How Much Does Radon Mitigation Cost?

The short answer: most homeowners in Maryland and Pennsylvania pay between $800 and $1,500 for a standard radon mitigation system. The national average is approximately $1,200.

This price typically includes everything: diagnostic evaluation, drilling the suction point, PVC piping from below the slab to above the roofline, the radon fan, sealing of visible cracks, a U-tube manometer for system monitoring, and cleanup. A reputable contractor should provide an all-inclusive quote with no surprise charges.

Radon Mitigation Cost by System Type

Different homes require different approaches. Here’s what each type of system typically costs:

Sub-Slab Depressurization — $800 to $1,500

This is the most common system and the one most Maryland and Pennsylvania homes receive. A fan and pipe draw radon from beneath the concrete slab and vent it above the roof. Most installations fall in the $1,000 to $1,300 range.

Sub-Membrane Depressurization (Crawl Spaces) — $1,000 to $2,000

Homes with dirt-floor crawl spaces require a sealed membrane over the soil before the depressurization system can work. The membrane and additional sealing add to the cost.

Drain Tile Suction — $800 to $1,500

If your home has an existing interior or exterior drain tile system, a contractor may be able to connect the radon fan directly to it. This can sometimes reduce costs since less drilling and piping is needed.

Block Wall Suction — $1,000 to $2,000

Hollow concrete block foundations may require depressurization of the block wall cavities in addition to (or instead of) sub-slab suction. This adds complexity and cost.

Multiple Suction Points — $1,500 to $2,500

Large homes, homes with complex foundation layouts, or homes with very high radon levels may need two or more suction points. Each additional suction point adds $300 to $600.

Heat Recovery Ventilator (HRV) — $1,500 to $3,000

HRVs are less common and typically used as a supplement rather than a primary mitigation method. They’re most appropriate for moderately elevated levels.

What Affects the Price?

Several factors determine where your home falls within the cost range:

Foundation Type

Homes with full basements and poured concrete slabs are the most straightforward to mitigate. Crawl spaces, slab-on-grade construction, and homes with mixed foundation types (part basement, part crawl space) often cost more.

Home Size and Layout

Larger homes or homes with complex floor plans may need multiple suction points or longer pipe runs, which increase material and labor costs.

Number of Suction Points

A standard single-point system handles most homes. Larger homes, homes with interior footer walls that create separate sub-slab zones, or homes with extremely high radon levels may need two or more points.

Pipe Routing

Interior pipe routing (through closets, utility rooms, or garages) is typical. If interior routing isn’t practical, an exterior installation runs the pipe along the outside wall and up above the roofline. Exterior installations may cost slightly more due to additional weatherproofing.

Radon Level

Homes with extremely high radon levels (above 20 pCi/L) may require a higher-capacity fan or additional suction points to achieve adequate reduction.

Accessibility

A clean, accessible basement with clear access to the slab is the easiest scenario. Finished basements, limited access crawl spaces, or cluttered work areas can increase installation time and cost.

What’s Included in the Price?

A quality radon mitigation quote should include all of the following:

Diagnostic evaluation of your home’s foundation and radon entry points

Core drilling through the slab (one or more suction points)

PVC piping from below the slab to above the roofline

Radon fan (rated for your home’s specific needs)

Sealing of visible cracks and openings in the foundation

U-tube manometer (system monitor gauge)

Electrical connection for the fan

Cleanup of the work area

A written warranty covering parts, labor, and performance

Ask your contractor specifically what’s included before signing. A low bid that excludes crack sealing or doesn’t include a performance guarantee may not be the best value.

Ongoing Costs After Installation

Radon mitigation systems have minimal ongoing costs:

Electricity: The fan runs 24/7 and costs approximately $50 to $150 per year in electricity, depending on the fan size and local utility rates.

Fan replacement: Radon fans typically last 7 to 12 years. Replacement costs $200 to $400 including labor.

Follow-up testing: The EPA recommends retesting every 2 years. DIY test kits cost $15 to $30. Professional tests cost $125 to $250.

Total annual operating cost: approximately $75 to $175 per year for most homeowners.

Is Radon Mitigation Worth the Cost?

Consider the math. The average radon mitigation system costs $1,200 and lasts the life of the home (with periodic fan replacements). Radon is the second leading cause of lung cancer, responsible for approximately 21,000 deaths per year in the U.S.

For comparison, homeowners routinely spend more on cosmetic kitchen updates, landscaping, or a single appliance replacement. Radon mitigation is one of the few home improvements that directly protects your family’s health.

From a resale perspective, a home with a documented radon mitigation system is easier to sell than one with a known radon problem and no system. Many real estate transactions in Maryland and Pennsylvania include radon testing as part of the inspection, and a pre-existing system eliminates a common negotiation hurdle.

Radon Mitigation Cost in Maryland

Maryland homeowners typically pay $800 to $1,500 for standard mitigation. Frederick County, western Maryland, and parts of central Maryland have the highest radon levels and the most active mitigation market.

Maryland does not require state certification for radon professionals, so prices are set by the open market. This makes it especially important to get quotes from certified (NRPP or NRSB) contractors who can demonstrate quality workmanship.

Radon Mitigation Cost in Pennsylvania

Pennsylvania homeowners typically pay $900 to $1,500 for standard mitigation — slightly higher than the national average due to the prevalence of older homes with complex foundations.

Pennsylvania requires all radon mitigation contractors to hold state certification through the PA DEP (7000-series certification). This regulatory requirement adds accountability but can also mean slightly higher base prices due to licensing and insurance requirements.

The Harrisburg, Lancaster, York, Reading, and Lehigh Valley areas have particularly high demand for mitigation services due to elevated radon levels across the region.

How to Get the Best Price

A few tips for getting a fair deal on radon mitigation:

Get at least two quotes from NRPP- or NRSB-certified contractors. Avoid contractors who quote without seeing your home — a proper evaluation matters.

Ask what’s included. The lowest price isn’t always the best value if it excludes crack sealing, a performance guarantee, or proper fan sizing.

Check reviews and references. A contractor with strong Google reviews and a track record of successful installations is worth a small premium.

Don’t pay the full amount upfront. A typical payment structure is a deposit (if any) with the balance due upon completion and satisfactory post-mitigation test results.

Or let us do the work for you — RadonSafetyGuide.com connects you with one certified, pre-screened professional. One form, one call, no bidding wars.

Test Before You Mitigate

Before investing in mitigation, confirm your radon levels with a reliable test:

Airthings Corentium Home 2 — Continuous digital monitor. Know your exact levels before and after mitigation to verify the system is working. (~$180)

SunRADON Lüft — Wi-Fi enabled with app monitoring and alerts. Designed to pair with radon mitigation systems. (~$169–$199)

Buy from SunRADON — use code HEALTHYAIR for a discount

Buy direct from Airthings — save 10% with code RADONSAFETY-10OFF | Also available on Amazon

First Alert Radon Gas Test Kit, RD1 — Affordable short-term test to confirm whether your home needs mitigation. (~$15)

As an Amazon Associate, RadonSafetyGuide.com earns from qualifying purchases. We also participate in the Airthings affiliate program.

Get a Free Radon Mitigation Quote

Fill out the 60-second form below and a certified radon professional will call you — typically within 15 minutes during business hours.

State-Specific Cost Guides

For detailed pricing in your state, see our dedicated guides:

• Radon Mitigation Cost in Maryland — Frederick County, western MD, I-270 corridor pricing

• Radon Mitigation Cost in Illinois — Chicago suburb pricing by city

• Radon Mitigation Cost in Pennsylvania — Harrisburg, Lancaster, York, Gettysburg pricing

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Frequently Asked Questions About Radon Mitigation Cost

Get a Radon Mitigation Cost Estimate in Your Area

Radon mitigation costs vary by location, foundation type, and home size. Get a free quote from a certified professional in your area:

Frederick, MD · Hagerstown, MD · Thurmont, MD · Middletown, MD · Gaithersburg, MD · Rockville, MD · Westminster, MD · Boonsboro, MD · Brunswick, MD · Walkersville, MD

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