I am often asked whether a problem discovered after purchasing a property automatically constitutes a latent defect. The answer is no.
Water infiltration, a foundation crack, or a plumbing problem may be serious without necessarily meeting the legal definition of a latent defect. Each situation must be assessed based on the facts, the available documents, and the condition of the property at the time of the sale.
The Four Conditions Generally Considered
In Quebec, a defect must generally meet the following four conditions to be considered a latent defect.
1. The defect existed at the time of the sale
The problem must have been present when the transaction took place, even if it only became apparent later.
For example, a foundation membrane that was already defective at the time of the sale could cause water infiltration that only appears the following spring. Conversely, damage caused after the purchase by a new event, lack of maintenance, or an alteration made by the buyer would not normally constitute a defect that existed at the time of the sale.
2. The defect was hidden
The defect must not have been discoverable by a prudent and diligent buyer during normal checks. The Civil Code of Québec specifies that a defect is apparent when it can be noticed without the assistance of an expert.[^1]
This does not mean, however, that a buyer may disregard visible warning signs. A significant crack, moisture stains, a persistent odour, or a recommendation in the inspection report may justify further investigation.
3. The defect was unknown to the buyer
The buyer must not have known about the problem when the sale was concluded.
The seller’s declarations, the inspection report, invoices for previous work, written communications, and the answers provided during the transaction may therefore become important. A problem that was clearly disclosed before the sale generally cannot later be presented as an unknown defect.
4. The defect was sufficiently serious
A simple cosmetic flaw or minor repair is generally not enough. The problem must render the property unfit for its intended use or diminish its usefulness to such an extent that the buyer would not have purchased it—or would not have paid the same price—had they known about it.[^1]
The seriousness of the defect therefore does not depend solely on the cost of repairs. The nature of the problem, its consequences, its extent, and its effect on the use of the property must also be considered.
Example: Water Accumulation Discovered After the Sale
Imagine that, following heavy rainfall, a buyer discovers significant water accumulation behind a finished basement wall. After removing part of the wall covering, a specialist finds deteriorated materials, evidence of repeated infiltration, and a longstanding deficiency in the foundation drainage system.
This situation could raise the issue of a latent defect if the buyer can establish, among other things, that:
- the cause of the problem already existed at the time of the sale;
- no apparent sign would normally have allowed it to be discovered;
- the problem had not been disclosed;
- the consequences are sufficiently serious.
However, the presence of water after the sale does not, on its own, prove the existence of a latent defect. The weather conditions, maintenance performed since the purchase, alterations made to the property, the condition of the gutters and drainage system, and the observations recorded in the inspection report would also need to be examined.
For example, if the water accumulation resulted from a downspout moved by the new buyer or a drain that became blocked after the transaction, the assessment could be very different.
A Few Other Possible Examples
Depending on the circumstances, a latent defect could involve:
- chronic water infiltration concealed behind a wall covering;
- a structural deficiency that could not normally be observed;
- a hazardous electrical installation hidden inside the walls;
- a significant problem with underground plumbing;
- contamination or mould resulting from a previous, non-apparent problem.
Again, none of these problems automatically constitutes a latent defect. All four conditions must be assessed together.
Must the Seller Have Known About the Problem?
Not necessarily. When the sale includes the legal warranty of quality, the fact that the seller was unaware of the defect does not automatically eliminate that warranty.[^2]
The situation may be different when the property is sold without the legal warranty of quality, particularly “at the buyer’s own risk.” The exact wording of the deed of sale and the seller’s actual knowledge then become especially important. Legal advice may be necessary to determine what remedies are available.
What Should You Do When a Problem Is Discovered?
The buyer should act carefully and avoid allowing the situation to deteriorate.
It is generally recommended that the buyer:
- photograph and document the problem;
- retain all reports, invoices, and communications;
- obtain an opinion from a qualified professional regarding the cause, age, and extent of the problem;
- notify the seller of the situation in writing within a reasonable time;
- allow the seller to examine the problem before work begins, when circumstances permit;
- promptly consult a lawyer or notary to preserve their rights.
The Civil Code expressly provides that the defect must be reported to the seller in writing within a reasonable time after its discovery. When a defect appears gradually, this period begins when the buyer could have suspected its seriousness and extent.[^3]
Urgent repairs may, of course, be necessary to protect the occupants or prevent further damage. In that situation, it is especially important to preserve detailed evidence of the condition before, during, and after the work.
Be Mindful of Time Limits
The limitation period applicable to many civil remedies is generally three years. However, specific rules may determine when that period begins, particularly when damage appears late or gradually.[^4]
Written notification and legal proceedings are two separate steps. It is therefore best not to wait before obtaining legal advice suited to the situation.
A Pre-Purchase Inspection Remains an Essential Step
I sometimes see buyers treat the inspection as a mere formality. Yet it is an important step in identifying apparent defects and, above all, warning signs that may justify consulting a specialist.
A pre-purchase inspection is generally visual and non-destructive. It therefore does not guarantee the absence of latent defects, but it may reveal signs of water infiltration, condensation, moisture, or other concerns.[^5]
The inspection should also be accompanied by a careful review of the seller’s declarations. When a warning sign is identified, it is best to understand it before waiving the conditions of the promise to purchase.
Understanding the Property Before You Buy
My role as a real estate broker is to guide you through the process, help you review the available information, and recommend the appropriate professionals when the situation requires it.
No property is perfect. The objective is to understand its condition as thoroughly as possible, ask the right questions, and make an informed decision based on your needs and comfort level.
This article is provided for informational purposes only and does not constitute legal advice. Whether a problem qualifies as a latent defect and what remedies may be available depend on the specific facts of each situation. If a problem arises, promptly consult a legal professional.
[^1]: Civil Code of Québec, art. 1726, Légis Québec.
[^2]: OACIQ, The Legal Warranty of Ownership and Quality.
[^3]: Civil Code of Québec, art. 1739, Légis Québec; Gouvernement du Québec, Demand Letter—Latent Defects.
[^4]: Civil Code of Québec, arts. 2925 and 2926, Légis Québec—section 2925 and section 2926.
[^5]: OACIQ, The Inspection, and Standards of Practice for Building Inspection.
