Material latent defect
The BrokerFold Team — Product + Engineering
Last reviewed
A material latent defect is a serious problem with a property that a reasonable inspection would not reveal — and the category of flaw a seller cannot lawfully sit on. It is the sharp edge of caveat emptor: Canadian law lets a seller stay silent about plenty, but not about hidden defects they know make the place dangerous, uninhabitable, or radically more expensive than it appears.
Patent vs latent
The distinction that organizes everything is visibility. A patent defect is discoverable by ordinary inspection — the cracked window, the sagging fence, the stained ceiling. Those are the buyer’s problem to find, which is what inspections and subject clauses are for. A latent defect is hidden from reasonable inspection — the buried oil tank, the foundation crack behind finished drywall, the septic system that fails every spring. Latency alone doesn’t trigger a duty; the defect must also be material, and the seller must actually know about it. Nobody is liable for a problem they honestly never discovered.
BC’s bright line
BC is the province that wrote the term into its rulebook. Under the Real Estate Services Act rules administered by BCFSA, licensees must disclose known material latent defects in writing before an offer is accepted, and the guidance frames the category concretely: defects that make a property dangerous or potentially dangerous, unfit to live in, unfit for the buyer’s known purpose, prohibitively expensive to repair, or tangled in municipal non-compliance — work done without required permits being the classic case. The duty belongs to the licensee as well as the seller: an agent instructed to keep quiet about a known material latent defect cannot comply and keep acting. A property disclosure statement asks about many of the same subjects, but the disclosure duty exists with or without the form.
Ontario’s version
Ontario reaches a similar destination through common law plus the ethics regime under TRESA. There is no prescribed disclosure form in common use; instead, sellers must disclose known latent defects that render a property dangerous or unfit for habitation, active concealment can turn a sale into a fraud claim that survives closing, and registrants are obliged to determine and disclose material facts about a trade at the earliest practical moment. The vocabulary is looser than BC’s, the litigation more fact-by-fact — but the operating rule for an agent is identical in both provinces: if you know about a serious hidden problem, the only safe move is written disclosure, early. What a seller “got away with” is a story buyers tell their lawyers.
Frequently asked questions
Is a leaky basement a material latent defect?
It depends on visibility and severity. Staining a buyer's inspector would find is patent — buyer beware applies. Water ingress the seller knows about but has painted over, serious enough to threaten habitability or demand major repair, sits squarely in material-latent territory and must be disclosed.
Do sellers have to disclose a death in the home?
Stigmas — a death, a crime, a rumoured haunting — are generally not material latent defects, because they don't affect the physical state of the property. Practice differs on volunteering them, but a direct question must still be answered honestly; lying about a stigma is its own problem.
Keep reading
- Property disclosure statement The PDS is BC's standard seller disclosure form — what it covers, what it can't replace, and how it becomes part of the purchase contract.
- TRESA TRESA is Ontario's Trust in Real Estate Services Act — the law governing agents and brokerages, whose 2023 phase rewrote representation and offer rules.
- BCFSA BCFSA is the BC Financial Services Authority — the Crown regulator that licenses BC agents and brokerages and enforces conduct and advertising rules.