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Radon Mitigation in Illinois

119 radon mitigation in Illinois are listed on EdgeLocal. Featured businesses appear first; ratings shown are from each business's Google Business Profile.

Radon mitigation contractors perform radon testing, install sub-slab depressurization systems with fans and piping, seal cracks and sump pits, and verify reduced levels with follow-up testing.

Hiring radon mitigation in Illinois: what to know

Radon mitigation contractors test for and reduce radon gas levels in homes. Radon mitigation contractors perform radon testing, install sub-slab depressurization systems with fans and piping, seal cracks and sump pits, and verify reduced levels with follow-up testing.

How much do radon mitigation cost?

Typical U.S. pricing is $900–$2,500 for a typical mitigation system. What moves the price:

Cost factorWhy it matters
Foundation typeSlabs, crawlspaces and basements vary.
Soil permeabilityTight soils may need more suction points.
Pipe routingInterior versus exterior routing affects cost.
SealingSump lids and crack sealing add cost.
TestingPost-mitigation testing confirms results.

How to hire a radon mitigation contractor

  1. Verify state certification. Iowa, Minnesota, Illinois and Nebraska credential radon professionals.
  2. Ask about post-mitigation testing. Confirm levels below 4 pCi/L.
  3. Discuss fan placement. Fans should be outside living space.
  4. Check warranty. Ask about fan and performance warranties.
  5. Ask about system monitoring. Manometers show the system is working.

Red flags to watch for

  • Not state certified where required
  • No post-mitigation test
  • Fan installed in living space
  • Guarantees zero radon

Licensing in Illinois

Radon testers and mitigators must be state-certified in Iowa, Minnesota, Illinois and Nebraska; other states rely on national certification programs.

Illinois has no statewide general contractor license; licensing is handled by cities and counties. Roofers must be licensed by the Illinois Department of Financial and Professional Regulation, and plumbers by the Illinois Department of Public Health. Radon professionals are licensed by the Illinois Emergency Management Agency.

Best time to hire

Radon testing and mitigation are year-round; winter testing often shows higher levels.

Related services

Radon Mitigation in Illinois: FAQs

How do I find a good radon mitigation contractor in Illinois?

Compare local radon mitigation on EdgeLocal by Google rating, review count and hours, then request written quotes from at least three. Verify Illinois licensing where it applies.

How much does a radon mitigation contractor cost in Illinois?

Typical U.S. pricing is about $900–$2,500 for a typical mitigation system. Local prices in Illinois vary with labor rates, materials and season — these figures are industry estimates, not EdgeLocal data.

What radon level requires action?

The EPA recommends mitigation at 4 pCi/L or higher.

Is radon common in Iowa?

Yes. Iowa has among the highest average indoor radon levels in the U.S.

How long does mitigation take?

Most systems are installed in one day.

How much do radon mitigation charge?

Typical U.S. pricing runs about $900–$2,500 for a typical mitigation system. The biggest drivers are foundation type, soil permeability, pipe routing. These are industry estimates, not EdgeLocal data — get at least three written quotes.

Do radon mitigation need a license in Illinois?

Radon testers and mitigators must be state-certified in Iowa, Minnesota, Illinois and Nebraska; other states rely on national certification programs. In Illinois: Illinois has no statewide general contractor license; licensing is handled by cities and counties.

When is the best time to hire radon mitigation in Illinois?

Radon testing and mitigation are year-round; winter testing often shows higher levels. Northern Illinois has harsh winters and deep frost, while central and southern Illinois see severe thunderstorms, hail and humid summers.

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