How Much Does Radon Testing and Mitigation Cost in Canada?

Quick answer:

Testing costs between $30 and $300 depending on whether you go DIY or professional. If your results come back high and you need a mitigation system installed, most Canadian homeowners pay somewhere between $1,500 and $3,000, with the national average sitting around $2,700. That said, there's enough variation in both numbers that the full picture is worth understanding before you make any decisions.

Why this is harder to price out than it should be

Radon costs aren't like getting a quote for a new furnace or a roof repair. There's no standard job. Two houses on the same street can require completely different mitigation approaches depending on foundation type, how the house is built, and where a contractor needs to route a pipe. Add regional differences in contractor availability and local market rates, and you end up with a range that can feel frustratingly wide.

That's not a dodge. It's just the reality of how radon mitigation works. The goal of this article is to give you enough context that when you do get a quote, you'll know whether it makes sense.

The cost of radon testing

Before mitigation is even on the table, you need a test result. And the good news is that testing is cheap, especially if you do it yourself.

DIY long-term test kits — $30 to $60

This is what Health Canada recommends for most homeowners, and it's the most reliable way to get an accurate picture of your radon levels. You place a small detector in the lowest livable area of your home, leave it for at least 90 days, then mail it to a lab. Results come back within a few weeks.

The 90-day minimum matters. Radon levels fluctuate day to day and season to season, so a longer test averages out those swings and gives you a number you can actually act on. Most kits in Canada cost between $30 and $60 and are available online or at hardware stores.

DIY short-term kits — $30 to $60

Short-term kits follow the same basic process but only need 48 to 96 hours. The cost is similar, but the tradeoff is accuracy. A two-day snapshot can miss a lot. Health Canada doesn't recommend short-term tests for making mitigation decisions, though they're sometimes used to get a rough read on a home quickly, like during a tight real estate window.

If you use one, treat the result as a starting point, not a final answer.

Professional testing — $150 to $300+

A certified radon professional will place continuous electronic monitors in your home, typically for 48 to 96 hours. These devices log levels hourly and produce a detailed report. You're paying for their time, the equipment, and the documentation.

This makes sense in a few situations: real estate transactions where the seller needs verified results quickly, rental properties where a landlord wants a professional record, or any situation where you want something more defensible than a mail-in kit. Post-mitigation testing, which confirms a system is working, often falls into this category too.

Understanding your results before you spend anything

Once your test comes back, the number you're looking at is measured in becquerels per cubic metre, written as Bq/m³. Health Canada's action level is 200 Bq/m³. That's the threshold at which mitigation is recommended.

If you're below 200, you don't need a mitigation system right now. That said, Health Canada does note that there's no completely safe level of radon exposure, so if you're sitting in the 100 to 199 range, it's reasonable to retest in a few years or take some basic steps to improve ventilation. You're not in crisis, but it's worth keeping an eye on.

If you're above 200, mitigation is the right move. The higher the number, the more urgency there is. A result of 600 or 800 Bq/m³ isn't a reason to panic, but it is a reason to get moving sooner rather than later.

One thing worth knowing: a single test result, especially a short-term one, doesn't tell the whole story. If your number is just over 200, a long-term test is a reasonable second step before committing to a mitigation system. A certified contractor can help you interpret what you're seeing.

The cost of radon mitigation in Canada

Most Canadian homeowners who need a mitigation system installed pay somewhere between $1,500 and $3,000. The national average is around $2,700. Some jobs come in under that, some go higher. What drives the price in either direction is usually one of a few things.

The most common system: sub-slab depressurization

The large majority of radon mitigation in Canadian homes uses a method called sub-slab depressurization. A contractor drills one or more holes through your concrete floor, inserts a pipe, and connects it to a fan that runs continuously. The fan creates negative pressure beneath the slab, drawing radon gas out from under the house and venting it outside before it can get in.

It works well, it's relatively unobtrusive, and in most homes it brings radon levels down significantly, often below 100 Bq/m³. The fan runs 24/7 but uses about as much electricity as a light bulb.

A standard single-point installation in a typical Canadian home is where that $1,500 to $2,500 range usually applies.

What pushes the cost up

A few things can take a quote from average to higher end.

Multiple suction points. Some homes, particularly those with complex foundations or multiple foundation types, need more than one entry point for the pipe. Each additional point adds to the labour and material cost.

Pipe routing complexity. Getting the pipe from under your slab to the exterior of your home isn't always straightforward. If a contractor needs to run pipe through finished living space, punch through multiple floors, or work around obstructions, that takes more time.

House size and foundation type. Larger homes with bigger footprints sometimes need more suction to depressurize effectively. Homes with crawlspaces, block foundations, or drain tile systems may need a different approach entirely, which can affect both complexity and cost.

Other system types

Sub-slab depressurization is the go-to, but it's not the only option.

Crawlspace depressurization works similarly but targets an unfinished crawlspace rather than a concrete slab. It often involves laying a membrane across the crawlspace floor and routing a pipe through it. Costs are comparable to sub-slab work but vary based on crawlspace accessibility and condition.

Drain tile depressurization uses your home's existing drainage system as the collection point instead of drilling new holes. It's less common but can be effective in the right house.

Heat recovery ventilator upgrades are sometimes recommended as a complementary measure, particularly in tighter, newer homes. An HRV improves overall air exchange and can help reduce radon levels, though it's rarely sufficient on its own above 200 Bq/m³.

What a quote should include

A proper mitigation quote should cover the installation itself, the fan unit, all piping and fittings, and any patching around penetrations. Most reputable contractors also include a post-installation radon test, either performed by them or with a test kit left for you to complete, to verify the system is actually working.

Real talk:

Not every quote includes post-mitigation testing. Ask specifically whether it's included. If a contractor installs a system and doesn't verify the result, you have no way of knowing whether it worked. That's not acceptable at any price point.

A few things that aren't always included: electrical work if a new outlet needs to be installed near the fan, drywall repair if pipe routing requires opening walls, and any follow-up visits if the first installation doesn't bring levels down far enough. Ask about these upfront.

Regional cost differences

Radon risk isn't evenly distributed across Canada, and neither are contractor supply or local market rates.

The Prairie provinces, particularly Manitoba, Saskatchewan, and Alberta, have some of the highest radon concentrations in the country. They also have a more established contractor base because demand has been higher for longer. That competition tends to keep prices reasonable and means you're more likely to find experienced contractors with a track record.

In parts of Atlantic Canada, Northern Ontario, and some areas of BC, contractor availability is thinner. In those markets, you may have fewer options to compare quotes against, and travel costs can sometimes be factored into pricing if a contractor is coming from a distance.

This doesn't mean mitigation will necessarily cost more in less-served regions, but it does mean getting multiple quotes is more important, and you may need to be more patient in finding someone who's available.

Rebates and financial assistance

A handful of provinces have offered rebate programs to offset the cost of radon mitigation, though availability and amounts change. As of now, here's where things stand.

Manitoba has historically offered one of the stronger rebate programs in the country through Manitoba Hydro's Power Smart program. Homeowners have been able to claim partial rebates on mitigation system installation.

New Brunswick and Nova Scotia have both had programs through their provincial energy efficiency agencies. The specifics, including whether they're currently active and what amounts are available, are worth confirming directly with Efficiency New Brunswick and Efficiency Nova Scotia.

Some municipalities and utility providers offer their own incentives independent of provincial programs. It's always worth asking your contractor if they're aware of anything current in your area.

Note: These programs change, get paused, and sometimes get discontinued. Before factoring any rebate into your budget, verify directly with the program that it's still active and that your project qualifies.

Red flags to watch for when getting a quote

Most radon contractors are straightforward professionals doing honest work. But there are a few things that should give you pause.

No C-NRPP certification. C-NRPP stands for Canadian National Radon Proficiency Program. It's the national certification standard for radon measurement and mitigation professionals in Canada. Any contractor doing radon work should be certified. You can verify certification at c-nrpp.ca. If someone can't confirm they're certified, move on.

A quote that's significantly lower than others. A $700 mitigation quote in a market where everyone else is quoting $2,000 usually means something is being left out, the system will be undersized, or the contractor doesn't have the experience to know what the job actually requires. Price shop, but be skeptical of outliers on the low end.

No post-installation testing. As mentioned above, any contractor worth hiring will either include a post-mitigation test or tell you clearly how to arrange one. A system installed without verification is a system you can't trust.

Pressure to act immediately. Radon is a long-term risk, not an emergency. A contractor who pushes hard for a same-week commitment without giving you time to compare quotes or ask questions is worth being cautious about.

Find a certified radon contractor near you

If your test results are above 200 Bq/m³, or even if you're still in the testing stage and want professional guidance, the next step is finding someone qualified to help.

RadonFinder.ca lists certified radon professionals across Canada. You can search by city, province, or postal code to find contractors in your area, compare listings, and reach out directly. Every contractor in the directory carries verified certification, so you're starting from a trustworthy baseline rather than hoping a Google search turns up someone legitimate.

Getting two or three quotes before committing is always worth the time. Most contractors will do a site assessment before quoting, which also gives you a chance to ask questions and get a sense of whether you're dealing with someone who knows what they're talking about.