II. Trespass
Trespass to land is defined as an unjustifiable and direct physical interference with land that is in the immediate and exclusive possession of another person. It is a tort designed to protect a possessor’s right to enjoy his property without interference and his right to exclude others from it. The plaintiff does not need to prove actual loss in order to establish liability.
Physical element
For an act to constitute trespass, the intrusion must be direct and immediate rather than a merely consequential result of the defendant’s actions. Direct interference occurs when the intrusion is the immediate result of the defendant's own act. Obvious examples include wrongfully setting foot on the land, riding or driving over it, or throwing objects onto it. If the interference is a consequential or indirect result of the defendant's behaviour, liability in trespass does not arise, though the defendant may be liable in private nuisance or negligence. For instance, if a defendant builds a fire and noxious fumes drift over a neighbour’s property, it is a nuisance rather than trespass because the intrusion is indirect.
Common forms of trespass
(i) Physical entry and intrusion
The simplest form of trespass is the unlawful physical entry onto another’s land. Liability is triggered by the “slightest crossing of the boundary”, such as placing part of a foot on the plaintiff’s land. Trespass occurs if a person wrongfully sets foot on, rides, or drives over the land.
(ii) Interference with structures and fixtures
Trespass occurs by fixing items to another’s land, such as bolting air conditioning units to an exterior wall, driving nails into a wall, or leaning a bicycle against a shop window.
It is a trespass to remove doors, windows, or walls from a building in the possession of another.
While natural growth like overhanging branches is usually a nuisance, planting a vine specifically to grow up a neighbour’s wall can be classified as trespass.
(iii) Placing or removing objects and substances
A trespass does not actually require the defendant’s physical presence on the land. A trespass may occur if the defendant directly causes an object or substance to enter the property. This includes actions such as throwing stones, dumping soil, debris, or waste, or discharging water and effluent directly onto another’s land.
Similarly, placing or leaving goods and chattels on the land of another without consent constitutes a trespass. In such cases, the landowner may be considered an involuntary bailee and is entitled to remove the offending items provided he exercises reasonable care in doing so. If the owner of the goods seeks to retrieve them, the landowner may impose conditions, such as charging a reasonable fee, for allowing the person onto the land to take the goods back.
(iv) Interference with possession and access
Trespass is not limited to physical intrusion onto the land itself. It also includes acts that interfere with the occupier’s possession of the land.
Examples include expelling the person in possession, physically removing or locking out the occupier, and preventing a person with an exclusive right to possess the land from entering it. Harassing a tenant in order to force him out may amount to trespass.
(v) Invasion of airspace and sub-soil
The scope of land extends vertically, and interference at these levels is actionable. Trespass to airspace can be committed by structural projections (like overhanging cranes or signs), firing projectiles, or flying objects at low heights that interfere with the ordinary use and enjoyment of the land. Unauthorised mining or laying pipes in the sub-soil without authority also constitutes trespass.
(vi) Acts involving animals
An owner is strictly liable when his cattle (which includes specific domestic animals like horses, oxen, sheep, pigs, and poultry) trespass onto a neighbour’s land and cause damage. In other words, it does not matter whether the owner has an intention to send his cattle to the neighbour’s land and cause damage.
However, an owner may be liable for trespass if he intentionally sends animals other than cattle onto another’s land.
Liability may also arise if a person negligently fails to prevent animals under their control from entering prohibited ground when there is a known risk of such entry.
(vii) Interference with incorporeal rights
The holder of a profit à prendre (a right to take natural resources or produce from another’s land, such as minerals, timber, or crops) may bring an action in trespass against anyone who interferes with the subject matter of that right, provided he has exclusive possession of that right. For example, the holder of an exclusive fishing right can sue in trespass any person who fishes in the fishery or otherwise disrupts that right. Another example is where the landowner blocks access to land so that the holder of a right to take timber cannot enter and cut it.
(viii) Trespass by exceeding or overstaying permission
Using land for any purpose other than the specific right granted (e.g., using a right of way for something other than passing and repassing) makes one a trespasser.
If a person’s right of entry expires (such as a tenant remaining after a lease ends or a licensee remaining after revocation), staying on the land becomes a trespass.
(ix) Abuse of authority
If a person enters land under legal authority (not by the owner's consent) and then commits a positive act of misfeasance or abuse of that authority, he is deemed a trespasser from the moment of his entry.
Mental element
For an act to be defined as trespass, the physical entry must be voluntary. However, the defendant does not need to intend to trespass or even know they are on someone else’s land. An honest mistake, such as getting lost in fog or misinterpreting a boundary line, is no defence. Trespass can also be committed negligently if a defendant knows there is a risk of entry but fails to prevent it. Liability is only avoided if the act is truly involuntary, such as being physically thrown onto the land by others.
Continuing trespass
Every day a trespass remains unremedied (such as failing to remove a structure built on the plaintiff's land) constitutes a fresh trespass and a new cause of action.
