Hidden Defects: Your Rights as a Buyer in Quebec

The Legal Warranty Against Hidden Defects

Under article 1726 of the Quebec Civil Code, every seller owes the buyer a legal warranty against hidden defects: a serious flaw that was not apparent at the time of sale, existed before the transaction, and could not reasonably have been detected during a normal inspection. This can include recurring water infiltration, a structural problem, pyrite, mold hidden behind a wall, or non-compliant electrical work concealed from view.

For a defect to legally qualify as a hidden defect, four conditions must be met: it must be serious, hidden, pre-existing the sale, and unknown to the buyer. A hidden defect legal expertise report from a qualified professional is often the central piece of evidence in court.

Your Rights as a Buyer

If a hidden defect is confirmed, you have several possible remedies: cancellation of the sale with full reimbursement, a price reduction proportional to the cost of repairs, or damages if the seller knew of the defect and concealed it in bad faith. The remedy you pursue depends on the severity of the defect and your objectives.

Deadlines You Must Respect

The law requires you to act diligently: you must notify the seller in writing within a reasonable time after discovering the defect, generally a matter of weeks, before pursuing any legal action. The general prescription period for filing a claim is three years from the discovery of the defect, but waiting always weakens your case.

The Decisive Role of the Pre-Purchase Inspection

A thorough residential inspection at the time of purchase remains your best protection: it documents the building's condition before the transaction and can make the difference between a genuinely hidden defect and an apparent one the buyer should have noticed. Courts take the buyer's level of diligence into account.

A Reality Across the Whole Region

Whether your property is in Montreal, Laval, the South Shore, or Sherbrooke, the same Civil Code rules apply. Older homes in central boroughs raise different issues than newer construction in Laval, but in every case, solid technical evidence remains essential.

Hidden Defect vs. Apparent Defect: A Crucial Distinction

An apparent defect is one a reasonably careful buyer could have detected through a careful examination, with or without an expert's help; it generally gives no grounds for a remedy after the sale. A hidden defect, by contrast, escapes that examination even when it is diligent. That is why courts place so much weight on evidence that the buyer exercised reasonable care before the transaction, notably through a professional inspection.

The Special Case of New Homes

For a new property, a separate regime generally applies through the mandatory warranty plan for new residential buildings, which covers certain defects for set periods after delivery. That regime does not, however, fully replace the legal warranty against hidden defects for items it does not cover.

Can a Seller Waive the Warranty

A seller may try to exclude the legal warranty against hidden defects through a clause stating the property is sold without legal warranty, at the buyer's own risk. That clause is not absolute, however: it does not protect a seller who knew of the defect and failed to disclose it in good faith. Courts closely examine the circumstances of the sale before giving full effect to such a clause.

If You Suspect a Hidden Defect

Do not carry out any repairs before having the defect assessed by an expert: fixing it too early can destroy essential evidence. Read our article on contesting a hidden defect after purchase for a step-by-step guide.