Radon mitigation system cost ranges by region and source, fan running and replacement costs, retest costs, and what a Canadian contract should include.
Photo: Famartin, CC BY-SA 4.0, cropped, via Wikimedia Commons.
$2,000 to $3,000
Health Canada's estimate for a sub-slab or sub-membrane depressurization system, materials and labour, in its Reduction Guide. An estimate, not a quote; running the fan costs about $50 to $75 a year.
Health Canada’s estimate covers a standard system, materials and labour included. A system can be installed in less than a day, Health Canada says. Your own price comes from a written quote by a C-NRPP professional who has seen your house. See how a system works and how much it lowers radon.
Health Canada says a mitigation system costs about the same as other common repairs, like replacing a furnace or an air conditioner. Its estimate is for a sub-slab or sub-membrane depressurization system. It covers both materials and labour.
Use the estimate to start your budget. Every house is different, so the price that counts is the one in a written quote. CARST advises getting that quote from a C-NRPP professional who has seen the house. See how to find and check a certified installer.
Take Action on Radon reported an average cost from installs across Canada.
$2,718
Average cost of a mitigation system across 256 homes in Take Action on Radon's 2019 to 2020 program, installed by C-NRPP certified professionals. A program sample, not a current price survey.
Other groups publish their own ranges. We show each one with its source and do not combine them.
In the program report, the average was highest in British Columbia and Yukon, at $3,297. It was lowest in Quebec, at $2,051. The report covers 256 homes that entered the program in 2019 to 2020, all with C-NRPP certified installers. It reflects past installs by program entrants. It is not a current price survey. See the grants, loans and credits that can help you pay.
Health Canada says the fan must run all the time, and it adds a yearly electricity cost. The amount depends on the fan’s size and your local energy rates.
$50 to $75 a year
Health Canada's estimate of the yearly electricity cost of a radon fan. It depends on the fan's size and local energy rates, and the fan runs all the time.
Leave the fan on. Add its running cost to your yearly home budget. Find out what the fan’s label and gauge tell you.
Health Canada says a radon fan typically lasts five to ten years or more. If you stay in the house for years, budget for a new fan at some point.
$200 to $300
Health Canada's estimate for replacing a radon fan. A fan typically lasts five to ten years or more.
Keep the replacement cost in your long-term budget, next to the yearly electricity cost. Find certified installers near you, all listed free.
Health Canada’s September 2026 factsheet sets out three tests after a system goes in. Budget for them along with the install.
Health Canada says the long-term follow-up test should not be done by the company that installed the system. Have another company do it. See how to run the long-term follow-up test.
Get the contract in writing before work starts. Health Canada recommends that it include these items:
Ask whether the contractor will guarantee to bring radon down to a set maximum level. Health Canada notes that many contractors offer this. Make sure the guarantee is written into the contract. A guarantee is a contract term, and it is separate from insurance.
Liability insurance and workers’ compensation protect you if someone is hurt or your property is damaged during the work. Before you assume your home insurance pays for radon testing or mitigation, ask your insurer. See the warning signs to watch for in a quote or contract.