*The Angi rating for Radon Detection And Reduction companies in Sandwich, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.
*The HomeAdvisor rating for Radon Detection And Reduction companies in Sandwich, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.
Last update on May 05, 2026
Serving Sandwich, IL and surrounding areas
Approved
In business since 1988
Free estimates
Customers say: Quality work
"We were very happy with the crew who worked in our home. Very professional. Prepared the site so we could not tell they had even been in our home. Testing following the job indicated that the radon gas was leaving our home. Our radon level went from 12 to 0."
+11
Serving Sandwich, IL and surrounding areas
Approved
In business since 2017
Free estimates
Warranties offered
"Schan did a great job, very professional. He came out to see what the job was before he gave me a quote. I have a huge crawl space which took some time but he stuck with it to finish it in one day. Now I can breathe easier knowing it's taking care of right. I highly recommend Clean Air Radon Systems."
+18
Serving Sandwich, IL and surrounding areas
Approved
In business since 1957
Free estimates
Warranties offered
"Very professional, told us exactly what they were going to do, and they did exactly what they said. Our basement has been dry for 2 years now."
Serving Sandwich, IL and surrounding areas
In business since 1988
Free estimates
Warranties offered
"Radon levels went from about 12 to hovering between 0.4 and 0.1 after about 24 hours. Great work done quick and done well."
+4
Serving Sandwich, IL and surrounding areas
In business since 2015
Small jobs welcome
Credit card accepted
"Technician explained everything about Radon in terms we could totally understand. He was patient, polite, totally knowledgeable and professional."
Serving Sandwich, IL and surrounding areas
In business since 1996
Free estimates
Warranties offered
"He was extremely helpful and went above and beyond other organizations. He wasn't the cheapest option, but he did very good work. Very accommodating."
+20
Serving Sandwich, IL and surrounding areas
In business since 2024
Free estimates
Credit card accepted
Kyle Bak is the leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!\n
Serving Sandwich, IL and surrounding areas
In business since 1998
Free estimates
Credit card accepted
SWAT Environmental, Inc. is the nation's largest radon abatement engineer. Our experienced staff has corrected Radon problems for over 60,000 customers since 1988 with 100% success!
Serving Sandwich, IL and surrounding areas
In business since 1988
Free estimates
Stuedemann Radon Resolutions is a husband and wife team committed to providing expert personal radon-related services to the communities we serve, and is committed to providing all services in accordance with the requirements of the Radon Industry Licensing Act 32, Illinois Administrative Code 422, Licensing of Radon Mitigation Services, and our Quality Assurance Program (QAP). Compliance with our policy is mandatory for all Stuedemann Radon Resolutions, employees involved in radon-related services or practices.\nThe Stuedemann Promise:\nLife-time guarantee on workmanship & unconditional system success; Follow tradition of our 25-year commitment to use of only quality materials; fan manufacturer offer of 5 year warrantee on fan parts; system designed for all lowest-level conditions: basement, crawlspace, slabs; unconditionally guaranteed to reduce radon levels to below 4.0 pCi/L; family-owned and operated construction company since 1985; free estimates and fully insured.
From average costs to expert advice, get all the answers you need to get your job done.
Get clear answers on how much radon remediation costs, including average prices, key cost factors, and tips to save money on your home’s radon mitigation.
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What is radon testing? Radon testing measures the presence and concentration of radon gas within indoor environments. Read on to learn more.
Knowing how to test for radon will keep your home free and safe from this odorless gas—you just have to decide whether to do it yourself or hire a pro.
