Cost of Radon Mitigation in Ontario, CA — 2026 Price Guide
In 2026, homeowners in Ontario can expect to pay around $1,410 per system for radon mitigation. Located in San Bernardino County in the Southern California, Ontario has a competitive market for home services. This guide breaks down exactly what drives costs for radon mitigation in your area.
2026 Radon Mitigation Cost in Ontario, CA
| Cost Level | Price (per system) | What to Expect |
|---|---|---|
| Budget / Low-End | $752 | Basic scope, standard materials, smaller projects |
| Average / Mid-Range | $1,410 | Typical project scope with quality materials |
| Premium / High-End | $2,820 | Large scope, premium materials, complex projects |
Prices are estimates for Ontario, CA in 2026 and reflect local market conditions in San Bernardino County County. Your actual cost will depend on the specifics of your project.
Factors That Affect Radon Mitigation Cost in Ontario
Several factors determine what you'll pay for radon mitigation in Ontario. Understanding these helps you budget accurately.
- Type of mitigation system needed
- Foundation type (slab, crawl space, basement)
- Number of suction points required
- Fan size and location
- Sealing requirements for cracks and openings
- Post-mitigation testing costs
- Aesthetics of exterior piping
What Ontario Homeowners Should Know
Always verify your Ontario radon mitigation contractor's CSLB license at cslb.ca.gov before signing a contract.
How to Save Money on Radon Mitigation in Ontario
Getting the best deal on radon mitigation in Ontario comes down to timing, preparation, and knowing what to ask.
- Test your home with a $15 DIY kit before hiring
- Choose sub-slab depressurization for the best results
- Get post-mitigation testing to verify effectiveness
- Install during other construction for lower costs
- Ask about radon-resistant construction for new homes
Frequently Asked Questions
How much does radon mitigation cost in Ontario, CA?
The average cost of radon mitigation in Ontario is approximately $1,410 per system in 2026. Prices range from $800 to $3,000 depending on project scope.
How long does radon mitigation take in Ontario?
Most radon mitigation projects in Ontario take 1-2 days to complete. Factors like project complexity and weather in San Bernardino County can affect the schedule.
Do I need a permit for radon mitigation in Ontario?
Generally, basic radon mitigation projects in Ontario do not require a permit.
How do I choose a radon mitigation contractor in Ontario?
Get at least three quotes from Ontario contractors, verify their CSLB license, check reviews, and never pay more than 10% or $1,000 upfront.
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