How much does radon testing cost?

Radon testing costs vary by property size and type and location. Contact Radon Test DMV at 202-930-1797 for a fast, free quote in Virginia, Maryland, or Washington DC.

How long does a radon test take?

A standard radon test typically runs for 48 hours of continuous monitoring, with results available shortly after the test period ends.

What radon level is considered dangerous?

The EPA recommends taking action to reduce radon when levels reach or exceed 4.0 pCi/L. Levels between 2.0 and 4.0 pCi/L may also warrant mitigation.

Why is radon testing important in real estate transactions?

Radon testing protects buyers and sellers by identifying a serious health hazard before closing. Many real estate contracts in VA, MD, and DC include a radon contingency.

Do you serve my area?

Radon Test DMV provides radon testing throughout Virginia, Maryland, and Washington DC. Call 202-930-1797 to confirm service in your location.

Radon Information Center

Radon is a naturally occurring radioactive gas that forms when uranium breaks down in soil, rock, and groundwater. It is colorless, odorless, and tasteless, which means it cannot be detected without testing.

Radon can enter homes and buildings through foundation cracks, construction joints, crawl spaces, sump pits, utility penetrations, floor drains, and gaps around pipes. Once inside, radon can accumulate, especially in lower levels and areas with limited ventilation.

Radon Education Topics

Why Radon Testing Matters

Long-term exposure to elevated radon is a serious health concern. Because radon cannot be seen or smelled, testing is the only way to know whether a home, condo, townhouse, commercial property, or new construction project has elevated radon levels.

Can Any Home Have Radon?

Yes. Any property can have elevated radon, regardless of age, size, foundation type, construction quality, or neighborhood. Two homes on the same street can have very different radon levels, so relying on a neighbor’s result is not enough.

Common Radon Entry Points

Foundation cracks
Construction joints
Crawl spaces
Sump pits and floor drains
Utility penetrations
Gaps around pipes
Basement slabs and lower-level walls

When Should You Test for Radon?

Before buying a home
Before selling a home
After major renovations
After finishing a basement or lower level
After installing or modifying a radon mitigation system
When moving into a newly constructed home
As part of routine home safety checks

What Is a Professional 48-Hour Radon Test?

A professional 48-hour radon test uses a continuous radon monitor placed in the lowest suitable livable area of the property. The monitor records hourly radon levels during the testing period and produces data that can be reviewed for average radon level, changes over time, and testing conditions.

Radon Testing for Real Estate

Radon testing is commonly used during real estate transactions. Buyers use the report to understand indoor air quality before closing. Sellers may test before listing to reduce surprises and help the transaction move more smoothly.

Professional Radon Testing in VA, MD & DC

Radon Testing DMV provides NRSB-certified 48-hour radon testing across Northern Virginia, Maryland, and Washington DC.

Contact Radon Testing DMV or view our service areas to schedule a professional radon test.