Environmental Inspection Services
Verified Pro
5.0(1)
Radon Mitigation in Los Angeles, CA
Compare 25 radon mitigation contractors near you in Los Angeles and surrounding area with an average rating of 4.8/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated May 22, 2026
One request, multiple quotes — don't overpay
Verified Pro Installers
Other Businesses in This Area
Radon Mitigation Corp. of America
8+ years onlineFun Guy Inspection & Consulting Inc.
5.0Indoor Safety
5.023½+ years onlineMG Remediation of Los Angeles
5.021+ years onlinePro Environmental Testing
5.04½+ years onlinePropertyHealth, Inc.
5.013½+ years onlineRadon Testing Service Inc
5.0~4 years onlineRapid Rain Response
5.01½+ years onlineLA Mold Testing Inc.
4.96½+ years onlineBlue Line Home Inspections, LLC
4.87+ years onlineFirst to Respond
4.810+ years onlineKNIGHT ENVIRONMENTAL CONSULTING of Beverly Hills - Mold Testing and Inspection
4.8Radon Solutions California LLC
4.4~9 years onlineRapid Response Mold Testing - Los Angeles Mold Inspection & Testing Specialists
4.412½+ years onlineMitigation - 1st Plumber Leak Detection & Water Damage Restoration, Construction, Home Builder, Drywall South Bay Area
4.2~24 years onlineAndersen Environmental
4.0Radon Mitigation in Nearby CA Cities
Other Services in Los Angeles
Access Control & Intercom(42)Alarm System Installation(28)Appliance Installation(23)Artificial Turf Installation(24)Automotive Installs(8)Concrete & Paving(41)Deck & Patio Building(40)Electrical Services(31)EV Charger Installation(11)Fencing & Gate Installation(37)Fire Protection & Sprinklers(35)Garage Door Installation(22)
Radon Mitigation in Los Angeles, CA
Los Angeles radon mitigation specialists in this directory work Pasadena, Glendale, the Westside, the San Fernando Valley, and the South Bay. Most LA homes test below the EPA action level of 4 pCi/L, but Pasadena, La Crescenta, and the foothill communities along the San Gabriel Mountains regularly test elevated due to granite-rich soils and basement-style hillside foundations. Sub-slab depressurization on a typical LA single-family home runs $1,400-$2,400 installed; crawlspace systems with vapor barrier and active vent run $2,200-$3,800.
California Building Code doesn't mandate radon-resistant new construction, but most LA-area mitigation contractors follow ANSI/AARST CC-1000 standards and ensure systems pass post-mitigation testing under 2 pCi/L. The California Department of Public Health publishes a county-by-county radon zone map showing elevated risk areas in the foothills.
Frequently Asked Questions
- Do LA homes really have radon?
- Some do — mostly in the San Gabriel foothills, Pasadena, La Crescenta, and parts of the Westside with hillside basements. Coastal flats test low typically. The only way to know is a 90-day passive test or a 48-hour continuous monitor.
- How do I test for radon in Los Angeles?
- DIY 90-day alpha-track kits run $25-$40 and give an annual average. A 48-hour continuous radon monitor test by a certified mitigator runs $150-$300 and is needed for real-estate transactions.
- Will radon mitigation increase my LA energy bill?
- A typical sub-slab fan draws 25-50W continuously — about $5-$10/month at LADWP rates. The depressurization can slightly increase HVAC load in heating mode but the effect is generally small.
About NeedInstall
NeedInstall helps connect customers with local installation professionals across Los Angeles 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.