*The Angi rating for Radon Detection And Reduction companies in Catonsville, MD 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 Catonsville, MD 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 30, 2026
Serving Catonsville, MD and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
"Steve was easy to work with and they did an outstanding job installing the Radon Remediation system. Quick response with outstanding service. I highly recommend them. Radon levels were 4.6 before the install and .5 after the install."
+2
Serving Catonsville, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2008
Free estimates
Emergency services offered
"Excellent Water/Well Testing Service from NextDay Inspect – Highly Recommend! I recently had a water/well test done by NextDay Inspect, and I couldn’t be more satisfied with the entire process. From scheduling the appointment to receiving the results, everything was seamless and professional. Sonya, the inspector who came out, was amazing. She was punctual, thorough, and took the time to explain the entire testing process. She made sure I understood what was being tested and why, which gave me confidence in the results. The whole experience was smooth and stress-free, and I really appreciated how well everything was organized. The results were delivered quickly, and NextDay followed up to make sure I had all the information I needed. I can confidently say that NextDay Inspect provides top-tier service, and I highly recommend them for anyone needing water/well testing."
+738
Serving Catonsville, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2008
Free estimates
Emergency services offered
"Called right away to give me all info on their company and what Radon Gas testing is and the process. Set up appointment and came within 24hrs."
+378
Serving Catonsville, MD and surrounding areas
Approved
In business since 1990
Free estimates
Customers say: Quick response
"I contacted Fidelity Home Inspections of Maryland to inspect my roof. Mr. Alderson arrived on time. He was very professional. Answered all of the questions I had prior to the inspection and gave me a verbal critique after the inspection. As he promised I received a detailed written report via email within 24 hours."
+4
Serving Catonsville, MD and surrounding areas
Approved
In business since 1999
Free estimates
Customers say: Quick response
"Mr. Riddick was very professional and thorough. The report and his recommendations were very helpful in the decisions I made moving forward after receiving the mold test results."
Serving Catonsville, MD and surrounding areas
Approved
In business since 2002
Free estimates
Emergency services offered
"Jerry provided excellent service for our air mold test. He was prompt in scheduling the appointment and arrived at the property as planned. After conducting the test, we received the results in just two days, which thankfully turned out negative."
Serving Catonsville, MD and surrounding areas
Approved
Warranties offered
Credit card accepted
Customers say: True professional
Home inspection company that covers the house from top to bottom. Covering from the roof to the basement and / or crawl space. Nothing is left un turned. Also, specialize in radon, mold, and lead testing. Former Level II Thermaligist (infrared scanning). I can do it all. I am also certified through the Baltimore city and county to conduct rental inspection.
Serving Catonsville, MD and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
Leading the industry by providing a comprehensive service to residential & commercial clients in need of selective & structural demolition , hazardous material abatement and disposal , as well as mold remediation services. Call or click for your FREE estimate today!\n
+9
Serving Catonsville, MD and surrounding areas
In business since 2017
Free estimates
"Tommy, Paul and crew did an excellent job with my radon remediation and installation of a new attic stairs. They tailored the exhaust piping for my radon removal so the only thing that showed was the exhaust vent, which they painted to blend in with the roof. The test results after remediation was only 0.4 pCi/l. The very low results is a testimony for their outstanding work. They were very friendly and accommodating. They always strived to exceed my exceptions, which they did. I highly recommend Atlantic Radon."
Serving Catonsville, MD and surrounding areas
In business since 1998
"Needed Radon unit installed as part of home sale. Mike was responsive and fairly priced. Explained everything thoroughly and completed work on time. Highly recommend."
From average costs to expert advice, get all the answers you need to get your job done.
The cost of a radon mitigation system in Baltimore, MD, depends mostly on the type of system being installed. Use this guide to learn about your options.
The cost of a radon mitigation system in Washington, D.C., depends mostly on the type of system being installed. Use this guide to learn about your options.
Find out the average radon testing cost in Washington, D.C. Learn what you can expect to pay for local indoor air quality testing to keep your home safe.
Radon is a gas that you can't see or smell and is harmful to your health. If your home has radon, you need to know who installs radon mitigation systems.
Knowing how to test for radon will keep your home free and safe from this odorless gas—you just have to decide whether to do it yourself or hire a pro.
What is radon testing? Radon testing measures the presence and concentration of radon gas within indoor environments. Read on to learn more.
