Definition
Trespass is an intentional and unauthorized entry onto another person's land (trespass to land) or an intentional interference with another person's movable property (trespass to chattels). For trespass to land, the law requires no proof of actual damage—the unauthorized entry itself is the wrong, because the tort protects the owner's exclusive right to possess the property. Trespass can give rise to both civil liability and, in many states, criminal charges.
Legal Meaning
Trespass is one of the oldest intentional torts and exists to protect a person's right of exclusive possession. The most familiar form, trespass to land, occurs when someone intentionally enters or remains on land they have no right to occupy, causes an object to enter the land, or refuses to leave after permission is withdrawn. Critically, the plaintiff does not have to prove the entry caused any harm; even a brief, harmless intrusion is actionable and can support nominal damages.
The second form, trespass to chattels, involves the intentional interference with another person's personal property—their movable goods. Unlike trespass to land, this version generally requires some actual harm, such as damage to the item, a meaningful deprivation of its use, or impairment of its condition. When the interference is so serious that it effectively destroys the property or deprives the owner of it entirely, the claim may rise to the more serious tort of conversion.
The intent required for trespass is intent to enter or interfere, not intent to do something wrongful. A person who deliberately walks onto a parcel of land is a trespasser even if they sincerely believe it is their own or think they have permission. A genuinely involuntary entry—such as being physically pushed onto the land—usually does not satisfy the intent element. Trespass standards, defenses, and any related criminal penalties vary by state.
Key Points
- Trespass to land is an intentional, unauthorized entry onto another's real property
- No actual damage is required for trespass to land—the entry alone is the wrong
- Trespass to chattels is intentional interference with movable personal property
- Trespass to chattels generally requires some actual harm or deprivation
- The required intent is to enter or interfere, not to do something wrongful
- Remedies include damages (including nominal damages) and injunctions
- Many states also treat certain trespasses as a crime, often a misdemeanor
- Defenses include consent, necessity, and lawful privilege; rules vary by state
Real-World Example
A homeowner posts "No Trespassing" signs along the edge of their wooded property. A neighbor decides to take a shortcut and walks across the back portion of the land to reach a trail, doing no damage and disturbing nothing.
Even though the neighbor caused no harm, this is a trespass to land. The neighbor intentionally entered property they had no right to enter, which is all the tort requires. The homeowner could pursue a claim and, in many states, the neighbor could also face a criminal trespass charge for crossing posted land. If, instead, the neighbor had driven an ATV across the property and torn up the lawn and a flower bed, the homeowner could recover compensation for that physical damage in addition to vindicating the right to exclude others. This illustrates the core principle: harm is not required, but it can increase the available damages.
Trespass to Land vs. Trespass to Chattels
| Feature | Trespass to Land | Trespass to Chattels |
|---|---|---|
| Protected Interest | Exclusive possession of real property | Possession and condition of personal property |
| What Counts | Unauthorized entry onto land | Unauthorized use, damage, or interference with goods |
| Harm Required? | No—entry alone is enough | Yes—generally requires actual harm or deprivation |
| Required Intent | Intent to enter the land | Intent to interfere with the property |
| Common Remedy | Damages (even nominal) and/or injunction | Damages for the actual harm caused |
Defenses and Related Concepts
Several defenses can excuse what would otherwise be a trespass. Consent is the most common: a person who is invited onto land or given permission to use property is not a trespasser, though exceeding the scope of permission can convert lawful presence into trespass. Necessity may justify entry to prevent serious harm, such as crossing land to escape danger, though private necessity may still require paying for any damage caused. Police and other officials may have a lawful privilege to enter, and a valid search warrant can authorize what would otherwise be an unlawful entry.
Trespass is closely related to other property doctrines. It differs from nuisance, which involves interference with the use and enjoyment of land without a physical entry. Long-running, open trespass can, in some circumstances, lead to adverse possession claims, while a recorded easement can give someone a legal right to cross land that would otherwise be a trespass. When entry causes injury to a person rather than property, claims of negligence or premises liability may also come into play.
Related Terms
Dealing With a Trespass or Property Dispute?
Whether you are the owner or the accused, understanding your rights matters
Find a Lawyer Near YouWhen You Need a Lawyer
Trespass disputes can escalate quickly, especially between neighbors or over disputed boundaries. Consider consulting an attorney if:
- Someone repeatedly enters your land or interferes with your property
- A boundary or access dispute may involve an easement or adverse possession
- A trespass has caused real damage and you want to recover compensation
- You are accused of trespass and may face civil or criminal consequences
- You want an injunction to stop ongoing or threatened intrusions
An attorney can clarify your rights, the proper remedy, and the risks of self-help. For help finding counsel and understanding costs, see our guides on how to choose a lawyer and understanding legal fees.
Frequently Asked Questions
Do you have to cause damage to commit trespass to land?
No. Trespass to land does not require any actual harm to the property. The mere unauthorized entry is enough, and a court can award nominal damages even when nothing was damaged. This is because the tort protects the landowner's exclusive right of possession, not just the physical condition of the land. If real damage occurs, the owner can recover compensation for it as well.
What is the difference between trespass to land and trespass to chattels?
Trespass to land is an unauthorized physical entry onto someone's real property, while trespass to chattels is an intentional interference with someone's personal property, such as using or meddling with their movable goods. A key difference is harm: trespass to land needs no actual damage, but trespass to chattels generally requires some actual harm to, or deprivation of, the property to be actionable.
What intent is required for trespass?
Trespass requires intent to enter the land or interfere with the property, not intent to do something wrong. A person who deliberately walks onto land has the required intent even if they honestly believe it is their own property or have permission. A purely accidental entry, such as being thrown onto land by an outside force, generally does not satisfy the intent requirement.
Is trespass a crime or a civil wrong?
Trespass can be both. As a tort, it allows the property owner to sue for damages or an injunction in civil court. Many states also make certain trespasses a crime, often a misdemeanor, particularly when a person refuses to leave after being warned or enters posted or fenced property. The civil and criminal cases are separate and have different standards of proof.
Filing Deadlines Still Apply
Civil trespass claims must be filed within your state's statute of limitations. See the deadlines in our state-by-state statute of limitations guide.