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

*The Angi rating for Radon Detection And Reduction companies in Cortland, 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 Cortland, 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 January 18, 2026

Find Radon detection and reduction specialists in Cortland

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
38 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

Radon Reduction Technologies

4.83(
6
)

Radon Reduction Technologies

4.83(
6
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Radon Detection & Reduction

"Installed radon mitigation system in basement. Pros: 1) reduced overall radon levels by about 75% 2) they did the work in extreme cold temps 3) done in about 4 hours Cons: 1) They arrived late (although they did call to let me know) 2) they did not wear boot covers or put down any floor protector when walking on my carpet 3) they set dirty toolboxes and caulk guns directly on carpet 4) exhaust pipe is too close to roof peak and can be seen from street view of house Overall, good job. I can live with seeing the pipe from the street. I would recommend based on the overall work."

Adam M on January 2018

Radon Detection & Reduction

"Installed radon mitigation system in basement. Pros: 1) reduced overall radon levels by about 75% 2) they did the work in extreme cold temps 3) done in about 4 hours Cons: 1) They arrived late (although they did call to let me know) 2) they did not wear boot covers or put down any floor protector when walking on my carpet 3) they set dirty toolboxes and caulk guns directly on carpet 4) exhaust pipe is too close to roof peak and can be seen from street view of house Overall, good job. I can live with seeing the pipe from the street. I would recommend based on the overall work."

Adam M on January 2018

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.

Avatar for Full Circle Home Inspections

Full Circle Home Inspections

No reviews yet

Full Circle Home Inspections

No reviews yet
4 years of experience

Residential Home Inspections and radon testing. Before i became a home inspector I built houses for 15+ years. I decided to open this small family owned business because I find joy in helping people understand their huge investment in buying a house.

Residential Home Inspections and radon testing. Before i became a home inspector I built houses for 15+ years. I decided to open this small family owned business because I find joy in helping people understand their huge investment in buying a house.

COVERING YOUR ASSETS INSPECTIONS

No reviews yet

COVERING YOUR ASSETS INSPECTIONS

No reviews yet

WE PROVIDE HOME OWNERS WITH A COMPLETE, PROMPT AND PROFESSIONAL HOME INSPECTION. WE ALSO OFFER MOLD TESTING, RADON TESTING AND THERMAL IMAGING. WE ARE LICENSED IN THE STATE OF ILLINOIS. WE ARE A OWNER OPERATED COMPANY AND HAVE BEEN IN THIS LINE OF WORK FOR OVER TEN YEARS.

WE PROVIDE HOME OWNERS WITH A COMPLETE, PROMPT AND PROFESSIONAL HOME INSPECTION. WE ALSO OFFER MOLD TESTING, RADON TESTING AND THERMAL IMAGING. WE ARE LICENSED IN THE STATE OF ILLINOIS. WE ARE A OWNER OPERATED COMPANY AND HAVE BEEN IN THIS LINE OF WORK FOR OVER TEN YEARS.

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Radon Detection and Reduction questions, answered by experts

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

If high radon levels are detected, steps include sealing entry points, installing a mitigation system, and retesting the air regularly to ensure reduced levels.

Your radon fan needs to operate 24/7 to be effective. The only time the fan isn't operating is during its replacement. Radon levels in the home can increase within hours if the fan stops working or something obstructs the stack vent. Fortunately, radon systems require no downtime maintenance between fan changes.

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. 

Since radon typically comes out of the soil, it is most commonly found in the lower levels of a home. In houses with basements, that's a common location for radon. Homes built directly on the ground may have radon on the ground floors. Radon can be found on the upper floors of the home, but often in lower concentrations than in lower levels.

The Cortland, 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.

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