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Verified Reviews for Radon Detection And Reduction pros in Sandwich, IL

*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 December 06, 2025

Find Radon detection and reduction specialists in Sandwich

Avatar for AdvantaClean of Northwest Chicagoland

AdvantaClean of Northwest Chicagoland

4.97(
105
)
•Approved Pro

AdvantaClean of Northwest Chicagoland

4.97(
105
)
•Approved Pro
Customers say: Super punctual
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
1994 years of experience

AdvantaClean of Northwest Chicagoland is locally owned and operated by JT and Marie Maier. Because your satisfaction is our top priority, we promise to provide you with the best service experience possible. We have a team of caring, industry-trained and certified professionals ready to address your needs. Whether responding to emergency water damage or mold or moisture intrusion, we ensure that the air you breathe is clean and healthy. We look forward to meeting you!

"Patryk and Mathew were excellent and very professional! Excellent work ethic, communication and very thorough job! Looks 100% better and feels clean…. Never saw a clean attic until today! Excellent job! Highly recommend this company and these technicians!"

Darryl R on October 2025

AdvantaClean of Northwest Chicagoland is locally owned and operated by JT and Marie Maier. Because your satisfaction is our top priority, we promise to provide you with the best service experience possible. We have a team of caring, industry-trained and certified professionals ready to address your needs. Whether responding to emergency water damage or mold or moisture intrusion, we ensure that the air you breathe is clean and healthy. We look forward to meeting you!

"Patryk and Mathew were excellent and very professional! Excellent work ethic, communication and very thorough job! Looks 100% better and feels clean…. Never saw a clean attic until today! Excellent job! Highly recommend this company and these technicians!"

Darryl R on October 2025

Avatar for PROFESSIONAL RADON SYSTEMS INC

PROFESSIONAL RADON SYSTEMS INC

4.95(
80
)
•Approved Pro

PROFESSIONAL RADON SYSTEMS INC

4.95(
80
)
•Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
1988 years of experience

****** WE ARE NOT A RADON TESTER***** We have been servicing the greater Chicagoland area since 1988. Our state certified technicians perform all radon mitigation installations. We offer hassle-free, prompt, professional residential and commercial radon mitigation services. ******* PLEASE NOTE!!!****** The coupon that is available on our listing is only valid for Angi members. If you are taking advantage of this savings opportunity, the coupon must be printed and presented along with your payment. NO EXCEPTIONS!

"Fix my problem and awesome customer service "

Luis C on October 2025

****** WE ARE NOT A RADON TESTER***** We have been servicing the greater Chicagoland area since 1988. Our state certified technicians perform all radon mitigation installations. We offer hassle-free, prompt, professional residential and commercial radon mitigation services. ******* PLEASE NOTE!!!****** The coupon that is available on our listing is only valid for Angi members. If you are taking advantage of this savings opportunity, the coupon must be printed and presented along with your payment. NO EXCEPTIONS!

"Fix my problem and awesome customer service "

Luis C on October 2025

Avatar for Environmental Testing & Research Laboratories, Inc

Environmental Testing & Research Laboratories, Inc

4.85(
347
)

Environmental Testing & Research Laboratories, Inc

4.85(
347
)
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018

Avatar for VSI Radon Reduction Corp.

VSI Radon Reduction Corp.

4.85(
82
)

VSI Radon Reduction Corp.

4.85(
82
)
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

VSI Radon Reduction Corp. has two locations to serve the greater Chicagoland and Rockford area. Providing radon reduction since 1987. State licensed installer at every job. We install and service sump pumps and backup pumps as well.

"Great service!"

Norman C on March 2025

VSI Radon Reduction Corp. has two locations to serve the greater Chicagoland and Rockford area. Providing radon reduction since 1987. State licensed installer at every job. We install and service sump pumps and backup pumps as well.

"Great service!"

Norman C on March 2025

Avatar for RadoVent Illinois LLC

RadoVent Illinois LLC

4.96(
68
)

RadoVent Illinois LLC

4.96(
68
)
Customers say: Quality work
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers

RadoVent Illinois llc is dedicated to installing top performing radon mitigation systems that block radon gas before it enters the home. We have installed thousands of radon mitigation systems in residential homes, office buildings, apartments and government buildings. Our courteous team of licensed radon remediation technicians go the extra mile to ensure your 100% satisfaction.

"Did a fantastic job. We are extremely pleased. Very clean and professional installation. Our Radon levels went from 11.5 to 0.4."

Rick W on September 2023

RadoVent Illinois llc is dedicated to installing top performing radon mitigation systems that block radon gas before it enters the home. We have installed thousands of radon mitigation systems in residential homes, office buildings, apartments and government buildings. Our courteous team of licensed radon remediation technicians go the extra mile to ensure your 100% satisfaction.

"Did a fantastic job. We are extremely pleased. Very clean and professional installation. Our Radon levels went from 11.5 to 0.4."

Rick W on September 2023

E C Siding & Windows

4.88(
17
)

E C Siding & Windows

4.88(
17
)
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
"They had done a good job on my skylight. So I hired them to replace my grandsons roof. Showed up immediately. Started the job a day or two later. Finished it in a day and a half. Reasonable rate. Another excellent job. .Thank you, EC ROOFING ."

Paula G on December 2020

"They had done a good job on my skylight. So I hired them to replace my grandsons roof. Showed up immediately. Started the job a day or two later. Finished it in a day and a half. Reasonable rate. Another excellent job. .Thank you, EC ROOFING ."

Paula G on December 2020

Avatar for Trinity Electrical and Radon Mitigation

Trinity Electrical and Radon Mitigation

5.00(
6
)

Trinity Electrical and Radon Mitigation

5.00(
6
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We are fully licensed, insured and bonded. We have 3 service vehicles fully lettered and clean ready to complete the tasks at hand. all of our employees will arrive in uniform and wear shoe covers before entering your home or business.

We are fully licensed, insured and bonded. We have 3 service vehicles fully lettered and clean ready to complete the tasks at hand. all of our employees will arrive in uniform and wear shoe covers before entering your home or business.

Avatar for The Housedoctors, Inc.

The Housedoctors, Inc.

5.00(
1
)

The Housedoctors, Inc.

5.00(
1
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Inspection Company with over 5,000 inspections completed. State Licensed, ASHI Certified with E&O and Liability insurance. Excellent references and reviews. Practicing the lost art of customer service. Covering Chicagoland and most suburbs. Inspection report delivered within 24 hours including photos and summary. Please visit our website at housedoctorsinc.com or call for additional info.

Inspection Company with over 5,000 inspections completed. State Licensed, ASHI Certified with E&O and Liability insurance. Excellent references and reviews. Practicing the lost art of customer service. Covering Chicagoland and most suburbs. Inspection report delivered within 24 hours including photos and summary. Please visit our website at housedoctorsinc.com or call for additional info.

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Radon Detection and Reduction questions, answered by experts

Short-term tests take 2-7 days, while long-term monitoring may require up to 90 days for accurate results.

Use a radon test kit or hire professionals to conduct a detailed assessment of radon levels in your home.

A professional indoor air quality inspection takes anywhere from one to three hours, depending on the size of your home and the number of necessary samples. After the test, the specialist will discuss the findings, but you won’t get a full written report for 2 to 10 days, though you can ask your pro to expedite the process, if needed. 

In most states, radon testing companies don’t need to be licensed or certified by the state, but the companies that analyze the test results and develop radon mitigation protocols do. You should choose a radon testing company that suits your needs, but before hiring a mitigation specialist, check our state licensing tool to make sure the company is properly certified.

Results from radon testing usually take a week to process after the test period ends, with expedited services sometimes available for urgent cases.

The Sandwich, IL homeowners’ guide to radon detection and reduction services

From average costs to expert advice, get all the answers you need to get your job done.

See all articles