North York radon testing and mitigation
~672,000 residents. ~1 in 23 homes test above the Health Canada radon guideline.
Why North York homeowners test
North York's diverse housing stock from 1960s bungalows near Sheppard to new Yonge corridor condos means radon varies significantly by specific neighbourhood.
Our North York service
- Testing: $99 (standard) or $399 (real estate)
- Mitigation: $2,800 to $3,800 preliminary estimate 3
- Typical scheduling: within 3-5 business days
- Same-week availability most months
North York-specific questions
Do you service all of North York?
Yes. Every North York neighbourhood including Willowdale, Don Mills, Bayview Village, Hoggs Hollow, North York Centre, Lawrence Manor, Glen Park, Bathurst Manor, York Mills, and Lansing. Same $99 pricing, no distance surcharge.
Which North York neighbourhoods test highest for radon?
Older Don Mills, Willowdale, and Bathurst Manor bungalows from the 1950s to 1970s with finished basements tend to top the list. These homes often have block or stone foundations and basement family rooms with significant time-weighted occupancy. Newer Yonge corridor condos test very low because high-floor units have negligible ground-level exposure.
I live in a North York high-rise condo. Should I test?
Depends on your floor. Floors 1 to 3 can have meaningful radon exposure, especially with parking garage or mechanical room adjacency. Floors 4+ are typically dilute enough that radon is not a practical concern. Detached homes and ground-floor townhomes throughout North York are worth testing regardless of neighbourhood.
Don Mills is one of Toronto's oldest planned communities. Is radon a bigger concern there?
Modestly. Don Mills' original 1950s and 1960s planned-community homes use construction methods that predate modern radon-resistant standards: block foundations, dirt-floor sub-spaces under additions, and finished basement living space. We have tested multiple Don Mills homes with results between 150 and 300 Bq/m³. Worth testing if you live in an original-era Don Mills detached.
About these numbers
Population and home counts come from Statistics Canada's 2021 Census of Population 1 . These are exact figures.
The per-city radon percentage is a synthesis estimate, not a number pulled directly from any single source. We blend three datasets: Health Canada's Cross-Canada Survey of Radon Concentrations in Homes (the 2012 federal baseline) 4 , the University of Calgary's Evict Radon citizen-science mapping project 2 , and Take Action on Radon's aggregated municipal data 5 .
The federal baseline often reports lower above-guideline rates than the newer citizen-science projects. Two reasons: the federal study is now 14+ years old, and the newer citizen-science projects sample more aggressively in homes built under tighter modern building codes (which trap soil gas more effectively than older draftier construction). Where these sources disagree on a specific municipality, our published percentage lands on a working midpoint. So if you click through to the federal survey expecting to find "North York 4.5%" verbatim, you won't. The federal survey may report a lower figure for the same area, and the citizen-science maps often report a higher one. We chose the midpoint because no single source is definitive.
None of this gives you a definitive percentage for your specific home. Two homes on the same street can test 30 Bq/m³ apart. The only reliable answer for your home is a test on that home.
References
- 1.Statistics Canada. Census Profile, 2021 Census of Population↗ (2022)↩
- 2.Evict Radon. Evict Radon National Study↗↩
- 3.Health Canada. Government of Canada Radon Guideline↗↩
- 4.Health Canada. Cross-Canada Survey of Radon Concentrations in Homes: Final Report↗ (2012)↩
- 5.Canadian Association of Radon Scientists and Technologists (CARST). Take Action on Radon↗↩
See our full research bibliography at /sources.