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

*The Angi rating for Radon Detection And Reduction companies in Marengo, 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 Marengo, 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 September 07, 2025

Top-Rated Radon detection and reduction specialists in Marengo - Updated Nov 2026

Avatar for Bull's Eye Home Inspection
Bull's Eye Home Inspection
4.8(
28
)
Radon Gas - Testing

Serving Marengo, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Small jobs welcome

"Mat is the inspector realtors hate... tongue-in-cheek. He is extremely knowledgeable, has great attention to detail, and is very honest. If there is something wrong with the property, you better believe he's going to find it. He takes the time and does a thorough job. I highly recommend him!"
Knee wall in Chicago Bungalow
Hydronic floor heating
Small flat roof on gable shingled roof
Overview of townhome in Glenview
Townhome Attic

+4

Response time3 hrs
3 neighbors recently requested a quote
Recommended by92%of homeowners
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Avatar for Gardner Environmental Services
Gardner Environmental Services
4.8(
265
)
Radon Gas - Abatement

Serving Marengo, IL and surrounding areas

Approved

Super Service Award Winner

In business since 1993

Free estimates

Emergency services offered

"Dave Gardner and crew outstanding. Extremely knowledgeable, identified and fixed my radon problem . Very honest and trustworthy"
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+20

Response time5 hrs
9 neighbors recently requested a quote
Recommended by90%of homeowners
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Avatar for Gardner Services
Gardner Services
4.7(
17
)
Radon Gas - Abatement

Serving Marengo, IL and surrounding areas

Approved

In business since 1996

Free estimates

Emergency services offered

"David, at Gardner Environmental Services, professionally performed numerous air sample tests inside our home due to a minor smelling of mold in one spot.Fortunately, his lab resource came back with negative results on each location sample David tested. David was reassuring and pleasant to work with. I would recommend his company, to anyone."
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+18

Response time7 hrs
Response rate100%
12 neighbors recently requested a quote
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Avatar for Radman Radon Testing
Radman Radon Testing
5.0(
7
)
Radon Gas - Abatement

Serving Marengo, IL and surrounding areas

In business since 2020

Free estimates

Warranties offered

"RADMAN did an outstanding job installing a radon mitigation system in my home. His crew knows what they are doing and the results speak for themselves. Within hours after starting up the system my Radon level went from 20 to less than 1 Picocuurie per liter."
Response time1 day
Recommended by100%of homeowners
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Radaquest Radon Inspectors
5.0(
4
)
Radon Gas - Testing

Serving Marengo, IL and surrounding areas

In business since 2008

Free estimates

Credit card accepted

"Very easy to get an appointment on short notice when I had limited time to get a radon test done in the process of purchasing a home. Their price was also slightly lower than an estimate I'd received from another company, and the technician was more thorough about explaining the process than the other company I considered."
Response time5 hrs
Response rate87%
Recommended by100%of homeowners
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Avatar for West Suburban Inspections Inc
West Suburban Inspections Inc
5.0(
4
)
Radon Gas - AbatementRadon Gas - Testing

Serving Marengo, IL and surrounding areas

In business since 1996

Free estimates

Credit card accepted

"West Suburban Inspections Inc

West Suburban Inspections, very thorough, and did a good job.
He explained everything in simple terms."
Home Inspector License
Inspection Company License
Certified Indoor Air Consultant
Recommended by100%of homeowners
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Radon Detection and Reduction FAQs, answered by experts

Radon is a cancer-causing radioactive gas that poses serious health risks, infiltrating homes through foundation cracks and unnoticed spaces.

Yes, many systems include warranties for performance. Confirm terms with your installer.

You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.

Many radon fans carry a five-year manufacturer's warranty. That said, your radon fan should last between five and ten years. Regular inspections will ensure the fan is operating properly. Unusual or exceptional noise coming from the fan or indications on your manometer or system monitor can immediately tell you that something is amiss.

Mitigation reduces radon levels, protecting your health and complying with safety standards.

The Marengo, 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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