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County Large Home Inspections
4.5(
58
)

Serving Upper Marlboro, MD and surrounding areas

Approved

In business since 1999

Free estimates

Customers say: Quick response

"Ted Riddick did an excellent job of performing a mold test in our basement, at the buyers request. I was very leary at first, because we recently cleaned the carpets and were concerned and/or confused that mold could be in our basement. We certainly would have known if we had mold in our basement or water coming causing a mold situation. Needless to say no mold was found, and my worries were alleviated. Mr. Riddick is a seasoned inspector, with a deep knowledge all areas of home inspections. He was professional, kind, did a great job."
Response time10 mins
Recommended by90%of homeowners
Avatar for H&G Restoration
H&G Restoration
5.0(
13
)

Serving Upper Marlboro, MD and surrounding areas

Approved

In business since 2018

Emergency services offered

Small jobs welcome

"H&G is fantastic - extremely professional, timely, and by far the best bang for your buck. I was able to talk directly to the owner and easily schedule an emergency appointment for that same day. Mr. Garvin himself came out the the property to locate and treat standing water and mold in our crawl space and kitchen and conduct an air quality test. He worked hard and quickly to identify and fix the issue, didnâ t overcharge for anything unneeded, and even took the time to be sure we understood exactly what he was doing. Overall I appreciated their urgency, care and precision. Iâ ll be using H&G from now on!"
Response time1 day
Response rate96%
Recommended by100%of homeowners
Avatar for Vespene Radon Testing
Vespene Radon Testing
5.0(
1
)

Serving Upper Marlboro, MD and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"I used Vespene Radon Testing earlier this year and was very satisfied with the experience from start to finish. They were punctual, professional, and very knowledgeable on all things radon testing. Results came back quickly, which mattered to me as a parent of a young child. Having reliable data in hand promptly gave me confidence that our home was safe. I would definitely use them again for any of my radon testing needs ."
Radon Test Equipment
1 neighbors recently requested a quote
Avatar for Adam Contracting
Adam Contracting
4.5(
171
)

Serving Upper Marlboro, MD and surrounding areas

Approved

In business since 2008

Emergency services offered

Warranties offered

"Outstanding experience throughout the spectrum of repairs.  We were exceptionally pleased with overall costs and quality of workmanship.  Justin's crew was very professional and went above and beyond to clean the work areas at the end of each day.  Justin was always accessible via phone and email for questions that we had.
Great experience -- we'll definitely use Adam Contracting again in the future!
"
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+32

3 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for D & H Demolition, LLC
D & H Demolition, LLC
5.0(
11
)

Serving Upper Marlboro, MD and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"Work team was polite, on time every day and highly professional. They explained the process in detail and kept us informed during each phase. I highly recommend D&H."
Additional Photos
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+9

Response time8 hrs
7 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for 911 Restoration by Germain Brothers LLC
911 Restoration by Germain Brothers LLC
New to Angi

Serving Upper Marlboro, MD and surrounding areas

Approved

In business since 2016

Free estimates

Warranties offered

At 911 Restoration by Germain Brothers LLC, we specialize in comprehensive disaster restoration services. Our team is dedicated to safeguarding homes and businesses from the damaging effects of mold, water, fires and storms. Here’s what sets us apart:\n\nMold Remediation: Our certified experts assess and isolate mold contamination, ensuring thorough removal and preventing further spore spread. We identify the root cause, devise effective solutions, and prioritize your safety.\nWater Removal and Storm Damage Restoration: When water wreaks havoc due to storms or other incidents, we’re here to help. Our 24/7 emergency response team swiftly tackles water extraction, drying, and structural repairs.\n\nComprehensive Services: Beyond mold and water remediation, we handle storm and fire damage repairs, as well as basement flood cleanup\nChoose 911 Restoration by Germain Brothers LLC for reliable, efficient, and compassionate restoration services. We’re committed to restoring peace of mind and protecting your property.

3 neighbors recently requested a quote
Avatar for Atlantic Radon
Atlantic Radon
5.0(
63
)

Serving Upper Marlboro, 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."
High Performance Radon Mitigation System
High Performance Radon Mitigation System
High Performance Radon Mitigation System
Installation of exhaust
Response time8 hrs
Response rate88%
Recommended by100%of homeowners
Avatar for Mid Atlantic
Mid Atlantic
4.9(
18
)

Serving Upper Marlboro, MD and surrounding areas

In business since 1985

Free estimates

Emergency services offered

"Chris was WONDERFUL! I just purchased a home and wanted to have a mold inspection done for peace of mind. Chris took time to explain the process and put my fears at ease with his vast knowledge. He reviewed the test results with me prior to closing which gave me the peace of mind I needed to confirm I was making a good purchase and great investment. I highly recommend Mid Atlantic Commercial Residential Real Estate Solutions. VERY PROFESSIONAL AND COURTEOUS!!"
Crawl Space
Crawl Space
Crawl Space
Crawl Space
Recommended by100%of homeowners
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FAQs for radon detection and reduction projects in Upper Marlboro, MD

If radon is present in your home, you can expect to pay around $1,000 for a radon mitigation system or between $780 and $1,250 in most cases. The exact price will depend on the severity of the radon leak, home size, and the protocol the radon specialist develops to remove radon from your home and keep it out. Your foundation type will also affect your radon mitigation system cost, as unfinished basements will cost about $4,600 to seal and ventilate, while crawl spaces without a foundation slab may need extra encapsulation, costing $1,500 to $15,000.

You can buy DIY radon test kits from a home improvement store and conduct radon testing, but these tests are often inaccurate. No matter the result, you should supplement DIY testing with professional radon detection and analysis. DIYers only have access to passive radon tests, which aren’t as reliable as active tests that professionals use. Plus, it’s very easy for DIYers to make mistakes during testing, leading to inaccurate results. If you’re moving into a new home, have concerns about radon, or are due for an updated test, hire a professional. 

Radon testing costs depend on whether you hire a professional radon inspector or DIY test. You can expect to pay $150 to $800 to hire a local radon inspector, and home-testing kits range in price from $15 to $250 from home improvement stores. However, it’s best to trust a professional inspector with this task to ensure accurate results. Plus, if you have radon in your home, your testing company can develop a mitigation protocol to keep you and your family safe from the dangerous gas, so it’s well worth the money to hire a professional.

Yes, radon testing is absolutely necessary if you suspect the presence of this hazardous gas, and the Environmental Protection Agency (EPA) recommends testing for all homes in the country. Radon is a pervasive natural gas that can leak through your home’s foundation and seep into the living areas. Unfortunately, the gas is highly carcinogenic and is the second leading cause of lung cancer. Radon testing is crucial for keeping you and your family safe from harm, so hire a radon mitigation specialist to test your home if you suspect its presence in your home.

In most states, radon testing companies don’t need to be licensed or certified by the state, but the companies that analyze the test results and develop radon mitigation protocols do. You should choose a radon testing company that suits your needs, but before hiring a mitigation specialist, check our state licensing tool to make sure the company is properly certified.

The Upper Marlboro, 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.