Air Quality Canada, Inc.
Verified Pro
5.0
Radon Mitigation in Markham, ON
Compare 35 radon mitigation contractors near you in Markham and surrounding area with an average rating of 4.9/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated March 28, 2026
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Radon Mitigation in Markham, ON
Radon mitigation in Markham serves a Toronto-metro northern suburb: single-family homes, newer construction, and townhouses. Ontario shows variable radon levels — Health Canada data shows elevated in 10-20% of Markham homes. Typical jobs include sub-slab depressurization for basements (predominant in Ontario homes).
Residential radon mitigation in Markham runs $2,000-$4,500 CAD. Ontario doesn't require radon-specific licensing; C-NRPP certification standard. Markham permits for electrical work. Multilingual (Cantonese, Mandarin) service standard.
Frequently Asked Questions
- Does Markham have radon?
- Yes — 10-20% of Ontario homes test elevated.
- Is multilingual service available?
- Yes — Cantonese/Mandarin standard.
- What's typical cost?
- $2,000-$4,500 CAD for basement system.
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