if the number is right. A wrong reading costs you either way. It scares you when you’re fine, or it lets a real problem slide.
Three things separate a good test from a bad one, at any price:
- Placement. The device sits on the lowest level you actually use. Not a closet. Not next to a window.
- Duration. Longer is better. A 91-day test beats a 2-day test for a big decision.
- Closed-house rules. Windows and outside doors stay shut during short tests. Fans that pull outside air stay off.
Get these wrong and even a $300 test gives you junk. Get them right and even a $40 kit gives you gold. The Government of Canada’s radon overview spells out the placement rules if you’re testing yourself.
What the number means once you have it
You paid for the test. Now what does the result say?
Health Canada’s guideline is 200 Bq/m³.
- Under 100: low. Retest every few years.
- 100 to 200: below the guideline, but not zero risk. Consider a fix, especially with a basement bedroom.
- 200 or higher: act. Plan mitigation. You have time, but don’t sit on it.
Radon is the top cause of lung cancer in Canadians who’ve never smoked.
If your number is high, our Ontario mitigation cost guide shows what a fix runs and who might pay for it.
Where Breathe Radon Free fits
We’re an Ontario testing service, owner-led, based in Guelph. We serve the Greater Toronto Area plus surrounding Southern Ontario.
We publish our prices. We follow Health Canada’s protocols on every job. And we’ll tell you when a $40 kit is all you need.
If your test reads low, we’ll say so. We don’t sell fixes to homes that don’t need them.
Book a $99 radon test in 60 seconds.
Frequently asked questions
How much does a radon test cost in Canada?
It ranges from free to $399. A DIY kit runs $25 to $60. A home monitor is $200 to $400. A pro short-term test is $99 with us, or $150 to $300 across the industry. A real estate transaction test is $399, and a long-term pro test is $299.
Is a cheap DIY radon kit accurate?
It can be, if you use it right. Placement and closed-house rules matter more than price. A well-placed $40 long-term kit gives a reliable screen. A charcoal kit is fine but more sensitive to humidity and drafts.
Do I need a professional test, or is a kit enough?
For a first check on most homes, a kit is enough. You need a pro test when the number has to convince someone else. That means buying or selling a home, or filing a Tarion warranty claim.
Can I test for radon for free?
Sometimes. Some Ontario towns give out free or cheap kits each fall through Take Action on Radon.
How often should I retest?
Every 2 to 5 years for most homes. Retest sooner after a major renovation, a basement finish, or any foundation work. Those changes can move your radon level up or down.
Why is the real estate test more expensive than the $99 test?
The $399 test runs faster and under a stricter protocol, with documentation a buyer and a lawyer will accept. You’re paying for speed and court-ready proof, not just the reading.
Get a $99 radon test booked in 60 seconds →
Authored by the Breathe Radon Free Team. Every claim is backed by a primary source. Full bibliography at /sources.
Ready to test your home?
Get a quote in 60 seconds. Published prices, no sales follow-up.