ExamPassLatent vs Patent Defect in Ontario Real Estate
In Ontario real estate, a patent defect is a problem that a reasonable inspection would reveal, such as a visible crack, a sagging floor, or a water-stained ceiling, while a latent defect is hidden and would not be revealed by a reasonable inspection, such as a concealed structural fault behind a finished wall. The distinction decides responsibility: buyers are expected to find patent defects through their own inspection, under the principle of buyer beware, whereas a latent defect that is known and makes the property dangerous or unfit to live in must be disclosed to buyers. A latent defect serious enough to trigger that duty is a material latent defect.
| Aspect | Patent defect | Latent defect |
|---|---|---|
| Visibility | Revealed by a reasonable inspection | Hidden from a reasonable inspection |
| Who must find it | The buyer, through their own inspection | The buyer cannot, so a known serious one must be disclosed |
| Disclosure trigger | Generally none, buyer beware applies | A known dangerous or uninhabitable latent defect must be disclosed |
This page pairs with material fact vs material latent defect, which goes deeper on the disclosure side.
What is a patent defect?
A patent defect is one that is visible or reasonably discoverable on an ordinary inspection of the property. Cracked tiles, a clearly sloping floor, missing railings, or obvious water damage are patent: a buyer exercising reasonable care, often with a home inspector, could find them. Ontario follows the principle of buyer beware for patent defects, which puts the risk of discovering them on the buyer, and a seller is generally not obliged to point out what an inspection would plainly show. This is exactly why a competent buyer inspection matters.
What is a latent defect?
A latent defect is hidden: it would not be revealed by a reasonable inspection because it is concealed, internal, or otherwise not observable. A cracked foundation behind finished drywall, a chronic seepage problem that leaves no trace between episodes, or unsafe wiring buried in a wall can all be latent. Because a buyer cannot protect themselves against what they cannot see, the law treats serious known latent defects differently from patent ones.
Who is responsible for each, and what must be disclosed?
For patent defects, the buyer carries the burden of discovery through inspection. For latent defects, the answer depends on seriousness and knowledge. A latent defect that renders the property dangerous, potentially dangerous, or unfit for habitation, and that is known, must be disclosed. Under O. Reg. 567/05, section 22.2, a registrant who knows of a latent defect that the seller is legally obligated to disclose must disclose it to every buyer who expresses an interest in the property, and the seller's underlying obligation comes from the common law. The Code of Ethics reinforces this: a registrant must act with honesty, integrity, and good faith toward every person (O. Reg. 365/22, section 1) and must make best efforts to ensure representations are accurate and not misleading, and must not engage in misrepresentation (O. Reg. 365/22, section 5). Leaving a known serious latent defect undisclosed runs against those duties. A hidden defect serious enough to engage these duties is a material latent defect, covered in depth in material fact vs material latent defect.
What does a latent vs patent defect look like in practice?
A buyer tours a detached home. In the garage, the concrete floor is visibly heaved and cracked, and a basement storage room shows an obvious brown stain across the ceiling. Those are patent: the buyer's inspection should catch them, and the buyer can investigate or negotiate. What the buyer cannot see is that the rear foundation wall was underpinned two years ago after a serious settlement failure, the repair is now concealed behind new framing and drywall, and it has begun to move again. The seller knows. That hidden, dangerous condition is a material latent defect, and the credited course of action is disclosure to interested buyers, not silence. The visible stains are the buyer's to chase; the concealed, failing foundation is the seller's side to disclose.
How does the exam test latent vs patent defects?
Questions usually mix a visible issue with a hidden one and ask what you must do. The visible issue is a distractor that points toward buyer beware; the hidden, serious, known issue is the one that triggers disclosure. Wrong options typically treat a known material latent defect as something to mention only if asked, or treat a patent defect as something the seller had to volunteer. Sort each fact into patent or latent, then route the duty accordingly.
How do you practise this distinction?
Classification plus routing is a skill that sharpens with feedback. ExamPass questions repeatedly ask you to separate patent from latent and to place the disclosure duty correctly, and every option is explained. When a scenario is murky, the AI Tutor can apply the rule to the exact facts in front of you. Related reading: material fact vs material latent defect and TRESA exam prep.
This guide is a study aid and a plain-language summary, not legal advice. The current text of TRESA and its regulations is always the final authority. ExamPass is an independent study aid. It is not affiliated with or endorsed by RECO, Meazure Learning, Humber Polytechnic, Career College Group, Fleming College, Algonquin College, or any other education provider. Provider and exam names are used only to identify the courses students are preparing for.