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Best radon detection and reduction specialists near Sycamore, IL

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

Avatar for Stuedemann Radon Resolutions
Stuedemann Radon Resolutions
4.7(
273
)
Radon Gas - Abatement

Serving Sycamore, 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."
New sump pump lid installation
Caulking around the sump pump cover
Caulking around the exterior Radon fan
Radon fan on exterior of home
Radon fan on exterior of home

+11

Recommended by99%of homeowners
Avatar for Bull's Eye Home Inspection
Bull's Eye Home Inspection
4.8(
28
)
Radon Gas - Testing

Serving Sycamore, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Small jobs welcome

"Matt is great! He did an extremely detailed home inspection and explained things throughout the process. He is very friendly and professional. I will definitely use Bulls Eye Home Inspection again!"
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
Avatar for Gardner Environmental Services
Gardner Environmental Services
4.8(
265
)
Radon Gas - Abatement

Serving Sycamore, IL and surrounding areas

Approved

Super Service Award Winner

In business since 1993

Free estimates

Emergency services offered

"Dave Gardner set us up with an appointment in only two days for installation of a radon mitigation system. Daveâ  s son, Jordan, and his team were very professional, courteous, friendly, honest, and informative in going over their â  game planâ  for our installation system. Our radon level went from 8.9 pre-mitigation, to .4 post-mitigation when we had the test done one week later. Jordan informed us about what he was doing during the installation. We have already referred Gardner Environmental Services to family and friends who also need radon mitigation systems."
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+20

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

Serving Sycamore, 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
Avatar for Radman Radon Testing
Radman Radon Testing
5.0(
7
)
Radon Gas - Abatement

Serving Sycamore, 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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Radon Detection and Reduction FAQs, answered by experts

The cost to replace a radon fan ranges from $300 to $600 for the fan itself, with installation adding an additional $200 to $500. Overall, the total cost for replacement can range from $500 to $1,100, depending on factors such as the fan model, home size, and local labor rates. If the fan is part of a larger radon mitigation system, the price may be higher.

Options include sub-slab depressurization, crawlspace ventilation, and sealing cracks. Choose based on home construction and radon levels.

Mitigation can take several days depending on home setup, equipment accessibility, and achieving effective diffusion system sealed efficiency.

No level of radon is technically safe, but since it is naturally present everywhere, it is impossible to avoid entirely. The average radon level in homes across the United States is 1.3 picocuries per liter (pCi/L). The Environmental Protection Agency (EPA) recommends taking action to reduce radon levels if your home's test results are between 2 and 4 pCi/L or higher.

While DIY testing is possible, abatement generally requires professional installation to ensure efficacy and meet safety standards.

The Sycamore, 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.