Buyer and seller · Legal
The line between an apparent defect and a latent one is where most disputes are won or lost. Here is the Quebec framework, the reflexes that protect your recourse, and how sellers protect themselves.
Article 1726 of the Civil Code of Québec obliges the seller to warrant that the property is free of latent defects that make it unfit for its use or reduce its usefulness so much that the buyer would not have bought it, or not at that price, had they known. This legal warranty applies automatically to every sale unless explicitly excluded in the deed. To succeed, the buyer must prove four things at once: the defect was hidden, serious, existed before the sale, and was unknown to the buyer. The buyer must notify the seller in writing within a reasonable time after discovery, and the court action is subject to a three-year limitation running from the discovery of the defect, not from the purchase date. Recourse ranges from a price reduction to cancellation of the sale, with damages if the seller knew.
The key boundary is the apparent defect: a defect a prudent and diligent buyer can notice without an expert is not covered. The gutter hanging loose, visible from the sidewalk, is apparent. The foundation crack behind the drywall of a finished basement is potentially hidden. The whole legal battle often turns on that line.
The defect was hidden (not detectable through a prudent and diligent examination), it is serious (it really affects use or value), it existed before the sale, and the buyer did not know about it. One missing criterion and the claim fails. An expert report is almost always necessary to establish seriousness and prior existence. Concrete examples from case law: iron ochre clogging the drains, pyrite in the garage backfill, asbestos in textured ceilings when it requires work, foundations pumping water at every thaw. Conversely, the normal wear of a 20-year-old roof or a window at the end of its life is not a defect: a used house is allowed to be used.
First reflex: repair nothing before documenting and notifying. The law (article 1739) requires written notice to the seller within a reasonable time after discovery, so the seller can see the defect and propose a solution. Repairing first and claiming later deprives the seller of that right and seriously weakens the claim. Document everything: dated photos, videos, invoices, a building expert's report establishing the nature, seriousness and probable prior existence of the problem. Notify in writing, usually a formal notice drafted by a lawyer, describing the defect and inviting the seller to see it. Give the seller reasonable access before work; only urgent repairs (safety, worsening damage) are exceptions, with photos. Keep physical evidence: the clogged drain section, the backfill sample.
Two clocks run in parallel. Written notice to the seller must be given within a reasonable time after discovery; courts often use six months as a benchmark without making it a rigid rule. The court action is subject to a three-year limitation from the discovery of the defect, not from the purchase date. A defect discovered eight years after purchase can still ground a lawsuit. The classic trap is waiting: every month between discovery and notice gives the seller ammunition to argue the delay was unreasonable or that the worsening is your fault.
The main remedy is a reduction of the sale price reflecting the cost of corrective work, adjusted for any added value. If the defect makes the property unfit for habitation, outright cancellation of the sale is possible. If the seller knew about the defect and kept quiet, damages are added. In practice, most files settle before trial, often after the exchange of expert reports, and the Small Claims Court handles claims up to $15,000 without a lawyer.
The best defence against a future claim is full transparency in the OACIQ Declarations by the Seller form. A declared problem is no longer a latent defect: the buyer knew and bought accordingly. Concealing or minimizing turns an ordinary defect into intentional fault, with damages attached. Water infiltration repaired ten years ago, a sealed crack, water damage settled by insurance: declare everything, with the repair invoices. A detailed declaration reassures serious buyers and protects your price.
For the buyer, three gestures: a systematic pre-purchase inspection by a qualified inspector, a careful reading of the seller's declarations before making an offer, and a well-drafted inspection condition in the offer to purchase. None eliminates risk entirely, but together they filter the overwhelming majority of problems. Buying through a RE/MAX broker, two programs change your exposure: Tranquilli-T, offered at no cost, and Intégri-T, which covers the buyer up to $50,000 for three years. See our guide on the RE/MAX warranties.
Under article 1726 of the Civil Code of Québec, a serious defect, prior to the sale, unknown to the buyer and not apparent, that makes the property unfit for its intended use or reduces its usefulness so much that the buyer would not have bought it, or not at that price.
Three years from the discovery of the defect, after giving the seller written notice within a reasonable time.
The warranty of quality is excluded, so recourse for latent defects is very limited. Fraud remains actionable, but the inspection and the price must reflect the risk you take on.
Also available in French: version française de ce guide.
Published September 1, 2026 by the Loaa & Manseur team, the number 1 team at RE/MAX Platine in 2024 and 2025, 6th RE/MAX team in Quebec, 15th in Canada and in the global top 50 according to the official RE/MAX ranking. Tell us about your project.
Quebec runs on civil law, so several French terms have no direct English equivalent: hypothèque is a hypothec and not a mortgage, vices cachés are latent defects, and the taxe de bienvenue is legally transfer duties. The full list is in our Quebec real estate glossary. See also this term explained.
Équipe no 1 de RE/MAX Platine en 2024 et en 2025, 6e au Québec, 15e au Canada et dans le top 50 mondial au classement officiel RE/MAX. Réponse en moins de 24 heures, sept jours sur sept.