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Occupiers’ Liability in Ontario: Duties, Claims, Defences and How to Protect Yourself

Date: June 9, 2026

Anyone who owns, manages, leases, or controls property in Ontario carries a legal duty to the people who enter it. When someone is injured because a property was not reasonably safe, an occupiers' liability claim can follow. These claims can involve landlords, commercial tenants, property managers, and municipalities, and they frequently intersect with real estate disputes over who was responsible for the conditions that caused the injury.

This article explains what occupiers' liability means in Ontario law, who qualifies as an occupier, the standard of care that applies, common claims and defences, and how liability is allocated when multiple parties control the same property.

The short answer
Occupiers' liability is the duty owed by anyone who controls a property to ensure it is reasonably safe for persons who enter it. In Ontario it is governed by the Occupiers' Liability Act. The duty applies to owners, landlords, commercial tenants, and property managers alike.

The standard is not a guarantee of safety but reasonable care in all the circumstances. Where multiple parties control the same premises, both can be occupiers and both can be liable depending on who had control over the specific condition that caused the injury.

What is occupiers' liability?

Occupiers' liability is the body of law that governs the duty of care owed by those who control property to people who enter it. In Ontario, this duty is codified in the Occupiers' Liability Act, RSO 1990, c O.2, which replaced the common law categories of invitee, licensee, and trespasser with a single statutory standard of reasonable care.

The Occupiers' Liability Act imposes a positive obligation on occupiers. Section 3 provides that an occupier owes a duty to take such care as in all the circumstances of the case is reasonable to see that persons entering the premises and the property they bring onto the premises are reasonably safe while on the premises.

The duty applies regardless of how the visitor came to be on the property, except for trespassers, who are owed a lower duty under section 4 of the Occupiers' Liability Act. For all lawful visitors, including customers, tenants, employees, delivery persons, and members of the public on commercial premises, the full reasonable care standard applies.

Who is an occupier?

The Occupiers' Liability Act defines an occupier broadly. An occupier is any person who has physical possession of the premises, or who has responsibility for and control over the condition of the premises, the activities carried on there, or the persons allowed to enter. This definition is deliberately wide and captures a range of parties beyond the legal owner of the property.

Property owners An owner who occupies their own property is the most straightforward case. But ownership alone is not sufficient: it is control over the premises that creates occupier status, not title. An owner who has transferred possession and control to a tenant may no longer be the occupier of those areas.
Commercial tenants A business that leases commercial space and operates it as a retail store, office, restaurant, or other commercial premises is an occupier of that space. Employees, customers, and delivery personnel who enter the leased premises are owed the full duty of reasonable care by the tenant.
Landlords A landlord who retains control over common areas (lobbies, parking lots, walkways, stairwells), structural elements, or shared systems remains an occupier of those areas and owes the duty of care to anyone who enters them. A landlord who has no retained control over the leased areas is generally not an occupier of those areas.
Property managers A property management company that has day-to-day responsibility for maintaining the premises, arranging repairs, and controlling access can be an occupier even if it does not have legal title or a lease. Control over the condition of the premises is sufficient.
Municipalities Municipalities are occupiers of public sidewalks, roads, parks, and other public spaces. Claims against municipalities for slip and fall injuries on public sidewalks are among the most common occupiers' liability claims in Ontario, with specific notice requirements under the Municipal Act, 2001.
Multiple occupiers More than one party can be an occupier of the same premises simultaneously. A landlord and a commercial tenant may both be occupiers of different parts of the same property, or of the same parts for different purposes. Where multiple parties are occupiers, each owes the statutory duty of care and liability is allocated based on who had control over the specific condition that caused the injury.

Common occupiers' liability claims

Occupiers' liability claims arise from a wide range of conditions and circumstances. The following are the most frequently litigated categories in Ontario.

Slips and falls on ice and snow

Winter maintenance is the most common source of occupiers' liability claims in Ontario. Property owners and occupiers must take reasonable steps to address ice and snow accumulation on their premises. What is reasonable depends on the circumstances: the severity of the weather, whether the hazard was foreseeable, what maintenance steps were taken, and whether the hazard was temporary or ongoing. Documented snow clearing and salting records are critical evidence in defending these claims.

Indoor slip and fall hazards

Wet floors, spills, uneven flooring, loose mats, and inadequate lighting are common indoor hazards. A retailer whose employee mops a floor during business hours and fails to place warning signs may be liable for injuries to customers who slip. The key questions are whether the occupier knew or ought to have known about the hazard and whether reasonable steps were taken to address it or warn visitors.

Structural defects and poor maintenance

Broken stairs, faulty handrails, damaged flooring, inadequate fencing around hazards, and other structural defects that cause injury can give rise to occupiers' liability claims. A landlord who is aware of a defect in a common area and fails to repair it within a reasonable time may be liable for injuries that result. Documentation of when defects were reported, when repairs were scheduled, and what interim measures were taken is important evidence.

Failure to warn of temporary hazards

Even a temporary hazard such as a construction zone, a recently waxed floor, or a spill that has not yet been cleaned up can give rise to liability if adequate warning is not given. The obligation to warn is part of the reasonable care standard: if a hazard cannot be immediately addressed, warning signs, barriers, or other precautions must be deployed while the hazard persists.

Municipal sidewalk and road claims

Claims against municipalities for injuries on public sidewalks, roads, and parks are subject to specific requirements under Ontario's Municipal Act, 2001. Notice of the claim must be given to the municipality within 10 days of the injury. Failure to provide this notice within the required period can bar the claim entirely. If you are injured on a public sidewalk or in a public space, seek legal advice immediately about the notice requirement.

Trespasser claims

Trespassers are owed a lower duty under section 4 of the Occupiers' Liability Act: the occupier must not wilfully or recklessly cause harm to trespassers. However, where the occupier has reason to believe that a trespasser may enter, or where children are likely to trespass, additional considerations apply. Attractive nuisances (swimming pools, construction equipment, and similar hazards that attract children) require particular attention even where entry would technically be trespass.

For claims against municipalities in Ontario, notice must be given within 10 days of the injury under the Municipal Act, 2001. This is one of the shortest and most consequential notice periods in Ontario civil law. If you are injured on a municipal sidewalk, road, or public space, contact a lawyer immediately. Missing the 10-day notice requirement can permanently bar your claim.

Defences to occupiers' liability claims

Being named in an occupiers' liability claim does not mean the claim will succeed. Ontario law provides several well-established defences, and a strong defence often combines more than one.

Defences available to occupiers

  • Reasonable care was taken in all the circumstances
  • The hazard was open and obvious and would have been apparent to a reasonable person
  • The occupier had no knowledge of the hazard and no reason to know of it
  • The hazard was caused by a third party and the occupier acted reasonably once aware
  • The visitor voluntarily assumed the risk of the known hazard
  • The visitor's own negligence contributed to the injury (contributory negligence)
  • The claim is statute-barred by the two-year limitation period

Contributory negligence in practice

  • Ontario's Negligence Act allows damages to be apportioned between parties
  • A visitor who was not watching where they were going may be partially at fault
  • Wearing inappropriate footwear for known conditions can reduce recovery
  • Ignoring warning signs or barriers can be contributory negligence
  • Each party's share of fault is assessed as a percentage
  • The occupier's liability is reduced by the visitor's percentage of fault

Facing an occupiers' liability claim or dispute over property responsibility?

Whether you are defending a claim or asserting one, the allocation of responsibility in occupiers' liability matters requires careful legal analysis. Achkar Law advises landlords, tenants, and property managers across Ontario and BC on real estate disputes including occupiers' liability.

Speak With a Real Estate Litigation Lawyer Or call us: 1-800-771-7882

Occupiers' liability and landlord-tenant disputes

Occupiers' liability claims frequently intersect with disputes between landlords and tenants over who is responsible for maintaining which parts of a commercial property. The lease is the primary document that allocates these responsibilities, but it does not always produce a clean answer when an injury occurs.

A commercial lease that assigns maintenance responsibility for common areas to the landlord while leaving the leased premises to the tenant creates a division of occupier status that mirrors that allocation. Where the lease is ambiguous about who controls a particular area or system, both parties may be found to be occupiers of that area, and both may face liability for injuries that arise there.

When a landlord and tenant dispute arises over who bears responsibility for an occupiers' liability claim, the analysis typically involves: what the lease says about maintenance and repair obligations; what each party actually did in practice to maintain the relevant area; whether the hazard was in a common area or the leased premises; and whether the party who had notice of the hazard took reasonable steps to address it.

These disputes can escalate quickly, particularly where an injured third party has commenced a claim against both the landlord and tenant simultaneously. Early legal advice on the allocation of responsibility can prevent a landlord-tenant dispute from compounding the cost and complexity of the underlying occupiers' liability claim. See our guide to commercial real estate disputes in Ontario for a broader overview of landlord-tenant conflicts.

Protecting yourself as an occupier: practical steps

The best defence against an occupiers' liability claim is a documented record of reasonable maintenance and prompt response to known hazards. Courts assess what the occupier did, not just whether a hazard existed. An occupier who can show a system of regular inspections, documented repairs, and appropriate responses to complaints is in a significantly stronger position than one who has no records at all.

  • Conduct and document regular property inspections, including seasonal checks for winter hazards
  • Respond promptly to reports of hazards and document the response, including the date reported, the date addressed, and what interim measures were taken
  • Use clear and visible warning signs for temporary hazards that cannot be immediately remediated
  • Maintain records of maintenance contracts, repairs, and cleaning logs
  • Review your lease carefully to understand which areas and systems you are responsible for maintaining
  • Ensure your property insurance covers occupiers' liability claims and that the coverage is adequate for the nature and volume of visitors to your premises

Occupiers' liability in British Columbia

BC has its own Occupiers Liability Act, RSBC 1996, c 337, which imposes equivalent duties to Ontario's legislation. The BC Act similarly defines occupier broadly, applies a reasonable care standard to lawful visitors, and provides a lower duty for trespassers. BC courts apply the same general principles as Ontario in assessing whether the duty of care was met and in allocating fault between multiple occupiers.

One procedural difference is the notice requirement for claims against BC municipalities. Claims against BC municipalities for injuries on public property are subject to notice requirements under BC's Local Government Act and Community Charter. As in Ontario, failure to give timely notice can bar the claim. If you are injured on municipal property in BC, seek legal advice immediately about the applicable notice requirements.

Practical takeaways

Occupiers' liability applies to anyone who controls a property, not just the legal owner. Landlords, commercial tenants, property managers, and municipalities can all be occupiers and all can be held liable.
The standard is reasonable care in all the circumstances, not a guarantee of safety. An occupier who can demonstrate a documented system of inspection, maintenance, and prompt hazard response is in a strong defensive position.
For claims against Ontario municipalities, notice must be given within 10 days of the injury under the Municipal Act, 2001. This is the most urgent deadline in occupiers' liability law. Miss it and the claim is barred.
Contributory negligence by the visitor reduces the occupier's liability proportionally under Ontario's Negligence Act. A visitor who ignores obvious hazards, fails to watch where they are walking, or wears inappropriate footwear may share fault for their injury.
Both a landlord and a commercial tenant can be occupiers of the same premises simultaneously. When an injury occurs, liability is allocated based on who had control over the specific condition that caused it.
The two-year limitation period under Ontario's Limitations Act, 2002 applies to occupiers' liability claims, subject to the shorter municipal notice requirement. Acting quickly preserves both the legal claim and the evidence needed to support it.

Frequently asked questions

What is occupiers' liability in Ontario?

Occupiers' liability is the legal duty owed by anyone who controls a property to ensure it is reasonably safe for persons who enter it. In Ontario it is governed by the Occupiers' Liability Act, RSO 1990, c O.2. The Act requires occupiers to take such care as is reasonable in all the circumstances to ensure that persons entering the premises are reasonably safe.

Who is an occupier under the Ontario Occupiers' Liability Act?

An occupier is any person who has physical possession of the premises or has responsibility for and control over the condition of the premises, the activities carried on there, or the persons allowed to enter. This includes property owners, landlords, commercial tenants, and property managers. Multiple parties can be occupiers of the same premises simultaneously.

What is the standard of care for occupiers in Ontario?

Under the Occupiers' Liability Act, an occupier must take such care as is reasonable in all the circumstances to ensure that persons entering the premises are reasonably safe. This is an objective standard of reasonable care, not a guarantee of safety. What is reasonable depends on the nature of the premises, the type of visitor, the foreseeability of harm, and the cost and practicality of precautions.

What defences are available against an occupiers' liability claim?

Common defences include: the occupier met the standard of reasonable care; the hazard was open and obvious; the occupier had no knowledge of the hazard; the hazard was caused by a third party; the visitor voluntarily assumed the risk; and contributory negligence by the visitor (which reduces damages proportionally under Ontario's Negligence Act). The limitation period defence is also available if the claim was brought too late.

How long do you have to bring an occupiers' liability claim in Ontario?

The basic limitation period under Ontario's Limitations Act, 2002 is two years from discovery. For claims against municipalities, notice must be given within 10 days of the injury under the Municipal Act, 2001. Missing the 10-day municipal notice requirement can permanently bar the claim regardless of its merits. Seek legal advice immediately after any injury on municipal property.

Can a landlord and tenant both be liable under the Occupiers' Liability Act?

Yes. Both a landlord and a commercial tenant can be occupiers of the same premises simultaneously and both can owe the duty of care to visitors. Liability is typically allocated based on who had control over the specific condition that caused the injury. Where the lease is ambiguous about maintenance responsibilities, both parties may share liability and the allocation between them becomes a question for the court.

Facing an occupiers' liability claim or a dispute about property responsibility in Ontario or BC?

Whether you are a landlord, commercial tenant, or property manager defending a claim or disputing how liability is allocated between you and another party, Achkar Law can advise on your position and help you resolve the dispute efficiently. We represent clients across Ontario and British Columbia in real estate disputes including occupiers' liability matters, commercial landlord-tenant conflicts, and property maintenance disputes.

Call us at 1-800-771-7882 or fill out the form below and we will be in touch.