The typical price range in Ottawa
A standard radon mitigation system (sub-slab depressurization) in the Ottawa area typically costs between $2,500 and $4,500. This includes the core drilling, PVC piping, a radon fan, and post-installation verification. Most Ottawa homes fall in the middle of this range.
Larger or more complex homes — those with multiple foundation types, long exhaust runs, or a combination of basement and crawlspace — can run higher. We provide a fixed, itemized quote after a free assessment so you know exactly what you're paying for.
What drives the cost
Foundation type: A poured-concrete basement with a single suction point is the simplest and least expensive. A rubble or stone foundation, or a dirt-floor crawlspace, may need a membrane and more suction points, increasing cost.
Number of suction points: Some homes need more than one suction point to achieve good sub-slab communication, especially larger footprints or homes with multiple foundation sections.
Sump lid and crawlspace membrane: If your system ties into a sump pit, a sealed sump lid is needed. A dirt crawlspace requires a vapor barrier membrane, which adds cost but also improves moisture and air quality.
What's included (and what to watch for)
A fair quote includes: the radon fan (sized to your home), all PVC piping and fittings, core drilling, exhaust coming through the foundation wall with a vermin guard, a system pressure monitor, electrical connection for the fan, and post-installation verification. It should be a fixed price — not an estimate that could grow.
Watch for quotes that seem unusually low. They may use an undersized fan, skip the sump lid, vent without a vermin guard (which can let pests and debris in), or omit post-installation testing. A system that doesn't actually reduce your radon is a waste of money.
Ongoing costs after installation
The only ongoing cost is electricity for the fan — about 30–80 watts, or $20–$60 per year at Ottawa rates. The fan itself lasts 5–10 years and replacement is a quick, inexpensive service. We recommend an annual visual check to confirm the monitor reads normal. That's it — no filters, no maintenance beyond the fan.