Certified Radon Testing for Real Estate Transactions in the Fraser Valley

If you’re buying or selling a home in the Fraser Valley and a radon test is part of the purchase conditions — or if you’re a seller who wants to test before listing — here’s exactly what BC Radon Control provides and how the process works.

BC Radon Control is C-NRPP certified for radon measurement and mitigation throughout the Fraser Valley. The certified report from a C-NRPP measurement technologist is what satisfies purchase condition requirements, not a DIY kit.

The 96-Hour Short-Term Test

For real estate transactions, the accepted test under C-NRPP standards is a short-term test of at least 96 hours using a commercial-grade continuous electronic monitor.

What’s included:

• Tamper-evident continuous monitor placed in the lowest livable level of the home
• Closed-home conditions documented for the full test period
• Hourly readings recorded throughout the 96-hour minimum window
• A signed report from a certified C-NRPP measurement technologist
• Results accepted for purchase conditions by realtors, buyers’ agents, and lenders

A mail-in alpha track test or consumer radon detector does not meet real estate standards. Only a certified report from a C-NRPP professional satisfies a realtor or lender reviewing a purchase condition.

Closed-Home Conditions: What Sellers and Listing Agents Need to Know

For the test to be valid, the home must be in closed-home conditions throughout the 96-hour test period:

• Exterior doors and windows kept closed except for brief normal entry and exit
• HVAC systems operating on normal settings — no exhaust-only or open-window ventilation
• The test device must not be moved once placed

Sellers and listing agents are responsible for maintaining these conditions during the test. BC Radon Control provides written instructions at device placement and follows up on any questions.

Timeline: Booking to Report

Step	Typical Timeline
Booking confirmed	Same day or next day
Device placement	Within 1–3 business days
Closed-home period	96 hours (4 days)
Device pickup and lab processing	1–2 days
Certified report delivered	2–5 days after pickup
Total from booking to report	5–8 business days

Buyers writing a subject-to-radon-test condition should allow 7–10 days to be safe, particularly if placement needs to be scheduled around showings.

Reading the Report

The report shows a radon concentration in Bq/m³. Health Canada’s guideline is 200 Bq/m³ — the level above which mitigation is recommended.

Result	What it means
Under 100 Bq/m³	Well below Health Canada’s guideline
100–200 Bq/m³	Below the action level; buyer may accept or request credit
200–600 Bq/m³	Above the action level; mitigation typically requested
Over 600 Bq/m³	Significantly elevated; immediate action expected

Short-term tests are a point-in-time snapshot. Results near 200 Bq/m³ in either direction warrant careful interpretation. For a full explanation of how to use radon results in a BC real estate transaction — including disclosure obligations, budgeting for mitigation, and seller strategy — see our complete guide to radon and real estate in BC.

Service Area

BC Radon Control provides real estate radon testing throughout the Fraser Valley:

Abbotsford · Chilliwack · Langley · Mission · Maple Ridge · Hope · Aldergrove · White Rock

We schedule tests quickly for active transactions and work with listing agents and buyers’ agents directly when needed.

Book Your Test

Contact BC Radon Control for a free quote on a certified real estate radon test. Tell us the address, the closing timeline, and whether you’re the buyer or seller — we’ll confirm availability and get testing scheduled.

Get a Free Quote →

For information on our full range of testing options — including long-term residential tests — visit our radon testing services page.