Top-rated radon detection and reduction specialists.

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Avatar for NextDay Inspect®

NextDay Inspect®

4.90(
534
)
Approved Pro

NextDay Inspect®

4.90(
534
)
Approved Pro
Customers say: True professional
147 local quotes requested
17 years of experience

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.

"Matt was punctual in fact he arrived earlier than us, he went through the whole property and took some time to show me specific spaces in the house that require attention and answer the questions I had, he was very polite, respectful and knowledgeable."

Oscar M on November 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.

"Matt was punctual in fact he arrived earlier than us, he went through the whole property and took some time to show me specific spaces in the house that require attention and answer the questions I had, he was very polite, respectful and knowledgeable."

Oscar M on November 2025


RDV Environmental Services

4.87(
112
)
Approved Pro

RDV Environmental Services

4.87(
112
)
Approved Pro
Customers say: Quality work
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
19 local quotes requested

With 10 years experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We welcome your questions and thank you for your interest.

"Quick, efficient, clean installation. Professional and transparent about pricing"

Justin H on November 2024

With 10 years experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We welcome your questions and thank you for your interest.

"Quick, efficient, clean installation. Professional and transparent about pricing"

Justin H on November 2024


Avatar for Restoration 1 of Centreville

Restoration 1 of Centreville

5.00(
4
)
Approved Pro

Restoration 1 of Centreville

5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
48 local quotes requested

Restoration 1 Offers Water Damage, Fire Damage, and Mold Remediation Services. Proudly Serving Centreville and Surrounding Areas. Our Certified Technicians work with ALL insurance carriers Water can wreak havoc on your property if not dealt with quickly. The same thing happens with fire and smoke and mold. If your property has been affected by a natural disaster, a hidden leak, a burst pipe, or a fire, contact Restoration 1 of Centreville. We offer comprehensive restoration services. Our team members are trained and certified by the Institute of Inspection, Cleaning, and Restoration Certification (IICRC) and the Indoor Air Quality Association (IAQA). We are also licensed and insured with years of experience and a reputation for professionalism and craftsmanship. We provide reconstruction, remodeling, sanitation, and other services designed to help you get back home as quickly as possible. We’re here to help you get your life back. Don’t hesitate to call us at (877)Water-16 877-928-3716 for the help you need during this time in Manassas, Fairfax, Chantilly, Clifton, or a surrounding area.

"Restoration 1 of Centerville is the ONLY company I would use and TRUST when it comes to water leaks and damage. Georg and his team Bassam and Preston came ASAP. Georg explained what options we have if we used insurance or paid out of pocket. They helped me understand the process of getting the basement dry without creating mold! He told us the pros and cons of whether we should keep our carpet or remove it to save money and resolve the water damage as quickly as possible. They made a VERY stressful situation, seem pain free! THANK YOU!! I am so grateful for their professional services, kindness and Communication of eta when they will be arriving to my home. My basement is now ALL dry and safe from mold!! I highly recommend Restoration 1 of Centerville!"

Teri M on May 2025

Restoration 1 Offers Water Damage, Fire Damage, and Mold Remediation Services. Proudly Serving Centreville and Surrounding Areas. Our Certified Technicians work with ALL insurance carriers Water can wreak havoc on your property if not dealt with quickly. The same thing happens with fire and smoke and mold. If your property has been affected by a natural disaster, a hidden leak, a burst pipe, or a fire, contact Restoration 1 of Centreville. We offer comprehensive restoration services. Our team members are trained and certified by the Institute of Inspection, Cleaning, and Restoration Certification (IICRC) and the Indoor Air Quality Association (IAQA). We are also licensed and insured with years of experience and a reputation for professionalism and craftsmanship. We provide reconstruction, remodeling, sanitation, and other services designed to help you get back home as quickly as possible. We’re here to help you get your life back. Don’t hesitate to call us at (877)Water-16 877-928-3716 for the help you need during this time in Manassas, Fairfax, Chantilly, Clifton, or a surrounding area.

"Restoration 1 of Centerville is the ONLY company I would use and TRUST when it comes to water leaks and damage. Georg and his team Bassam and Preston came ASAP. Georg explained what options we have if we used insurance or paid out of pocket. They helped me understand the process of getting the basement dry without creating mold! He told us the pros and cons of whether we should keep our carpet or remove it to save money and resolve the water damage as quickly as possible. They made a VERY stressful situation, seem pain free! THANK YOU!! I am so grateful for their professional services, kindness and Communication of eta when they will be arriving to my home. My basement is now ALL dry and safe from mold!! I highly recommend Restoration 1 of Centerville!"

Teri M on May 2025


Avatar for NextDay Inspect

NextDay Inspect

4.94(
313
)
Approved Pro

NextDay Inspect

4.94(
313
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
499 local quotes requested

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.

"The inspection taught us a lot about the house and the inspector was very knowledgeable."

Sumitha V on November 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.

"The inspection taught us a lot about the house and the inspector was very knowledgeable."

Sumitha V on November 2025


Avatar for MoldGone LLC

MoldGone LLC

4.87(
964
)
Approved Pro

MoldGone LLC

4.87(
964
)
Approved Pro
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
650 local quotes requested

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


Homebrella Inspection Services

No reviews yet

Homebrella Inspection Services

No reviews yet

With Homebrella Inspection Services, you can rest easy knowing that you've chosen the right home inspector. We work exclusively for you, to serve your best interests and to arm you with the information you need. We hold ourselves to a high standard of ethics and professionalism to provide you with a comprehensive, unbiased report on the condition of your home. We are a Veteran Owned/Operated Business. We specialize in realty transaction home inspections, walk and talks, new residential, thermal imaging, and radon testing. About me: I chose to work in this industry because I have previous experience combined 14 years of new construction plumbing, construction building, and remodeling combined give me insight as to what I'm looking at and my ability to communicate to my clients..

With Homebrella Inspection Services, you can rest easy knowing that you've chosen the right home inspector. We work exclusively for you, to serve your best interests and to arm you with the information you need. We hold ourselves to a high standard of ethics and professionalism to provide you with a comprehensive, unbiased report on the condition of your home. We are a Veteran Owned/Operated Business. We specialize in realty transaction home inspections, walk and talks, new residential, thermal imaging, and radon testing. About me: I chose to work in this industry because I have previous experience combined 14 years of new construction plumbing, construction building, and remodeling combined give me insight as to what I'm looking at and my ability to communicate to my clients..


Avatar for HomeTeam Inspection Service

HomeTeam Inspection Service

5.00(
9
)

HomeTeam Inspection Service

5.00(
9
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

HomeTeam is a national home inspection franchise with over 1 million home inspections since 1993. We are the first in northern Virginia, established in 2015. The owner is a service-connected disabled veteran from the US Air Force. We use a team of inspectors and get the job done quickly and efficiently. We serve the northern Virginia area with 3 teams that work 7-days-a-week. We provide Radon testing, Pest/WDI inspections and other services like mold testing and air quality testing, as well as pool/spa inspections. HomeTeam is Virginia licensed and insured. We are also ASHI Certified Inspectors. We employ English, Spanish, and Korean speaking inspectors.

"Tom and his crew were very professional. They are very responsible and responsive. I highly recommend them"

Horacio A on October 2018

HomeTeam is a national home inspection franchise with over 1 million home inspections since 1993. We are the first in northern Virginia, established in 2015. The owner is a service-connected disabled veteran from the US Air Force. We use a team of inspectors and get the job done quickly and efficiently. We serve the northern Virginia area with 3 teams that work 7-days-a-week. We provide Radon testing, Pest/WDI inspections and other services like mold testing and air quality testing, as well as pool/spa inspections. HomeTeam is Virginia licensed and insured. We are also ASHI Certified Inspectors. We employ English, Spanish, and Korean speaking inspectors.

"Tom and his crew were very professional. They are very responsible and responsive. I highly recommend them"

Horacio A on October 2018


Avatar for Radon Defense

Radon Defense

No reviews yet

Radon Defense

No reviews yet
Free onsite estimate

Certified Radon Gas Testing, Mitigation, Maintenance Services provided throughout Northern Virginia. Radon Defense is a locally owned and operated company Providing Solutions for ALL Radon Needs. We employ the latest in technology, tools, supplies and equipment. Our services are provided to all Homeowners, Home buyers, Home sellers, Real Estate Agents and Home Inspectors.

Certified Radon Gas Testing, Mitigation, Maintenance Services provided throughout Northern Virginia. Radon Defense is a locally owned and operated company Providing Solutions for ALL Radon Needs. We employ the latest in technology, tools, supplies and equipment. Our services are provided to all Homeowners, Home buyers, Home sellers, Real Estate Agents and Home Inspectors.


Licensed Home Inspection company operating in DC, MD, and VA


Pillar to Post Home Inspectors

5.00(
3
)

Pillar to Post Home Inspectors

5.00(
3
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We offer professional home inspection services in Northern Virginia. We work with home buyers, home sellers, and real estate professionals. We understand that our clients are making one of the most important purchases of their lives. They aren’t just buying a house they are investing in a home, and a future. They want knowledgeable, thorough, and above all diligent professionals who go the extra mile. Our inspectors don’t merely catalog deficiencies but educate home buyers on their individual home in easily understandable language and terms. We answer questions at the time of inspection and long after it’s over. When you schedule a home inspection with Pillar To Post you’ve purchased a continuing commitment not just the most comprehensive report in the industry.

"The approach to home inspection provided by Matt differentiates him from others. He takes the “if you see something, say something” approach no matter how minor it may be. He sets expectations up front and let’s you know plan. Then he executes the plan. Upon completion, he walks you through the results and ensures you are aware. The report provided pictures and a detailed description of findings. Overall, it was a very pleasant experience."

Michael C on August 2019

We offer professional home inspection services in Northern Virginia. We work with home buyers, home sellers, and real estate professionals. We understand that our clients are making one of the most important purchases of their lives. They aren’t just buying a house they are investing in a home, and a future. They want knowledgeable, thorough, and above all diligent professionals who go the extra mile. Our inspectors don’t merely catalog deficiencies but educate home buyers on their individual home in easily understandable language and terms. We answer questions at the time of inspection and long after it’s over. When you schedule a home inspection with Pillar To Post you’ve purchased a continuing commitment not just the most comprehensive report in the industry.

"The approach to home inspection provided by Matt differentiates him from others. He takes the “if you see something, say something” approach no matter how minor it may be. He sets expectations up front and let’s you know plan. Then he executes the plan. Upon completion, he walks you through the results and ensures you are aware. The report provided pictures and a detailed description of findings. Overall, it was a very pleasant experience."

Michael C on August 2019

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Radon Detection and Reduction questions, answered by experts

The soil beneath your house is most likely what’s causing an increased level of radon. This is because soil holds radioactivity for a long time and it’s also what most buildings are built on. Another common source of radon is water from a source that hasn’t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.

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

Using an air purifier in your home or basement isn't an effective way to reduce or mitigate radon. Radon is an inert gas, meaning it doesn't react with other chemicals and can't be filtered the way particulates can be. While an air purifier can help improve your indoor air quality in other ways, don't rely on it to reduce radon.

Keeping radon from getting into your home is much better than having to get rid of it once it's already indoors. While there may not be a way to fully prevent radon from getting into your home, there are things you can do to reduce the gas's ability to enter. 

Sealing foundation cracks and openings can help keep the gas from seeping inside. Improving air flow, such as by opening windows, can also be helpful. If you're building your home from scratch, talk to your contractor about using radon-resistant construction to keep the gas out.

Testing every 2-5 years or upon adjusting occupancy or structural changes maintains safe environments.

The Potomac Falls, VA 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.