Top-rated radon gas testers.

Get matched with top radon gas testers in Wilmington, DE

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Radon gas testers in Wilmington

Avatar for In and Out Home Inspections, LLC

In and Out Home Inspections, LLC

4.86(
85
)
Approved Pro

In and Out Home Inspections, LLC

4.86(
85
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
58 local quotes requested

Here at, In and Out Home Inspections, LLC, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"Our inspector did an excellent job with inspecting the home. He proved to be knowledgeable and offered recommendations for improvements."

Maurice on October 2025

Here at, In and Out Home Inspections, LLC, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"Our inspector did an excellent job with inspecting the home. He proved to be knowledgeable and offered recommendations for improvements."

Maurice on October 2025


"Excellent work!"

Chuck R on February 2024

Lawson Home Services is the one that gets it done. We are professionals and will solve your radon problems quickly. From start to finish we are working to reduce your radon levels by doing the job correctly. Give us a call today.

"Excellent work!"

Chuck R on February 2024


Avatar for Bioclean

Bioclean

5.00(
30
)
Approved Pro

Bioclean

5.00(
30
)
Approved Pro
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
47 local quotes requested

24 HR Service for Water, Mold & Fire Damage in the Philadelphia Area. In business since 2003, we are committed to excellence in restoring homes and commercial buildings in the Philadelphia Area. Certifications in Water Restoration by IICRC, Mold Testing & Air Quality Testing. Cleaning services include, Carpet, Area Rugs & HVAC System.

"Tim was great. Punctual, explained the whole process, and was very personable. Would highly recommend!"

Chris Q on November 2024

24 HR Service for Water, Mold & Fire Damage in the Philadelphia Area. In business since 2003, we are committed to excellence in restoring homes and commercial buildings in the Philadelphia Area. Certifications in Water Restoration by IICRC, Mold Testing & Air Quality Testing. Cleaning services include, Carpet, Area Rugs & HVAC System.

"Tim was great. Punctual, explained the whole process, and was very personable. Would highly recommend!"

Chris Q on November 2024


"Very professional, knowledgeable, courteous and very customer focused. Would definitely use their services again!"

Chris A on November 2023

Full service Radon testing and mitigation, air duct and dryer vent cleaning, and blown-in attic insulation company. We service the entire state of Delaware and eastern Maryland.

"Very professional, knowledgeable, courteous and very customer focused. Would definitely use their services again!"

Chris A on November 2023


Avatar for The Radon Bros

The Radon Bros

5.00(
4
)
Approved Pro

The Radon Bros

5.00(
4
)
Approved Pro
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
121 local quotes requested

The Radon Bros is a certified provider specializing in radon testing, mitigation, and system repairs for homes, businesses, and schools across Pennsylvania, Delaware, and Maryland. They also offer mold testing and comprehensive indoor air quality assessments to ensure safer living and working environments. The company provides tailored solutions, including radon system installation and expert consultations for contractors, with a commitment to safety, health, and air quality.

"Went well"

Kenneth H on July 2025

The Radon Bros is a certified provider specializing in radon testing, mitigation, and system repairs for homes, businesses, and schools across Pennsylvania, Delaware, and Maryland. They also offer mold testing and comprehensive indoor air quality assessments to ensure safer living and working environments. The company provides tailored solutions, including radon system installation and expert consultations for contractors, with a commitment to safety, health, and air quality.

"Went well"

Kenneth H on July 2025


Avatar for Chadds Ford Climate Control, Inc.

Chadds Ford Climate Control, Inc.

4.77(
13
)

Chadds Ford Climate Control, Inc.

4.77(
13
)
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers

WELCOME TO CHADDS FORD CLIMATE CONTROL! Chadds Ford Climate Control offers a broad range of skilled services to create a more comfortable, productive, and rewarding home and work environment. We promote superior efficiency, convenience, and accessibility through proven effective equipment and procedures. Our certified technicians bring you safe and viable solutions to the design/build, retrofit, maintenance, and repair of all types of heating and cooling systems, including ductless and geothermal, air quality improvements, thermostats, back up generators, water heaters, and electrical and plumbing services.

"Everything was Great, Very Professional Company.Would Hire again."

Ed P on December 2020

WELCOME TO CHADDS FORD CLIMATE CONTROL! Chadds Ford Climate Control offers a broad range of skilled services to create a more comfortable, productive, and rewarding home and work environment. We promote superior efficiency, convenience, and accessibility through proven effective equipment and procedures. Our certified technicians bring you safe and viable solutions to the design/build, retrofit, maintenance, and repair of all types of heating and cooling systems, including ductless and geothermal, air quality improvements, thermostats, back up generators, water heaters, and electrical and plumbing services.

"Everything was Great, Very Professional Company.Would Hire again."

Ed P on December 2020


Basement Flood Cleanup Crum Lynne PA 4842452656

No reviews yet

Basement Flood Cleanup Crum Lynne PA 4842452656

No reviews yet
Free onsite estimate

Whether you have a flood or an unexpected leak, at Basement Flood Cleanup Crum Lynne PA we fully understand the urgency of getting the water out as soon as possible. That’s why we offer 24-hour emergency water damage response – because the sooner we get the water out, the less flood damage you’ll suffer. The worst water damage occurs when water has been standing for more than 48 hours, which means fast response is essential when water damage occurs. An experienced Basement Flood Cleanup Crum Lynne PA specialist can pump the water from your home and save your flooring and cabinets! Our services are offered around the clock so whether disaster strikes or a pipe bursts, take action! Contact and save your home while saving money as well.Basement Flood Cleanup Crum Lynne PA Basement Flood Cleanup Crum Lynne PA Basement Flood Cleanup Crum Lynne PA Basement Flood Cleanup Crum Lynne PA Basement Flood Cleanup Crum Lynne PA Basement Flood Cleanup Crum Lynne PA Mold Removal Mold Remediation Mold Inspection Flood Damage Repair Flood Damage Cleanup Flood Damage Restoration Water Damage Restoration Water Damage Cleanup Basement Flood Cleanup Basement Water Removal Fire Damage Restoration Smoke Damage Restoration Mold Removal Mold Removal Mold Removal Mold Removal Mold Removal Mold Removal Mold Removal Mold Removal

Whether you have a flood or an unexpected leak, at Basement Flood Cleanup Crum Lynne PA we fully understand the urgency of getting the water out as soon as possible. That’s why we offer 24-hour emergency water damage response – because the sooner we get the water out, the less flood damage you’ll suffer. The worst water damage occurs when water has been standing for more than 48 hours, which means fast response is essential when water damage occurs. An experienced Basement Flood Cleanup Crum Lynne PA specialist can pump the water from your home and save your flooring and cabinets! Our services are offered around the clock so whether disaster strikes or a pipe bursts, take action! Contact and save your home while saving money as well.Basement Flood Cleanup Crum Lynne PA Basement Flood Cleanup Crum Lynne PA Basement Flood Cleanup Crum Lynne PA Basement Flood Cleanup Crum Lynne PA Basement Flood Cleanup Crum Lynne PA Basement Flood Cleanup Crum Lynne PA Mold Removal Mold Remediation Mold Inspection Flood Damage Repair Flood Damage Cleanup Flood Damage Restoration Water Damage Restoration Water Damage Cleanup Basement Flood Cleanup Basement Water Removal Fire Damage Restoration Smoke Damage Restoration Mold Removal Mold Removal Mold Removal Mold Removal Mold Removal Mold Removal Mold Removal Mold Removal


Carmen General Contracting

No reviews yet

Carmen General Contracting

No reviews yet
45 years of experience

Free Estimates Licensed and Insured

Free Estimates Licensed and Insured


Avatar for Damage Clean Up Crew & Construction LLC

Damage Clean Up Crew & Construction LLC

1.00(
2
)

Damage Clean Up Crew & Construction LLC

1.00(
2
)
19 years of experience

Our firm provides 24/7 Insurance Restoration Services

Our firm provides 24/7 Insurance Restoration Services


Avatar for Water Damage Squad

Water Damage Squad

4.30(
10
)

Water Damage Squad

4.30(
10
)
Customers say: Super punctual
14 years of experience

Water damage, smoke, fire,restoration, mold remediation, and basement water proofing services. Residential and commercial services, we accept calls around the clock, licensed and insured.

Water damage, smoke, fire,restoration, mold remediation, and basement water proofing services. Residential and commercial services, we accept calls around the clock, licensed and insured.

...
Showing 1-10 of 442
FAQs for radon gas testing projects in Wilmington, DE

Radon is the second leading cause of lung cancer in the U.S. The gas seeps through cracks in foundations and collects in basements and other low areas. Once you breathe it in, radioactive particles lodge in lung tissue and do long-term damage. Because you can’t see or smell radon, the EPA recommends testing your home every two years—and after major renovations—to keep your family safe.

Yes—every home should be tested. The EPA advises doing it at least every two years and any time you remodel, buy, or sell. On average, one in 15 houses nationwide sits above the recommended limit, and the only way to know where yours stands is a formal test. The equipment simply measures gas levels and won’t change your indoor environment, so the process is completely harmless.

Certified radon professionals—often home inspectors or dedicated radon mitigation contractors—handle testing. These radon testing professionals follow EPA protocols and use calibrated instruments to check levels throughout your house. Hiring a certified radon specialist means results you can trust for real estate deals, insurance requirements, and, most importantly, your family’s health.

Inspectors specialize in measuring radon gas levels, while licensed mitigation contractors design and install the systems that remove it. If your test comes back high, your inspector can point you to a qualified mitigation pro who will size and install the right fan, piping, or other equipment to bring levels down.

No—standard home air purifiers don’t touch radon. They’re built to trap dust and pollen, not radioactive gas. If testing shows high levels, you’ll need a dedicated mitigation system that vents the gas from beneath your home to the outdoors. Relying on a room purifier alone won’t keep your indoor air safe.

Opening a few windows in your home might dilute radon for a short time, but the gas seeps back in as soon as they’re closed. For a lasting fix, you’ll need a professional mitigation system—often a sub-slab depressurization fan—that pulls radon from beneath the foundation and safely vents it outside.

The Wilmington, DE homeowners’ guide to radon gas testings

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