Legal

Material Latent Defect

A hidden defect in a property that is not discoverable through a reasonable inspection and that would affect a buyer's decision to purchase or the price they'd pay. Examples include a history of flooding, structural problems hidden behind drywall, or the presence of toxic substances. Sellers in Ontario have a legal obligation to disclose known material latent defects.

Why It Matters

If a seller knowingly hides a serious defect, they can face legal consequences even after closing. As a buyer, this is why home inspections and the right questions matter. And as a seller, disclosure isn't just ethical -- it's required by law.

Real-World Example

After purchasing a home in Roncesvalles, you discover that the basement floods every spring -- something the previous owner experienced for years but never disclosed. The foundation crack causing the flooding was hidden behind finished drywall and not detectable during a standard home inspection. Because the seller knew about the flooding and failed to disclose it, you have grounds for a lawsuit to recover your repair costs.

Ontario & GTA Context

Ontario common law requires sellers to disclose material latent defects -- defects that are hidden, serious, and would affect the buyer's decision. Patent defects (visible issues) do not need to be disclosed because the buyer can see them. Ontario courts have consistently ruled against sellers who concealed known problems, awarding damages for repair costs and sometimes for diminished property value.

How It Works in Practice

As a buyer, ask targeted questions about the property's history: flooding, insurance claims, repairs, pest issues, and any known defects. As a seller, disclose everything you know -- the legal and financial risk of concealment far outweighs the discomfort of disclosure. Your agent can help you determine what must be disclosed.

Common Questions

What is the difference between a latent and patent defect?▾

A patent defect is visible and discoverable through a reasonable inspection (cracked window, peeling paint). A latent defect is hidden and cannot be detected through normal inspection (mold behind walls, faulty wiring inside walls). Sellers must disclose known latent defects but are not required to point out patent ones.

Can I sue the seller for not disclosing a defect?▾

Yes, if you can prove the seller knew about a material latent defect and deliberately concealed it. You will need evidence that the defect existed before the sale, that the seller was aware of it, and that it materially affects the property. Consult a real estate litigation lawyer promptly, as limitation periods apply.

Related Terms

Home Inspection

Structural Issue

Conditional Offer

Related Guides

First Time Buyer

Home Inspection Costs

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