Buying a home is one of the biggest financial decisions you will ever make. You expect the property to be safe, structurally sound, and free from serious problems. But what happens if you move in and discover major hidden defects that were never disclosed?
Many homeowners in Ontario ask the same question: Can you sue after buying a house with hidden defects? The answer is yes in certain situations. However, the success of your claim depends on the type of defect, what the seller knew, and what was disclosed before closing.
Understanding your rights under Ontario real estate law is crucial if you find yourself dealing with costly surprises.
In Ontario, defects in a property are generally divided into two categories:
These are visible issues that can be discovered during a normal home inspection. For example:
Buyers are responsible for identifying patent defects before closing. If you could have discovered the issue through reasonable inspection, you usually cannot sue afterward.
Latent defects are hidden problems that are not visible during a regular inspection and may only become apparent after moving in. Examples include:
These are the types of defects that can potentially give rise to a lawsuit.

In Ontario, a seller has a legal obligation to disclose latent defects that:
If a seller knowingly hides or fails to disclose such a defect, this may amount to misrepresentation.
Misrepresentation can be:
If you can prove that the seller knew about the issue and failed to disclose it, you may have the right to sue for damages.
For buyers navigating complex property disputes, speaking with an experienced professional in real estate litigation can be critical. Learn more about your legal options by consulting a qualified real estate lawyer in Ontario at https://khanllp.com/real-estate-lawyer-ontario.
To succeed in a lawsuit for hidden defects, you typically must prove:
This can be challenging. Courts require evidence such as:
Without strong evidence, proving that the seller had prior knowledge can be difficult.

Courts in Ontario have ruled in favor of buyers in cases involving:
If a seller actively attempts to hide a serious problem, the court may award compensation for repair costs and additional damages.
If you purchased property in the Greater Toronto Area and discovered hidden issues, consulting a real estate lawyer in Toronto can help you understand whether your situation qualifies for legal action. You can explore your rights further at https://khanllp.com/real-estate-lawyer-toronto.
Many purchase and sale agreements include “as is” clauses. Buyers often assume this means they have no legal protection.
However, even with an “as is” clause:
An “as is” clause does not protect a seller who intentionally hides serious problems. Courts in Ontario have repeatedly confirmed that fraudulent misrepresentation overrides such clauses.
If your purchase agreement contained special conditions or representations, reviewing the original purchase and sale contract is extremely important. Understanding the legal structure of your agreement can make or break your case. You can learn more about how agreements work by reviewing information on purchase and sale transactions here: https://khanllp.com/purchase-and-sale.
Ontario has a limitation period of two years from the date you discovered (or reasonably should have discovered) the defect.
This means the clock does not necessarily start on closing day, it starts when the issue becomes known or reasonably identifiable.
However, there is also an ultimate limitation period of 15 years from the date of the act or omission.
If you delay too long, you may lose your right to sue entirely. Acting quickly is crucial.
If your claim is successful, you may recover:
The goal of the court is typically to place you in the financial position you would have been in had the defect been properly disclosed.
Sometimes buyers wonder whether they can sue the home inspector instead of the seller.
If the defect should reasonably have been discovered during inspection but was missed due to negligence, you may have a claim against the inspector.
However, inspectors are not responsible for hidden structural issues that cannot be detected without invasive investigation.
Each case depends on the facts and the terms of the inspection agreement.
If you uncover a serious problem after closing:
The sooner you seek legal advice, the better your chances of protecting your rights.
Discovering hidden defects after purchasing a home can be financially and emotionally devastating. However, Ontario law does protect buyers in cases involving undisclosed latent defects and misrepresentation.
You may be able to sue if you can prove the seller knew about the problem and failed to disclose it. Every situation is unique, and the outcome depends heavily on evidence and legal strategy.
If you suspect you have been misled during a real estate transaction, seeking professional legal advice promptly can help you determine your options and potential remedies.
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Khan Law is a boutique law practice that has been providing legal services to the Greater Toronto Area since the year 2000.