You tested your home, the number came back high, and now you want one thing: a straight answer on what it costs to fix. Here it is. Most radon mitigation systems in Canada run $2,000 to $3,500. That's the honest range for a typical single-family home.
But “typical” does a lot of work in that sentence. Your home isn't average. It has its own foundation, its own size, its own quirks. So let's break down what actually moves the price, what a fair quote includes, and where you can and can't save money.
The short answer: $2,000 to $3,500
For most Canadian homes, a professional radon mitigation system lands between $2,000 and $3,500 installed. That covers the standard fix — a sub-slab depressurization system — plus the fan, the sealing work, and a verification re-test to prove it worked.
Some homes come in under $2,000. Some complex ones run past $4,000. But if a quote is way outside that band in either direction, ask why. A price that looks too cheap often skips the re-test or uses a weak fan that won't hold up.
Never pay to mitigate a level you haven't confirmed. If you don't have a recent result yet, start with our radon testing guide. Testing is the only way to know your home's real level.
What drives the cost
Two homes on the same street can get different quotes. Here's what makes the number go up or down.
Home size and layout
Bigger footprint, more floor over the slab, more air to move. A large or sprawling home may need a stronger fan or more than one suction point. Both add cost.
Foundation type
A poured concrete basement with good sub-slab gravel is the easy case. Homes with a crawl space, a slab-on-grade, multiple foundation levels, or an addition are harder. More sealing, more labour, higher price.
The sump pit
If your home has a sump, it's often the best spot to draw radon from, but it has to be capped with an airtight lid. That's usually a small add, not a big one, but it's part of the job.
System type
Sub-slab depressurization is the standard fix and what most quotes are built around. If your home needs a different approach, like sealing a crawl space with a membrane, the materials and labour change the total.
Where the pipe runs
The radon pipe has to vent above the roofline. An interior run through the garage or a closet is clean and simple. Running it up the outside of the house, or through finished space, takes more work.
What a fair quote includes
Price is only half the story. A cheap quote that leaves things out isn't cheap. A complete radon mitigation quote should include:
- On-site assessment of your foundation, slab, and sump
- Full system design and installation, usually in a single day
- A quiet, warrantied radon fan
- Sealing of the sump, cracks, and slab penetrations
- A post-install verification test to prove your level dropped
- A written guarantee that your home comes in below 200 Bq/m³
If two of those are missing, the low price isn't really a deal. You'd pay for them later anyway.
How the standard system works
It helps to know what you're paying for. The standard fix is called sub-slab depressurization. A crew cores a hole through your basement slab, runs a sealed pipe down into the gravel underneath, and connects it to a quiet inline fan. The fan creates gentle suction under the whole slab, so radon is pulled out and vented up a pipe above the roofline before it ever reaches your living space. Seal the cracks and the sump, and radon simply takes the path of least resistance: out the pipe, not into your home.
It's a simple idea, and it's the method Health Canada and C-NRPP treat as the standard. Most of the cost is labour, the fan, and getting the details right.
How long does a radon system last?
A well-installed system runs for years with almost no attention. The pipe and seals are basically permanent. The one part that wears out is the fan, which typically lasts around ten years before it needs replacing, usually a few hundred dollars when that day comes. Beyond that, the only upkeep is a quick glance at the system's pressure gauge now and then to confirm it's still pulling.
So the $2,000 to $3,500 is close to a one-time number. Spread over the years you'll own the home, radon mitigation is one of the cheaper things you'll ever do to it — and unlike a lot of home work, this one is about health, not looks.
DIY versus hiring a pro
Can you install a radon system yourself? Technically yes. Should you? For most people, no — and here's the honest reasoning, not a sales pitch.
A DIY sub-slab kit might cost $300 to $700 in parts. That's real savings on paper. But radon mitigation is easy to do badly. Drill the suction point in the wrong spot, undersize the fan, or seal poorly, and you get a system that runs, makes noise, raises your power bill, and doesn't bring the level down. You won't know it failed unless you re-test, and many DIYers skip that step.
A C-NRPP certified pro sizes the system to your home, guarantees the result, and re-tests to prove it. If you're handy, have a simple basement, and will commit to testing before and after, DIY can work. For everyone else, paying a certified pro to get it right once is the cheaper path over time.
Financing and grants
Straight talk: there is no national radon mitigation grant that pays for your system in Canada. Be careful with any company that claims otherwise. What does exist:
- Some provincial or municipal healthy-home and energy-efficiency programs occasionally include radon. Availability changes, so check your province's current programs directly.
- Many mitigation companies offer their own financing or payment plans. Ask.
- If you're buying or selling, radon mitigation is often negotiated into the deal.
Don't let “is there a grant” stop you from testing. A $30 test kit tells you whether you even have a problem to solve.
Get an accurate quote for your home
Nobody can give you an exact price over the phone without seeing your foundation. A good company gives you a fixed quote after a free on-site assessment, then sticks to it. Radon Removals runs C-NRPP certified crews in cities across Canada's higher-radon regions. Not sure what your reading even means? Start with our guide to safe radon levels, or check whether your area runs high in Canada's radon hotspots. When you're ready, pick your city below for local pricing and a free assessment.