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Verified Reviews for Radon Detection And Reduction pros in Harmans, MD

*The Angi rating for Radon Detection And Reduction companies in Harmans, 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 Harmans, 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 December 24, 2025

Find Radon detection and reduction specialists in Harmans

Avatar for NextDay Inspect

NextDay Inspect

4.94(
316
)
•Approved Pro

NextDay Inspect

4.94(
316
)
•Approved Pro
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
17 years of experience

Our goal is to protect our clients' interest by providing a thorough and detailed inspection of the property. Safeguarding our clients' investment is our priority. We provide residential home inspections, commercial building inspections, pre-drywall inspections, radon gas testing, and mold sampling. View the rate for your home inspection and scheduling availability on our website. Home Inspectors at NextDay Inspect® are licensed by the Department of Professional and Occupational Regulation (DPOR) and the Department of Labor, Licensing, and Regulation (DLLR). Upon completing the on-site inspection the inspector will prepare a report, including photographs taken at the property, and arrows with commentary detailing the areas of concern. Specialized tools are used to ensure a thorough inspection of the properties components. Some of these tools are thermometer, moisture & humidity meter, thermal infrared camera, outlet tester. We have an A plus rating with the Better Business Bureau.

"Michael was nothing but professional, friendly, thorough, and easy to talk with!"

Bryant L on December 2025

Our goal is to protect our clients' interest by providing a thorough and detailed inspection of the property. Safeguarding our clients' investment is our priority. We provide residential home inspections, commercial building inspections, pre-drywall inspections, radon gas testing, and mold sampling. View the rate for your home inspection and scheduling availability on our website. Home Inspectors at NextDay Inspect® are licensed by the Department of Professional and Occupational Regulation (DPOR) and the Department of Labor, Licensing, and Regulation (DLLR). Upon completing the on-site inspection the inspector will prepare a report, including photographs taken at the property, and arrows with commentary detailing the areas of concern. Specialized tools are used to ensure a thorough inspection of the properties components. Some of these tools are thermometer, moisture & humidity meter, thermal infrared camera, outlet tester. We have an A plus rating with the Better Business Bureau.

"Michael was nothing but professional, friendly, thorough, and easy to talk with!"

Bryant L on December 2025

Avatar for NextDay Inspect®

NextDay Inspect®

4.90(
540
)
•Approved Pro

NextDay Inspect®

4.90(
540
)
•Approved Pro
Super Service Award
Customers say: True professional
17 years of experience
Free onsite estimate

Use code HAWarranty when scheduling for complimentary home warranties! Our goal is to protect our clients' interest by providing a thorough and detailed inspection of the property. Safeguarding our clients' investment is our priority. We provide residential home inspections, commercial building inspections, pre-drywall inspections, radon gas testing, and mold sampling. View the rate for your home inspection and scheduling availability on our website. Home Inspectors at NextDay Inspect® are licensed by DPOR and DLLR and are certified members of ASHI and InterNACHI. Upon completing the on-site inspection the inspector will prepare a report, including photographs taken at the property, and arrows with commentary detailing the areas of concern. Specialized tools are used to ensure a thorough inspection of the properties components. Some of these tools are thermometer, moisture & humidity meter, thermal infrared camera, outlet tester. We have an 'A+' rating with the Better Business Bureau.

"Very good "

myna t on December 2025

Use code HAWarranty when scheduling for complimentary home warranties! Our goal is to protect our clients' interest by providing a thorough and detailed inspection of the property. Safeguarding our clients' investment is our priority. We provide residential home inspections, commercial building inspections, pre-drywall inspections, radon gas testing, and mold sampling. View the rate for your home inspection and scheduling availability on our website. Home Inspectors at NextDay Inspect® are licensed by DPOR and DLLR and are certified members of ASHI and InterNACHI. Upon completing the on-site inspection the inspector will prepare a report, including photographs taken at the property, and arrows with commentary detailing the areas of concern. Specialized tools are used to ensure a thorough inspection of the properties components. Some of these tools are thermometer, moisture & humidity meter, thermal infrared camera, outlet tester. We have an 'A+' rating with the Better Business Bureau.

"Very good "

myna t on December 2025

Avatar for MoldGone LLC

MoldGone LLC

4.93(
812
)
•Approved Pro

MoldGone LLC

4.93(
812
)
•Approved Pro
Customers say: True professional
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
19 years of experience

MoldGone is a full service mold inspection, air quality testing, remediation, and reconstruction company with over a decade of experience. Our inspectors and technicians carry the highest and most recognized certifications in the industry. Whether your are a residential or commercial customer seeking mold testing or remediation services you can be assured that the project will be professionally managed and properly certified. There are many companies that offer mold remediation - make sure that the company you choose has an industry recognized mold remediation or inspection certification such as the American Council of Accredited Certification (ACAC) or equivalent. MoldGone is unsurpassed in its commitment to customer service excellence, provision of only the highest caliber service, and providing unsurpassed value in every project or inspection delivered. MoldGone's customers have ranged from the residential homeowner to private schools and churches. In fact, when the Sisters at a private Catholic girls school in the Washington, D.C. area needed a company to treat mold in the Sister's private archive room, complete with 100 year-old manuscripts, they entrusted MoldGone, LLC to do the project. On another project that involved removing mold from a 30 foot ceiling above a filled indoor pool, when the scaffolding company wanted several thousand dollars to build the necessary scaffold to reach the treatment area MoldGone built its own providing the customer significant savings. At MoldGone, LLC. we constantly strive to find the most cost effective way to fully address each and every mold condition. MoldGone technicians are trained specifically for mold treatment and remediation. They are also required to have construction experience since many of our projects involve demolition and reconstruction. Technicians are held to the utmost highest levels of quality with each project receiving a thorough walkthrough by management before it is deemed complete.

"Went okay"

Brandon B on September 2025

MoldGone is a full service mold inspection, air quality testing, remediation, and reconstruction company with over a decade of experience. Our inspectors and technicians carry the highest and most recognized certifications in the industry. Whether your are a residential or commercial customer seeking mold testing or remediation services you can be assured that the project will be professionally managed and properly certified. There are many companies that offer mold remediation - make sure that the company you choose has an industry recognized mold remediation or inspection certification such as the American Council of Accredited Certification (ACAC) or equivalent. MoldGone is unsurpassed in its commitment to customer service excellence, provision of only the highest caliber service, and providing unsurpassed value in every project or inspection delivered. MoldGone's customers have ranged from the residential homeowner to private schools and churches. In fact, when the Sisters at a private Catholic girls school in the Washington, D.C. area needed a company to treat mold in the Sister's private archive room, complete with 100 year-old manuscripts, they entrusted MoldGone, LLC to do the project. On another project that involved removing mold from a 30 foot ceiling above a filled indoor pool, when the scaffolding company wanted several thousand dollars to build the necessary scaffold to reach the treatment area MoldGone built its own providing the customer significant savings. At MoldGone, LLC. we constantly strive to find the most cost effective way to fully address each and every mold condition. MoldGone technicians are trained specifically for mold treatment and remediation. They are also required to have construction experience since many of our projects involve demolition and reconstruction. Technicians are held to the utmost highest levels of quality with each project receiving a thorough walkthrough by management before it is deemed complete.

"Went okay"

Brandon B on September 2025

Fidelity Home Inspections of Maryland

4.89(
54
)
•Approved Pro

Fidelity Home Inspections of Maryland

4.89(
54
)
•Approved Pro
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
35 years of experience

Home Inspections from Fidelity Home Inspections of Maryland LLC, is an easy way to invest in your home. With more than thirty years of inspection experience Bill Alderson pays attention to detail and is committed to giving you a thorough evaluation of your current home, or a property you are interested in purchasing. Communication is one of the things that sets us apart from other companies, and we take pride in being with you every step of the way. Our gratification comes from knowing every inspection is well done when we walk away from it. Please visit our website at fidelityhomeinspectionsofmaryland.com, or call(240-305-1984 between 8:00 am to 9:00 pm Monday through Friday.

"Very professional and gave a detailed report. I was up against a deadline and he accommodated my rush request."

Tia B on April 2022

Home Inspections from Fidelity Home Inspections of Maryland LLC, is an easy way to invest in your home. With more than thirty years of inspection experience Bill Alderson pays attention to detail and is committed to giving you a thorough evaluation of your current home, or a property you are interested in purchasing. Communication is one of the things that sets us apart from other companies, and we take pride in being with you every step of the way. Our gratification comes from knowing every inspection is well done when we walk away from it. Please visit our website at fidelityhomeinspectionsofmaryland.com, or call(240-305-1984 between 8:00 am to 9:00 pm Monday through Friday.

"Very professional and gave a detailed report. I was up against a deadline and he accommodated my rush request."

Tia B on April 2022

Avatar for H&G Restoration

H&G Restoration

5.00(
12
)
•Approved Pro

H&G Restoration

5.00(
12
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

At H&G Restoration, we pride ourselves on delivering high-quality results through meticulous attention to detail and a customer-centric approach. Our team of seasoned professionals brings a wealth of experience and expertise to every project, ensuring that our clients receive not only innovative solutions but also exceptional service. We understand that every customer has unique needs and visions. That’s why we offer a range of options that allow our clients to see their final product before it reaches its final destination. From concept to completion, we are dedicated to making sure that each project meets the highest standards of quality and accuracy. With a strong track record of success and a reputation for reliability, H&G Restoration continues to build lasting relationships with clients by consistently exceeding expectations and delivering outstanding results.

"Outstanding service! I could not understand why my downstairs closet was extremely cold upon entry. During my first conversation with Phillip, he conveyed concern and dedication regarding identification and remediation of the unusually cold air. During initial visit, Phillip noted portions of closet were approximately 15 degrees colder than adjoining rooms. After conducting internal and external inspections of the nearby areas, he identified potential source of cold air. A couple days later with outside temperatures in the 20s, Phillip exhaustively sealed external areas of concern. A few days later, he came again to determine temperature differential within the closet. It was now much more comfortable with temperature only a few degrees below neighboring rooms! Throughout the entire process, Phillip was very friendly and knowledgeable."

Seth F on January 2022

At H&G Restoration, we pride ourselves on delivering high-quality results through meticulous attention to detail and a customer-centric approach. Our team of seasoned professionals brings a wealth of experience and expertise to every project, ensuring that our clients receive not only innovative solutions but also exceptional service. We understand that every customer has unique needs and visions. That’s why we offer a range of options that allow our clients to see their final product before it reaches its final destination. From concept to completion, we are dedicated to making sure that each project meets the highest standards of quality and accuracy. With a strong track record of success and a reputation for reliability, H&G Restoration continues to build lasting relationships with clients by consistently exceeding expectations and delivering outstanding results.

"Outstanding service! I could not understand why my downstairs closet was extremely cold upon entry. During my first conversation with Phillip, he conveyed concern and dedication regarding identification and remediation of the unusually cold air. During initial visit, Phillip noted portions of closet were approximately 15 degrees colder than adjoining rooms. After conducting internal and external inspections of the nearby areas, he identified potential source of cold air. A couple days later with outside temperatures in the 20s, Phillip exhaustively sealed external areas of concern. A few days later, he came again to determine temperature differential within the closet. It was now much more comfortable with temperature only a few degrees below neighboring rooms! Throughout the entire process, Phillip was very friendly and knowledgeable."

Seth F on January 2022

Avatar for D & H Demolition, LLC

D & H Demolition, LLC

5.00(
11
)
•Approved Pro

D & H Demolition, LLC

5.00(
11
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
12 years of experience

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!

"Excellent job excellent people"

Denise W on June 2025

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!

"Excellent job excellent people"

Denise W on June 2025

Avatar for Guardian Basement Waterproofing

Guardian Basement Waterproofing

4.68(
19
)
•Approved Pro

Guardian Basement Waterproofing

4.68(
19
)
•Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
41 years of experience

Guardian Basement Waterproofing understands your basement waterproofing needs. We know how to detect the source of water intrusion and stop leaks before they happen. We help our customers reclaim their basements from water, mold and mildew by doing what we do best: finding and repairing the source of their water-related problems. Guardian uses only skilled and experienced technicians to do the job right the first time! As a basement waterproofing company with more than 40 years of waterproofing experience, Guardian stands behind its work with a Lifetime Guarantee. Additional phone number - (410) 484-9812.

"Avoid Guardian Basement – False Promises and Poor Customer Service Two years ago, I hired Guardian Basement to fix a water issue on the front wall of my basement. Joel came out, sold me on their system, and guaranteed I would have a dry basement. We also replaced two sump pumps and had the sump well dug deeper. The main selling point was their lifetime guarantee. Fast forward two years, and I have the exact same problem. Every time there is significant rain, water rushes through the same wall. I reached out to Guardian Basement, and Joel scheduled a time to check it out. His tone was completely different this time—defensive and dismissive. Within five minutes, he claimed, “Your system is clogged.” He made this assessment without any real inspection—just by looking at the cement floor and wall. Now, here’s the catch: If you look closely at their so-called lifetime warranty, clogs are not covered. So despite spending thousands of dollars, I’m back to square one. To make matters worse, Joel was incredibly condescending and unpleasant to deal with. After this experience, I looked into their licensing with the state of Maryland and found multiple complaints against them. I am now in the process of submitting my own complaint as well. I would never recommend Guardian Basement to anyone. Save your money and go with a company that truly knows what they are doing and stands behind their work. If I could give them a negative number of stars I would."

Kelly M on March 2025

Guardian Basement Waterproofing understands your basement waterproofing needs. We know how to detect the source of water intrusion and stop leaks before they happen. We help our customers reclaim their basements from water, mold and mildew by doing what we do best: finding and repairing the source of their water-related problems. Guardian uses only skilled and experienced technicians to do the job right the first time! As a basement waterproofing company with more than 40 years of waterproofing experience, Guardian stands behind its work with a Lifetime Guarantee. Additional phone number - (410) 484-9812.

"Avoid Guardian Basement – False Promises and Poor Customer Service Two years ago, I hired Guardian Basement to fix a water issue on the front wall of my basement. Joel came out, sold me on their system, and guaranteed I would have a dry basement. We also replaced two sump pumps and had the sump well dug deeper. The main selling point was their lifetime guarantee. Fast forward two years, and I have the exact same problem. Every time there is significant rain, water rushes through the same wall. I reached out to Guardian Basement, and Joel scheduled a time to check it out. His tone was completely different this time—defensive and dismissive. Within five minutes, he claimed, “Your system is clogged.” He made this assessment without any real inspection—just by looking at the cement floor and wall. Now, here’s the catch: If you look closely at their so-called lifetime warranty, clogs are not covered. So despite spending thousands of dollars, I’m back to square one. To make matters worse, Joel was incredibly condescending and unpleasant to deal with. After this experience, I looked into their licensing with the state of Maryland and found multiple complaints against them. I am now in the process of submitting my own complaint as well. I would never recommend Guardian Basement to anyone. Save your money and go with a company that truly knows what they are doing and stands behind their work. If I could give them a negative number of stars I would."

Kelly M on March 2025

Avatar for Baltimore Home Specs, LLC

Baltimore Home Specs, LLC

5.00(
4
)
•Approved Pro

Baltimore Home Specs, LLC

5.00(
4
)
•Approved Pro
Customers say: Quick response
Warranties offered

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.

"Chris was great. He explained everything that was checked and showed me all of the things I needed to know about the house. Would highly recommend him for anyone needing home inspection."

David M on March 2024

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.

"Chris was great. He explained everything that was checked and showed me all of the things I needed to know about the house. Would highly recommend him for anyone needing home inspection."

David M on March 2024

Mitchell Home Inspections, LLC

4.99(
86
)

Mitchell Home Inspections, LLC

4.99(
86
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Home inspections and radon testing

"Mitch was friendly as he was professional. The report was thorough and easy to understand, with excellent visuals. Could not ask for a better home inspection!"

Cory M on September 2024

Home inspections and radon testing

"Mitch was friendly as he was professional. The report was thorough and easy to understand, with excellent visuals. Could not ask for a better home inspection!"

Cory M on September 2024

Avatar for Pro Spex Home Inspection Services

Pro Spex Home Inspection Services

4.89(
333
)

Pro Spex Home Inspection Services

4.89(
333
)
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers

Serving the DMV since 2003. Locally owned, not a franchise, Super Service Award every year since 2012. We inspect any home of any size in any condition, for buyers, sellers, investors and homeowners. All Full Service Home inspections include the best protection in the industry: FREE 30 DAY HOME WARRANTY, 90 DAY BUY BACK GUARANTEE, INSPECTOR PERFORMANCE GUARANTEE. Services include (Buyers and Sellers: Full Service Home Inspections Termite Inspections Mold inspections Radon testing Underground Sewer line inspections New construction inspections (foundation, framing, Pre-drywall) Builder Warranty Inspection Rental Property Inspections Contractor Inspections 203K consulting Limited inspections (any system (Roof, Electrical, HVAC etc. or component) Deck safety inspections Well Inspections We utilize infrared cameras, moisture detection equipment and drones to benefit our clients. If you plan to invest in it, we can inspect it. Contact us today and schedule online at www.pro-spex.com or over the phone by calling 844-675-8851.

"Robert was very helpful, knowledgeable, and courteous. I sometimes felt as if he were inspecting his own home, that's how much care he demonstrated."

Gail T on May 2024

Serving the DMV since 2003. Locally owned, not a franchise, Super Service Award every year since 2012. We inspect any home of any size in any condition, for buyers, sellers, investors and homeowners. All Full Service Home inspections include the best protection in the industry: FREE 30 DAY HOME WARRANTY, 90 DAY BUY BACK GUARANTEE, INSPECTOR PERFORMANCE GUARANTEE. Services include (Buyers and Sellers: Full Service Home Inspections Termite Inspections Mold inspections Radon testing Underground Sewer line inspections New construction inspections (foundation, framing, Pre-drywall) Builder Warranty Inspection Rental Property Inspections Contractor Inspections 203K consulting Limited inspections (any system (Roof, Electrical, HVAC etc. or component) Deck safety inspections Well Inspections We utilize infrared cameras, moisture detection equipment and drones to benefit our clients. If you plan to invest in it, we can inspect it. Contact us today and schedule online at www.pro-spex.com or over the phone by calling 844-675-8851.

"Robert was very helpful, knowledgeable, and courteous. I sometimes felt as if he were inspecting his own home, that's how much care he demonstrated."

Gail T on May 2024

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Radon Detection and Reduction questions, answered by experts

Ideally, no one will live in a house with elevated radon levels, as prolonged exposure increases the risk of serious health issues like lung cancer. However, homes with radon can be made safe through mitigation systems, such as active soil depressurization. Testing for radon regularly and addressing high levels helps ensure a safe living environment.

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.

Radon is a colorless, odorless gas that can cause lung cancer; testing ensures safe indoor air quality.

Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.

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.

The Harmans, MD 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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