Professional Radon Testing in Toronto & GTA

Name: Toronto Radon Expert
Address: 16 Mellowood Drive, North York, ON, M2L 2E3, CA
Telephone: (343) 368-6905
Price range: $$

Accurate radon testing for homeowners, home buyers, and real estate professionals. Know your radon level — and what to do about it.

Long-Term & Short-Term Tests

Following Health Canada Protocols

Same-Week Booking

For Homeowners Peace of mind for your family

For Home Buyers Fast results before closing

For Realtors Reports for listings & disclosures

For Homeowners

Is Your Home Protecting Your Family?

Radon is the leading cause of lung cancer among non-smokers in Canada. It's colourless, odourless — and the only way to know is to test.

Any home can have high radon Radon enters through foundation cracks, floor drains, and construction joints. New or old, any home can be affected.
Health Canada guideline: 200 Bq/m³ If your home tests above this threshold, a mitigation system is recommended. Roughly 7–10% of Toronto homes exceed this level.
Long-term testing is the gold standard A 91+ days continuous monitor reading gives you the most accurate annual average — the number that matters for health decisions.
Test every 2–5 years Radon levels can change after renovations, HVAC changes, or foundation shifts. Regular testing keeps your family protected.

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Cutaway diagram showing how radon gas enters a home — through soil, bedrock, foundation cracks, sumps, and well water

Testing Methods

Long-Term or Short-Term — Same Device, Different Duration

We use a calibrated continuous radon monitor for both tests. The hardware is the same — only how long it stays in your home and how the readings are summarized differ.

Long-Term Test 91+ days

✓ Most accurate · Health Canada standard

The monitor is placed in the lowest livable space of your home for at least 91 days. Hourly readings are aggregated into your annual radon average — the number that drives health-based decisions.

Accounts for seasonal variation in radon levels
Most accurate result for health-based decisions
Hourly data log for full transparency
Full written report included
Recommended by Health Canada for definitive results

Short-Term Test 48–96 hours

✓ Fast results · Real estate use

The same continuous monitor is deployed for 48–96 hours under closed-house conditions. Ideal for time-sensitive situations like real estate transactions or renovation planning.

Results in 48–96 hours
Hourly data log for full transparency
Common practice for real estate transactions
Suitable for urgent decisions
Health Canada recommends a long-term follow-up for definitive results

For Home Buyers

Don't Close Without Knowing Your Radon Level

A radon test during your conditional period gives you full information before you commit — and leverage to negotiate if levels are high.

Request it during your conditional period Include a radon test condition in your offer. We can typically schedule within 1–2 business days of your request.
48–96 hours electronic test available Our short-term electronic monitor delivers results in 48–96 hours — fast enough for most closing timelines.
High result? You have options If radon exceeds 200 Bq/m³, you can negotiate mitigation costs with the seller, or walk away with confidence.
Professional written report provided You receive a clear written report documenting the test protocol, hourly readings, and final radon level — easy to share with anyone reviewing the property.

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Short-term electronic radon monitors with digital displays — used for 48-96 hour measurements

Buyer Timeline

How It Fits Your Closing Schedule

Our process is designed around real estate timelines.

48–96 hours Test For conditional periods

✓ Most popular for buyers

We place an electronic monitor for a minimum of 48 hours under closed-house conditions. You get a written report before your conditional date.

Book Day 1, results by Day 3–4
Detailed written report with full hourly data log
Closed-house protocol followed
Available for urgent bookings — call to discuss

What If Levels Are High? Your options explained

✓ We guide you through next steps

A result above 200 Bq/m³ doesn't mean you walk away. Mitigation is effective and we'll quote your specific home.

Request the seller to mitigate before closing
Negotiate a price reduction to cover mitigation cost
Get a free mitigation estimate from us
Mitigation reduces levels by 90%+ in most homes

For Realtors

Fast, Professional Radon Reports for Your Listings

We work with real estate agents across the GTA to provide reliable radon testing that protects your clients — and your reputation.

Priority scheduling for agents Registered realtor partners get same-day or next-day booking. We understand deals move fast.
Report in 48–96 hours Our electronic tests deliver a clear, documented written report following Health Canada testing protocols — easy to share with buyers, sellers, or home inspectors.
Proactive testing builds trust Listing agents who test proactively demonstrate transparency — and attract more confident buyers.
Referral program available Agents who refer clients receive priority service and volume pricing. Contact us to set up a realtor account.

Book for a Listing Realtor Account →

A residential home being inspected through a magnifying glass — illustrating professional radon testing for real estate transactions

Why Radon Matters in Real Estate

Protect Your Clients. Protect Your Deal.

Ontario has no mandatory radon disclosure law — but buyer awareness is growing. Here's why proactive testing is smart practice.

Avoid Deal-Killing Surprises

A buyer-ordered test late in the process can derail a deal. Pre-listing tests eliminate the unknown.

Increase Buyer Confidence

A clean radon report is a selling feature. It signals a well-maintained, health-conscious home.

Protect Your Liability

As awareness grows, undisclosed radon issues can become post-sale disputes. Documentation protects all parties.

The Process

From Booking to Results

Book Online or Call

Pick a time that works. Most GTA appointments are available within 1–3 business days.
We Place the Detector

We visit your property and deploy the appropriate device in the lowest livable area.
Lab Analysis

For long-term tests, your detector is analyzed using calibrated radon measurement equipment.
Report & Consultation

You receive a full written report. If levels are elevated, we walk you through your options at no additional cost.

Pricing

Every Home Is Different — So Is Every Quote

Radon testing costs depend on your home's size, location, and timeline. Rather than a one-size-fits-all price list, we provide a personalized quote after a quick conversation — no commitment required, no pressure.

Call or text us A quick 5-minute call is all it takes. We'll ask a few questions about your home and give you a clear, honest quote on the spot.

Email us anytime Prefer to write? Send us a quick note with your address and what you're looking for — we'll respond within one business day.

Book online Use our online booking form and we'll follow up to confirm details and provide your quote before the appointment.

(343) 368-6905 Get a Free Quote

F.A.Q.

Radon Testing Questions

Common questions about radon testing in Toronto homes.

Where should the radon detector be placed?

Radon detectors should be placed in the lowest livable area of your home — typically the basement or ground floor. The room should be used regularly (at least 4 hours per day). Avoid placing detectors in bathrooms, kitchens, laundry rooms, or near windows and exterior doors.

Do I need to be home during the test?

For long-term tests, you simply leave the monitor in place for 91+ days — no disruption to your daily life. For short-term tests (real estate timelines), closed-house conditions must be maintained for 12 hours before and during the test. We'll walk you through the requirements when we book.

What does the radon test report include?

Your report includes the measured radon concentration in Bq/m³, the test duration and location, the full hourly data log from the monitor, comparison to Health Canada's 200 Bq/m³ guideline, and recommended next steps.

My previous test showed low radon. Do I need to test again?

Health Canada recommends retesting every 2–5 years, or after any major renovations, HVAC upgrades, or changes to your basement. Radon levels can shift over time as your home settles and foundation conditions change. A previous low result is not a permanent guarantee.

Can I buy a radon test kit myself instead?

Consumer-grade radon kits are available, but placement errors and improper handling are common — leading to inaccurate results. Our professional placement ensures the monitor is correctly positioned, the closed-house protocol is followed, and the readings are interpreted properly. For real estate timelines, a professionally administered test is typically expected.