Does a seller have to tell me if someone died in the home I'm buying in Ontario?

Ontario's disclosure rules are generally built around physical conditions that make a home unsafe or unfit to live in, not around a property's history or the feelings a buyer might have about it. A death having occurred in a home, even one that might feel unsettling to some buyers, is typically treated as what's sometimes called a "stigmatized property" issue rather than a latent physical defect, and sellers generally are not required to volunteer this kind of history on their own initiative.

Where this can change is if a seller is asked a direct question about it and answers dishonestly, since making a false statement in response to a specific question carries its own risk regardless of whether disclosure would have been mandatory in the first place. It can also become relevant if the underlying circumstances left an actual physical condition behind, such as damage or contamination, in which case the physical condition itself is what would trigger a duty, not the history alone. A buyer who cares about this kind of history should ask directly and in writing, since that is the most reliable way to get a real answer either way.