When a person suffers an injury on commercial or residential property, the occupier's first instinct is often to look for ways to avoid liability. This is where defences come into play. In Canadian occupiers' liability law, defences represent the legal tools and strategies that property occupiers can rely upon to reduce or eliminate their responsibility for injuries that occur on their premises. Understanding these defences is not about evading legitimate responsibility, but rather about comprehending the full landscape of legal obligations and the mechanisms the law provides for occupiers who have taken reasonable precautions or who face claims that do not properly reflect the circumstances of an incident.
The concept of a defence in occupiers' liability flows from the fundamental principle that liability is not automatic. While occupiers owe duties of care to those who enter their property, the law recognizes that not every injury that occurs on a premises should result in the occupier bearing financial responsibility. Defences exist because the legal system acknowledges several important realities. Visitors sometimes contribute to their own injuries through carelessness or deliberate risk-taking. Occupiers who provide adequate warnings about known hazards should not be held responsible when visitors ignore those warnings and suffer harm. Parties can freely contract to allocate risks between themselves, and when they do so knowingly and voluntarily, courts will often respect those arrangements. These principles form the foundation of the defensive strategies available to occupiers across Canada.