ENVIRONMENTAL TESTING · RADON

Radon Testing You Can Watch Happen — and Trust When It's Done

Radon is invisible, odorless, and the leading cause of lung cancer among non-smokers. We test homes across Maryland, DC and Northern Virginia with the connected BREEZE continuous radon monitor — so your results are tamper-checked, hour-by-hour, and in your inbox the moment the test ends.

Schedule a Radon TestCall (240) 900-3208

Certified Master Inspector® | IAC2 Radon Certified | NRPP-Certified Device | 90-Day Radon Warranty Included

4.0

pCi/L — EPA action level

1 in 15

U.S. homes estimated at or above it

48 hr

minimum closed-house test

Hourly

readings, not one average

UNDERSTANDING THE RISK

What is radon — and how does it get inside?

Radon is a naturally occurring radioactive gas produced as uranium in the soil breaks down. It moves up through the ground and slips into homes through foundation cracks, sump pits, utility penetrations and gaps around pipes. Once inside, the house holds it in, and levels can build.

It doesn't matter whether a home is new or old, drafty or energy-efficient, with or without a basement. Radon can also enter through private well water, though soil gas is the most common path. Several Maryland counties sit in the EPA's highest radon-potential zone, and neighboring homes can test very differently. The only way to know a home's level is to test it.

Where we test

The monitor is placed in the lowest livable level of the home — usually a finished basement or the main floor above a crawlspace or slab — away from drafts, exterior walls, humidity sources and sunlight.

Closed-house conditions

Windows and exterior doors stay closed (normal entry and exit is fine) starting 12 hours before and throughout the test. Whole-house fans and fireplaces should not be used. Normal heating and cooling can run. We send a simple checklist to the seller or occupant when you book.

WATCH · 1 MINUTE

Your radon checkup, explained

A quick look at what radon is, why the Surgeon General and EPA recommend testing, and how a DS Home Inspection radon test helps keep your family safe.

Where radon comes from and how it gets inside
Why every home should be tested
What to do to keep your family safe

WHAT SETS US APART

We test with the all-new BREEZE continuous radon monitor

Many radon tests still use a charcoal canister that sits for two days, gets mailed to a lab, and comes back as a single number days later. We invested in BREEZE — a professional, NRPP-certified continuous radon monitor that's connected from setup to report. Here's what that means for you:

THE EQUIPMENT WE USE

BREEZE continuous radon monitor — NRPP-certified device

Hour-by-hour readings

You see how radon rises and falls through the test — not just one averaged number — so a spike or a pattern is easy to understand.

Built-in tamper detection

The monitor records movement and environmental changes throughout the test and flags anything that could compromise the result. Every report is documented and defensible.

Full environmental profile

Temperature, humidity and barometric pressure are logged alongside radon, so you can see whether conditions during the test were normal.

Results the moment the test ends

Cellular, Wi-Fi and Bluetooth connectivity send data to the cloud as it's collected. Your report is generated automatically at completion — no waiting for a pickup or a lab.

High sensitivity

At 45+ counts per hour per pCi/L, BREEZE is among the most sensitive monitors in the industry, giving short-term readings more confidence.

Always in calibration

Our monitors are replaced with freshly calibrated units every year, and if signal drops mid-test, data keeps recording and syncs once reconnected — nothing is lost.

Why this matters in a real estate deal: radon results often decide whether a buyer asks for mitigation. A continuous, tamper-checked test with a clear hourly record gives buyers, sellers and agents a result everyone can stand behind — and gets it to you fast enough to keep the contingency timeline on track.

SIDE BY SIDE

How a BREEZE test compares

Not all radon tests are equal. Here's what you get from our connected monitor versus common alternatives.

Feature	DS HOME INSPECTION BREEZE Connected Monitor	Typical Monitor	Charcoal Canister
Hourly radon readings	✔ Yes	Yes	No — single average
Tamper & movement detection	✔ Yes	Varies	No
Temperature, humidity & pressure log	✔ Yes	Varies	No
Live monitoring during the test	✔ Yes	Limited or no	No
Problem flagged before test ends	✔ Yes	Rarely	No
Device pickup needed for report	✔ No	Yes	Mailed to lab
Report delivery	✔ Automatic at completion	After pickup & upload	Days after lab receipt

THE PROCESS

How your radon test works

1

Book & prep

Schedule on its own or add it to your home inspection. We send closed-house instructions to the occupant so conditions start 12 hours before setup.

2

Place & monitor

We place the BREEZE monitor in the lowest livable level and start the test. It runs a minimum of 48 hours while we watch readings and conditions in real time.

3

Report & next steps

Your report — average level, hourly graph and environmental data — is delivered automatically when the test ends. We walk you through what it means and whether mitigation makes sense.

PRICING

Simple, upfront radon pricing

Every radon test includes our BREEZE continuous monitor, a full report, and our 90-day radon warranty at no additional cost.

BEST VALUE

Added to a Home Inspection

$225

Add radon testing to your Standard Residential or First-Time Home Buyer inspection for $225.

BREEZE continuous radon monitor
Minimum 48-hour test with hourly data
Tamper & environmental monitoring
Automatic report at test completion
90-day radon warranty included

Add to My Inspection

Standalone Radon Test

$275

+ mileage may apply

BREEZE continuous radon monitor
Minimum 48-hour test with hourly data
Tamper & environmental monitoring
Automatic report at test completion
90-day radon warranty included

Schedule Radon Test

Radon testing is already included in our Peace of Mind Bundle and Nook & Cranny Inspection bundle. If you've booked either one, there's nothing extra to add.

Pair it with other environmental services:

Already own the home? Ask about Radon Long-Term Monitoring for a year-round picture of your levels.

INDOOR AIR QUALITY TESTING BUNDLE

IAQ Bundle Options

Radon is one pollutant. Our IAQ bundles cover the rest. A radon test answers one question. Our Indoor Air Quality testing measures particulates, chemical gases, allergens and mold spores against an outdoor control sample, with HVAC filter and duct checks and remediation recommendations. Each bundle pairs IAQ with radon in one visit, and steps up to mold, asbestos and lead dust for homes that need them.

PM2.5 & PM10
Formaldehyde (HCHO)
TVOCs
Air Quality Index
43 allergen & particle types
Mold spores
Temperature & humidity

Was your home built before 1978?

1978 is the federal lead-paint cutoff, and older homes often contain asbestos materials too. Use this to pick a bundle:

Allergy or asthma concerns, no moisture issues: Essential Air
Most buyers and homeowners: Complete Air
Built before 1978: Older Home Air

START HERE

Essential Air

Allergy or asthma concerns, no known moisture problems.

$799

Stand-alone price · mileage may apply

Separately $874 · Save $75

Indoor Air Quality Testing
Radon Testing (BREEZE monitor)
Complete Mold Inspection
Asbestos Sampling
Lead Dust Sampling

Book Essential Air

Complete Air

The full picture for most buyers and homeowners.

$999

Stand-alone price · mileage may apply

Separately $1,174 · Save $175

Indoor Air Quality Testing
Radon Testing (BREEZE monitor)
Complete Mold Inspection + Mold Safe Warranty
Asbestos Sampling
Lead Dust Sampling

Book Complete Air

BUILT BEFORE 1978

Older Home Air

Everything in Complete Air, plus asbestos and lead dust.

1 asbestos sample / 3 samples · Recommended

$1,599

Stand-alone price · mileage may apply

Separately $1,873 · Save $274

Indoor Air Quality Testing
Radon Testing (BREEZE monitor)
Complete Mold Inspection + Mold Safe Warranty
Asbestos Sampling (3 samples)
Lead Dust Sampling (10 samples)

Book Older Home Air

IAQ bundles are booked as stand-alone services; mileage may apply. Additional IAQ/mold samples $45 each. Lab results in 2–3 business days. Lead dust uses 10 representative wipe samples across standard rooms (basement counted as one room). Homes over 3,000 sq ft and unfinished areas may incur additional charges with your approval. Full IAQ details →

LEARN MORE

Why every home should be tested

Radon testing is quick, affordable, and gives you information you can act on. If levels are high, mitigation systems are a proven fix — and knowing before closing gives you options.

Want to see what you'll receive? Browse our sample reports.

FAQ