Los Angeles Metro, CA Radon Data & Mitigation Services

Company
Affordable Inspection Services Inc
Alta Environmental
Andersen Environmental
Clark Seif Clark
County of Los Angeles Dept of Public Health
DL Science Inc
ENCORP
Evista Industries Inc
Guaranteed Property Inspections
Healthy Home Construction Services
Integrated Efficiency Inc
Integrated Property Analysis
South Coast Environmental Consulting Group Inc
Terracon Consultants Inc
US Inspect LLC

Frequently Asked Questions about Radon in the Los Angeles Metro Area

Common questions about radon testing, mitigation costs, and health risks for homeowners in the Los Angeles Metro metropolitan area.

Why are radon levels so high in the Los Angeles Metro area?

Radon levels in the Los Angeles Metro area are driven by the local soil and bedrock composition, which contains naturally occurring uranium. As uranium decays, it produces radon gas that migrates upward through the soil and enters homes through foundation cracks, sump pits, and gaps around pipes. Homes with basements and crawlspaces are especially susceptible because these below-grade spaces are in direct contact with the soil where radon concentrations are highest.

How much does radon mitigation cost in Los Angeles Metro?

Professional radon mitigation in the Los Angeles Metro metropolitan area typically costs between $800 and $2,500, depending on the size and construction of your home. The most common approach is an active sub-slab depressurization system, which a certified contractor can usually install in a single day. Ongoing energy costs for the mitigation fan are minimal—roughly $5–$10 per month—and most systems reduce radon levels by 90% or more.

Are landlords in California required to test for radon?

Radon testing and disclosure requirements vary by state and municipality. Some California jurisdictions require landlords to disclose known radon levels or test results, while others have no mandate. Regardless of local law, the EPA recommends radon testing for all residential properties—including rentals—since radon is the second leading cause of lung cancer in the United States.

Can I sell a house with high radon levels in the Los Angeles Metro area?

Yes. High radon levels do not prevent a home sale, but buyers in the Los Angeles Metro market routinely request radon testing during the inspection period. If levels exceed 4.0 pCi/L, the buyer may negotiate for the seller to install a mitigation system before closing. Having a radon mitigation system already in place can actually be a selling point, demonstrating proactive home maintenance and providing documented proof of safe indoor air quality.

Los Angeles Metro, CA Radon Information

Top 5 Radon Hotspots in the Los Angeles Metro Area

Other Metro Areas in California

Cities in the Los Angeles Metro Area

Radon Mitigation Professionals Serving the Los Angeles Metro Area

Frequently Asked Questions about Radon in the Los Angeles Metro Area

Free Radon Mitigation Quote

Free Radon Mitigation Quote