#1
Dennis Ironi
Los Angeles, CA
Google rating: 5.0 (25 reviews)
Reviews: 25
Certifications: 1
Certifications
NRPP Measurement Professional
Services
Testing
Best Radon Contractors in Los Angeles, California (2026)
Ranked using real Google ratings, review counts, and certification data only.
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#2
Comets Mold testing
Los Angeles, CA
Google rating: 5.0 (2 reviews)
Reviews: 2
Certifications: 0
Services
MitigationTestingCrawlspaceCommercial
#3
LA Mold Testing Inc.
Los Angeles, CA
Google rating: 4.9 (59 reviews)
Reviews: 59
Certifications: 0
Services
Testingvapor barrierPost-Mitigation Testing
How We Rank
- Google rating: higher average ratings rank higher.
- Review count: more reviews break ties between similar ratings.
- Certification count: more certifications break ties after rating and review metrics.
- Verified data only: rankings are based on stored profile data, not manual edits or paid placement.
FAQ
Who is the best radon contractor in Los Angeles?
Dennis Ironi is currently ranked #1 in Los Angeles based on Google rating, review volume, and certification count from our verified data sources.
How many radon contractors are in Los Angeles?
We currently list 3 radon contractors in Los Angeles, California.
What should I look for?
Focus on strong ratings with meaningful review volume, current professional certifications, and clear service coverage for your home type.