
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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AmeriSpec Inspection Services of Willowdale & Toronto North
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5.0Mitigair
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5.0Toronto Radon Removal
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4.9Advantage Airtech ClimateCare
4.925½+ years onlineAura Home Inspections Inc.
4.9Solidcare Home Improvements
4.8Radon Gas Expert
4.7Radon Detect
4.3The Home Inspectors Group Inc.
4.319+ years onlineRadon Mitigation in Nearby ON Cities
Other Services in Markham
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.
About NeedInstall
NeedInstall helps connect customers with local installation professionals across Markham and surrounding communities. Featured contractors have claimed their profile and verified their business information. Listings marked as "Verified Pro" have been confirmed by the business owner.



