Written by: Kate Holder

Category: Radon Mitigation

Published: January 4, 2025

Why Radon Mitigation is Essential

Radon is a colorless, odorless gas that can seep into your home from the ground. Since prolonged exposure to high radon levels can increase the risk of lung cancer, installing a radon mitigation system is crucial if your home tests above the EPA action level of 4 pCi/L. However, many homeowners are concerned about the cost of installing such a system. This post will break down typical radon mitigation system costs, factors affecting pricing, and tips for choosing the right contractor in Montgomery County, MD.

Factors Affecting Radon Mitigation Costs

1. Type of Foundation
   The foundation type plays a major role in determining the complexity and cost of a radon mitigation system.
   • Slab-on-grade homes: These require systems that draw radon from beneath the slab
   • Homes with basements: Systems must be designed to vent radon from beneath the basement floor
   • Crawl spaces: These often require additional sealing, soil encapsulation with 6ml plastic and ventilation, increasing the total cost.
2. Size of the Home
   Larger homes may require more extensive mitigation systems, such as multiple suction points, which can increase costs.
3. System Type The two main types of radon mitigation systems are:
   • Sub-slab depressurization (SSD): The most common and effective type, where a fan is used to draw radon from beneath the slab and vent it outside.
   • Sub-membrane depressurization: Used in homes with crawl spaces. This involves placing a plastic membrane over the crawl space and venting the radon gas.
4. Additional Costs
   • Electrical Work: If your home needs new electrical wiring for the fan, this can add $200 to $300.
   • Sealing Foundation Cracks: Sealing cracks can cost an additional $100 to $500, depending on the extent of the work.

FAQs About Radon Mitigation System Costs

1. How long does it take to install a radon mitigation system?

Installation usually takes 3 to 5 hours, depending on the size of the home and complexity of the system.

2. Will a radon mitigation system increase my energy bills?

The fan used in a radon mitigation system consumes about 90 to 150 watts, resulting in a minimal increase in your monthly energy bill—typically around $5 to $10.

3. Do radon mitigation systems require maintenance?

Yes, radon fans require periodic maintenance and eventual replacement after 5 to 10 years. You should also retest your home for radon every 2 years to ensure the system is working properly.

A Worthwhile Investment for Peace of Mind

While the cost of a radon mitigation system can seem significant, it’s a small price to pay for ensuring your family’s safety. In Montgomery County, where radon levels are often elevated, taking proactive steps to reduce radon exposure is essential. By understanding the factors that affect pricing and choosing a qualified contractor, you can install an effective system without overspending.

If you haven’t tested your home for radon yet, consider starting with an affordable radon test kit. Early detection is key to mitigating radon risks and keeping your home safe.

Radon Mitigation System Cost Breakdown

Cost Component	Description	Estimated Cost ($)
Standard SSD System	Covers homes on slabs with gravel, up to 1500 sq ft. Includes labor, materials, and post-mitigation test.	1,499
Extra Collection Point	Additional suction point required for larger or complex homes with split level foundations.	350
Radon Re-Test	Follow-up test to ensure radon levels remain below the EPA action level every 2 years	150
Electrical Work	Installation of new wiring for the radon mitigation fan, if needed.	200+
Sealing Foundation Cracks	Reducing radon entry points by sealing visible cracks.	100+
Maintenance	Regular maintenance or replacement of the radon mitigation fan every 5-20 years.	599