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County Large Home Inspections
4.5(
58
)

Serving Largo, 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 Largo, 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 Largo, 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 Largo, MD and surrounding areas

Approved

In business since 2008

Emergency services offered

Warranties offered

"Working with Justin and Adam Contracting was painless and the quality of work and timely completion of the job is commendable. Communications were great; they were always on time and if there was going to be a delay we were promptly notified. But most importantly is their integrity. There was a room which needed ceiling drywall repair that we had forgotten was part of the original estimate. Several days after we had paid the final invoice, we got a call from Justin stating they had forgotten to do the drywall repair in the room in question. They promptly set up a time at our earliest convenience and the repairs were made and the room looks great. Will definitely use Adam Contracting again and they are highly recommended."
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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 Largo, 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 Largo, 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 Largo, 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 Largo, 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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Radon Detection and Reduction questions, answered by experts

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

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.

No level of radon is technically safe, but since it is naturally present everywhere, it is impossible to avoid entirely. The average radon level in homes across the United States is 1.3 picocuries per liter (pCi/L). The Environmental Protection Agency (EPA) recommends taking action to reduce radon levels if your home's test results are between 2 and 4 pCi/L or higher.

A homeowner can install a radon mitigation system on their own. But it’s a challenging DIY that requires a lot of knowledge about radon mitigation as well as familiarity with local regulations. You do not want to risk an improper installation that leaves the system unable to detect radon or gives it a shortened life span. Relying on a professional is the surest way to guarantee a successful installation.

Radon is the number one non-smoking cause of lung cancer in the United States, but it can cause some other concerning side effects in the meantime. If you have a raspy voice, chest pains, trouble breathing, difficulty swallowing, or any of the above, don’t hesitate to perform radon testing and install a mitigation system as soon as possible.

The Largo, MD homeowners’ guide to radon detection and reduction services

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