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*The Angi rating for Radon Detection And Reduction companies in Rockville, VA 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 Rockville, VA 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 02, 2025

Find Radon detection and reduction specialists in Rockville

Avatar for TOPS RADON
TOPS RADON
5.0(
9
)
Radon Gas - AbatementRadon Gas - Testing

Serving Rockville, VA and surrounding areas

Approved

In business since 2025

Free estimates

Offers commercial services

"Ben, I can’t thank you enough. You take pride in your work and I respect that. You worked so hard and payed attention to the smallest of details. The results speak for themselves. If you are looking for a radon mitigation system, look no further than Tops Radon. First class service from beginning to end. I cannot recommend Ben enough. God bless you Ben."
External fan
Mitigation system
Mitigation system
Mitigation system
Response time1 day
Response rate96%
2 neighbors recently requested a quote
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Avatar for HomeTeam Inspection Service of South Richmond
HomeTeam Inspection Service of South Richmond
5.0(
5
)
Radon Gas - Testing

Serving Rockville, VA and surrounding areas

In business since 2021

Small jobs welcome

Credit card accepted

"Highly Recommended! HomeTeam provides outstanding service and same day reporting. I was able to easily schedule my home, pest, water, and radon inspection on one call! During the purchase of my new home, HomeTeam provided a detailed and easy to read report. They team was excellent and answered all my questions during and after the inspection. Thank you HomeTeam for helping me to feel confident of my big ticket purchase and for being part of my Home Team!!"
Response time8 hrs
Recommended by80%of homeowners
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Avatar for All States Air Duct Pro
All States Air Duct Pro
3.1(
236
)
Radon Gas - AbatementRadon Gas - Testing

Serving Rockville, VA and surrounding areas

In business since 1995

Free estimates

Emergency services offered

"Hired vendor to perform the coupon deal.  Found mold in the unit; they tested and cleaned the unit, and duct work.  They were courteous, well informed.
"
Before & After Air Duct Cleaning
Recommended by49%of homeowners
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Avatar for Advanced Home Inspection, LLC
Advanced Home Inspection, LLC
4.4(
5
)
Radon Gas - Testing

Serving Rockville, VA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

Welcome to Advanced Home Inspection LLC! We take pride in the quality of work and customer satisfaction that we give each and every customer! We are known to pay exquisite attention to detail while making customer satisfaction our top priority. Call us today to learn more about how we can help you! \n\nCombined 100+ years experience in the housing industry as a contractors, builders, historic restoration, and inspectors. Experienced in historic and newer homes.\nWe provide instant reporting, short notice and non-traditional scheduling. Your inspection will include photos of all shut off locations, dates and typical life spans of all mechanical units, maintenance schedules, and probably a joke or two.\nFull home, prelist and pre-purchase home inspections including thermography (when necessary), all windows, all doors, all systems, all outlets, plumbing, electrical, crawl space/basement/slab, roof and more. \nPricing begins at $350 for full inspection\n$175 for addl services & walk thru

Example of estimate cost to rectify incl in report
Inspection
Inspection
Inspection
Example of estimate cost to rectify incl in report

+4

Response time7 hrs
Response rate97%
Recommended by80%of homeowners
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Radon Detection and Reduction questions, answered by experts

The cost to replace a radon fan ranges from $300 to $600 for the fan itself, with installation adding an additional $200 to $500. Overall, the total cost for replacement can range from $500 to $1,100, depending on factors such as the fan model, home size, and local labor rates. If the fan is part of a larger radon mitigation system, the price may be higher.

The cost for a radon mitigation system typically ranges from $800 to $1,500, with an average around $1,000. The final price depends on several factors, including the size of your home, the severity of the radon issue, and the type of system required. Your home's foundation type also significantly impacts the cost. For example, sealing and ventilating an unfinished basement might cost around $4,600, while encapsulating a crawl space without a foundation slab can range from $1,500 to $15,000.

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

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.

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.

The Rockville, 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.

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