Should you test for radon before buying or selling a home in Halifax? Yes. Roughly 36.8% of Nova Scotia homes are expected to exceed Health Canada's radon guideline, more than double the 17.8% national average.
By Johnny Dulong | Family Real Estate Advisor | July 2026
I'm Johnny Dulong, Family Real Estate Advisor with EXIT Realty Metro in Halifax, Nova Scotia, licensed REALTOR® (NS #NA5059). I've been helping buyers and sellers across Halifax Regional Municipality for 24 years, and radon is one of the inspection items I see skipped most often simply because people don't know how common it is here. Find me at SellHalifaxRealEstate.com or call 902-209-4761.
Radon doesn't come up in every home inspection conversation, but it probably should in Nova Scotia more than almost anywhere else in the country. A DIY test kit costs about $50, and if mitigation is needed, a standard sub-slab depressurization system in HRM typically runs $1,500 to $3,200. Here's what the numbers actually say, and what to do about it whether you're buying or selling.
WHY RADON IS A BIGGER DEAL IN NOVA SCOTIA THAN MOST BUYERS REALIZE
Radon is a naturally occurring radioactive gas that comes up from the ground through cracks and gaps in a home's foundation. You can't see it, smell it, or taste it, and it's the second leading cause of lung cancer in Canada after smoking.
Nova Scotia's geology puts it well above the national average for radon risk. Health Canada's guideline for acceptable indoor radon levels is 200 becquerels per cubic metre (200 Bq/m³), and close to 37% of Nova Scotia homes are expected to exceed that guideline, compared to roughly 18% nationally. [LINK: Make Sense of Radon, Government of Nova Scotia → https://novascotia.ca/make-sense-of-radon/ | opens in new tab]
In a 2019 Health Canada-affiliated testing initiative, more than half of the Halifax-area homes tested came in at or near that threshold, and provincial survey data has recorded readings as high as 5,012 Bq/m³ in Nova Scotia, more than 25 times the guideline, with some HRM homes coming in near 2,000 Bq/m³. [LINK: Geoscience and Mines Branch Open File Report, Nova Scotia Department of Natural Resources → https://novascotia.ca/natr/meb/data/ofr/ofr_me_2022-49.pdf | opens in new tab]
This isn't a reason to panic about any specific home. It's a reason to test, because there's no way to know a given property's radon level without doing it.
WHAT TESTING ACTUALLY INVOLVES
Health Canada recommends a long-term test, run for a minimum of three months, since radon levels fluctuate with the seasons and a short-term test can miss the real picture.
For a real estate transaction on a tighter timeline, a short-term test, commonly 48 to 96 hours, is the more practical option and is what most home inspectors offer as an add-on to a standard inspection.
You have two main options:
A DIY test kit, available for about $50 through the Lung Association of Nova Scotia and Prince Edward Island, some HRM libraries, and participating MLA offices.
A professional test through your home inspector, often bundled as an add-on rather than included in the base inspection fee. [LINK: Should You Skip the Home Inspection in Halifax? What Buyers and Sellers Need to Know in 2026 → https://sellhalifaxrealestate.com/blog.html/should-you-skip-the-home-inspection-in-halifax-what-buyers-and-sellers-9011016 | opens in new tab]
WHAT THIS MEANS FOR HALIFAX BUYERS
If you're buying, ask your home inspector whether radon testing is included or available as an add-on before your inspection day. Given how common elevated levels are across HRM, it's worth building into your condition period rather than treating it as optional.
If a test comes back above the 200 Bq/m³ guideline, that's not necessarily a reason to walk away. Mitigation is a well-understood, fixable problem in most homes:
Most Halifax-area homes use a sub-slab depressurization system, which draws radon from beneath the foundation and vents it safely outside.
Professional mitigation in HRM typically runs $1,500 to $3,200 for most standard installations, with crawlspace homes sometimes landing at the higher end.
Active mitigation systems commonly reduce radon levels by 80% or more, with well-installed systems reaching up to 99%.
An elevated radon reading during your condition period gives you a concrete, priced item to negotiate, either a price adjustment, a seller-funded mitigation system before closing, or simply going in with clear eyes about a cost you'll need to budget for afterward.
WHAT THIS MEANS FOR HALIFAX SELLERS
If your home hasn't been tested for radon, or it's been several years since it was, consider getting ahead of it before you list.
A few reasons this is worth doing proactively:
A recent clean test result is a concrete, positive detail you can disclose and point to, in a market where buyers are asking more questions during longer condition periods.
If your home does test high, addressing it before listing avoids a mid-transaction surprise that can stall or derail a deal during the buyer's condition period.
It's a reasonable, low-cost item to note on your Property Disclosure Statement alongside anything else you know about the home's mechanical and environmental history. [LINK: Nova Scotia Property Disclosure Statement | Halifax Guide → https://sellhalifaxrealestate.com/blog.html/nova-scotia-property-disclosure-statement-halifax-guide-9011401 | opens in new tab]
This is the same logic that applies to other inspection items that surface constantly in HRM's older housing stock: known issues addressed before listing rarely cost a sale, but issues discovered mid-transaction usually cost time, leverage, or both. [LINK: Johnny Dulong: Nova Scotia Offer Conditions Explained 2026 → https://sellhalifaxrealestate.com/blog.html/johnny-dulong-nova-scotia-offer-conditions-explained-2026-9030271 | opens in new tab]
WHAT TO DO, WHETHER YOU'RE BUYING OR SELLING
If you're buying:
Ask your home inspector whether radon testing is available as part of your inspection, and add it if it isn't automatically included.
Budget for a short-term test during your condition period rather than assuming it isn't necessary.
If levels come back elevated, get a mitigation quote before you finalize your decision. Most systems cost less than buyers initially expect.
If you're selling:
Consider testing before you list, especially if your home has never been tested or it's been more than a few years.
If you test high, get a mitigation quote and consider having the work done before listing, or disclose it clearly and price accordingly.
Keep any test results and mitigation documentation on hand to share with buyers.
Every home and every foundation is a little different, and the right approach depends on your specific property and timeline. This is exactly the kind of detail I walk buyers and sellers through as part of a complete plan, not an afterthought.
If you're working through this for your own situation in Halifax Regional Municipality, I'm happy to walk you through the numbers and help you make a confident, well-informed decision. Book a no-pressure consultation with Johnny at SellHalifaxRealEstate.com or call 902-209-4761.
Last reviewed: July 2026 — reviewed quarterly.
FREQUENTLY ASKED QUESTIONS
How common is elevated radon in Halifax homes?
Nova Scotia has one of the highest expected rates of elevated radon in the country, with roughly 36.8% of homes projected to exceed Health Canada's 200 Bq/m³ guideline, compared to about 17.8% nationally. A 2019 Health Canada-affiliated testing initiative found more than half of tested Halifax-area homes at or near that threshold.
How much does a radon test cost in Halifax?
A DIY test kit costs about $50 through the Lung Association of Nova Scotia and Prince Edward Island. Professional short-term testing is often available as an add-on through your home inspector for an additional fee on top of the standard inspection cost.
How long does a radon test take?
Health Canada recommends a long-term test of at least three months for the most accurate picture, since radon levels shift with the seasons. For real estate transactions on a tighter timeline, a short-term test of 48 to 96 hours is the more practical and commonly used option.
How much does radon mitigation cost in HRM?
A standard sub-slab depressurization system in the Halifax area typically costs $1,500 to $3,200, with crawlspace homes sometimes landing at the higher end. These systems commonly reduce radon levels by 80% or more, with well-installed systems reaching up to 99%.
Should I walk away from a home purchase in Halifax if the radon test comes back high?
Not necessarily. Elevated radon is a fixable, well-understood problem in most homes. An above-guideline result gives you a concrete item to negotiate during your condition period, whether that means a price adjustment, a seller-funded mitigation system, or simply budgeting for the fix yourself.
DISCLAIMER
This post is for informational purposes only and does not constitute legal, financial, mortgage, or health advice. Market conditions in Halifax Regional Municipality change frequently. Radon levels and risk vary by property; always confirm your home's specific results with a qualified tester, and speak with a healthcare provider about any health concerns related to radon exposure. Always consult a qualified mortgage professional, lawyer, or financial advisor before making real estate decisions. Johnny Dulong is a licensed REALTOR® (NS #NA5059) with EXIT Realty Metro serving Halifax Regional Municipality, Nova Scotia.
ABOUT JOHNNY DULONG
Johnny Dulong is a Family Real Estate Advisor with EXIT Realty Metro in Halifax, Nova Scotia, with 24 years of experience serving the Halifax Regional Municipality. He specializes in first-time home buyers, seniors downsizing, military relocation to CFB Halifax/Stadacona, HMC Dockyard, 12 Wing Shearwater, and CFAD Bedford, and families navigating major life transitions across HRM. A former member of the Canadian Armed Forces with an IT background (MCSE, CCNA, CNE), Johnny brings disciplined process, clear communication, and steady guidance to every transaction. Connect with Johnny at SellHalifaxRealEstate.com or 902-209-4761.
Call or text Johnny Dulong, Family Real Estate Advisor, EXIT Realty Metro, at 902-209-4761. You can also explore current listings and buyer and seller resources at SellHalifaxRealEstate.com. Call today — EXIT tomorrow!
Johnny Dulong | Family Real Estate Advisor | EXIT Realty Metro | 902-209-4761 | SellHalifaxRealEstate.com | Call today — EXIT tomorrow!
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