RadonClean
About
Provides DIY and official radon measurement, testing, and mitigation system installation. Services offered for homeowners, real estate, and new built houses.
Key Signals
Free · 60 seconds
Is your home at risk?
Answer 5 quick questions to get a personalized radon risk estimate based on your home and location.
Take the assessment →C-NRPP Certified Professional
Byung Sung Lee
C-NRPP ID: CRT-201755TestingExpires Jul 2028C-NRPP ID: CRMT-201836MitigationExpires Jul 2028
Location
Profile score breakdown
- ✓Phone number15/15
- ✓Website15/15
- ✓Business description15/15
- ✓Address10/10
- ✗Service area listed0/10
- ✗Claim verified0/10
- ✗Google rating0/15
- ✗Photos0/10
Needs Work
Services
Credentials
Own this business?
Claim & verify your listing →Listed Mar 2026
Free · 60 seconds
Is your home at risk?
Answer 5 quick questions to get a personalized radon risk estimate based on your home and location.
Take the assessment →Learn More
Useful resources related to radon testing and mitigation.
Test before you call a pro
Know your radon level in Markham first
A home monitor tells you whether you need mitigation at all, and later confirms it worked. Health Canada bases decisions on a 3-month average, ideally through winter.
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Compare and Plan Next Steps
Tools and resources to help you move forward with confidence.
Other Professionals in Markham
BGIS
BGIS is a C-NRPP certified radon testing and mitigation professional serving Markham, ON and across ON. They offer complete radon solutions from initial testing through to mitigation system installation.