Criminal trespass is knowingly entering or remaining on someone else’s property without permission. Every state treats it as a crime, and the penalties range from a small fine for stepping onto unmarked open land to years in prison for entering an occupied home while armed. Two things drive the charge: whether you were actually on property you had no right to be on, and whether you knew — or should have known — that your presence was unwelcome.
What Prosecutors Have to Prove
A criminal trespass conviction requires two things: an unauthorized physical act and a culpable mental state. The physical part is simple. You either entered property you had no right to enter, or you stayed after your right to be there ran out. The mental part is where most cases are won or lost.
The Model Penal Code, which has shaped trespass statutes in most states, puts it this way under Section 221.2: a person commits criminal trespass by entering or secretly remaining in a building or occupied structure while knowing they lack permission to be there.1Criminal Law Web. Model Penal Code Section 221.2 – Criminal Trespass The word “knowing” does the heavy lifting. Someone who genuinely believes open land is a public park, or who crosses an unmarked field thinking they have permission, lacks the state of mind the law requires. Prosecutors do not need to show any intent to cause harm. They only need to show you were aware your presence was unauthorized.
The MPC also covers “defiant trespass,” which reaches people who enter or remain on any property where notice against trespassing has been given through direct communication, posted signs, or fencing designed to keep people out.1Criminal Law Web. Model Penal Code Section 221.2 – Criminal Trespass That second category matters because it extends beyond buildings to any land where the owner has taken visible steps to exclude outsiders. Hop a fence clearly meant to keep people out, and the fence itself proves you knew.
How Notice Is Established
Because the crime hinges on knowledge, prosecutors need to show how you were put on notice. Notice comes in several legally recognized forms.
Signs and Fencing
“No Trespassing” signs are the most familiar method, but a single sign on the front gate rarely satisfies the legal standard. States impose detailed requirements on sign size, spacing, and content. Minimum sign dimensions in states that specify a size run from roughly 100 to 144 square inches. Spacing requirements vary widely, from every 100 feet along the boundary to as much as 660 feet between postings. Many states also require the signs to include the property owner’s name and to be placed at every access point.
Fencing serves as constructive notice. A fence obviously designed to keep people out communicates the same message as a sign, and the Model Penal Code recognizes “fencing or other enclosure manifestly designed to exclude intruders” as legally sufficient notice.1Criminal Law Web. Model Penal Code Section 221.2 – Criminal Trespass A decorative garden border probably would not qualify. A six-foot chain-link fence with a locked gate almost certainly would.
Purple Paint
More than 20 states allow property owners to mark boundaries with purple paint instead of posted signs. The paint carries the same legal weight as a written “No Trespassing” sign. Where adopted, the laws typically require vertical purple stripes of a specific minimum height and width, placed at regular intervals along the property boundary and at a standardized height above the ground. The paint stays visible for years, which is why the approach is popular in rural and forested areas where signs get destroyed by weather or knocked down.
Verbal Warnings
A direct verbal warning from the property owner or an authorized representative creates immediate notice. Once someone tells you in person that you are not welcome, the legal boundary is set regardless of what signs are or are not posted. This is the fastest and least ambiguous form of notice. The challenge is proving it later, which is why owners dealing with repeat trespassers often follow up verbal warnings with written ones.
When Permission Runs Out
You do not have to break in for it to count as trespass. One of the most common scenarios starts with a lawful entry. A customer in a store, a guest at a party, a visitor in someone’s home — all have permission to be there until that permission is revoked. Once an owner or someone acting on their behalf tells you to leave and you stay, your lawful visit becomes a crime.
The revocation does not need to follow any special procedure. A verbal command to leave, delivered by the owner or their representative, is enough. You must then depart within a reasonable time. What counts as reasonable depends on the situation. Walking to the exit of a store is different from gathering your belongings in someone’s house. But lingering after a clear demand to leave is where the charge attaches. The Model Penal Code classifies defying a personal order to leave as a petty misdemeanor, a step above the baseline violation-level offense for ordinary defiant trespass.1Criminal Law Web. Model Penal Code Section 221.2 – Criminal Trespass
This distinction affects how police respond. When officers arrive and one side claims an invitation while the other denies it, law enforcement sometimes treats the situation as a civil matter and tells the owner to pursue eviction rather than making an arrest on the spot. The cleaner the revocation — a witnessed verbal command, a written notice, prior warnings — the easier it is for officers to act immediately.
How the Charge Is Graded
Not all trespass is treated equally. The severity of the charge turns on what kind of property you entered and what you did there.
Homes and Dwellings
Entering someone’s home without permission is the most serious form of trespass short of burglary. Most states classify trespass into a dwelling as a higher-degree offense than trespass onto open land or into a commercial building. The Model Penal Code treats trespass in a dwelling at night as a misdemeanor, while the same act in a non-dwelling building is only a petty misdemeanor.1Criminal Law Web. Model Penal Code Section 221.2 – Criminal Trespass The logic is simple. People are most vulnerable in their homes, especially at night.
Critical Infrastructure
Trespassing on power plants, water treatment facilities, oil and gas pipelines, and telecommunications hubs triggers enhanced penalties in a growing number of states. Unauthorized access to these sites creates risks far beyond ordinary property damage. Disrupting a water supply or electrical grid affects thousands of people. Many of these statutes classify first offenses as misdemeanors and repeat violations or those causing damage as felonies.
Agricultural Land and Open Space
Farm and ranch land receives heightened protection in many states because trespassers can damage crops, disturb livestock, or introduce contamination. Agricultural trespass statutes often carry steeper fines than ordinary open-land trespass, particularly when the land was clearly posted or fenced. At the other end of the spectrum, entering unmarked, unfenced open land is the least serious form of trespass and in some jurisdictions amounts to a civil violation.
Trespass vs. Burglary
These two charges get confused often, and the distinction matters enormously for penalties. Criminal trespass requires only that you entered or stayed without authorization while knowing you lacked permission. Burglary adds a critical extra ingredient: the intent to commit a crime inside. Walking into an unlocked office after hours because you are curious is trespass. Walking into that same office planning to steal a laptop is burglary, even if you never actually take anything. The intent at the moment of entry is what separates a misdemeanor trespass charge from a felony that can carry years in prison.
The distinction also explains why prosecutors sometimes charge trespass as a lesser included offense when a burglary case is weak. If they cannot prove you entered with criminal intent but can prove you were there without permission, the trespass charge sticks even if the burglary charge falls apart.
Penalties
Penalties for criminal trespass run from small fines to multi-year prison sentences. The variation is enormous. A first offense on unmarked open land might produce nothing more than a fine, while entering an occupied dwelling while armed can put you in state prison.
Misdemeanor Trespass
Most trespass charges are misdemeanors. Maximum jail sentences vary from as little as 30 days for a basic offense to a full year for trespass in a dwelling or repeated violations. Fines for a first-offense misdemeanor typically fall between $250 and $2,500. Courts commonly impose probation of one to three years, during which you must stay away from the property and follow any other conditions the judge sets. Violating probation by returning to the property almost guarantees jail time.
Felony Trespass
Trespass escalates to a felony in several situations: entering an occupied dwelling, carrying a weapon during the trespass, targeting the home of a law enforcement officer or public official, or returning to a property after a prior trespass conviction. Felony sentences can reach several years of incarceration, and the conviction carries all the collateral consequences of a felony record — difficulty finding work, loss of voting rights in some states, and restrictions on firearm ownership. Courts also frequently order restitution for any property damage caused during the trespass, covering broken locks, damaged fencing, or destroyed landscaping.
Consequences Beyond the Sentence
Even a misdemeanor trespass conviction creates a criminal record that shows up on background checks. Employers routinely screen for criminal history, and a trespass conviction, particularly one involving a dwelling or a business, can raise flags during hiring. Courts handling trespass cases also have authority to issue stay-away orders requiring the defendant to avoid the property and sometimes the surrounding area. Violating a stay-away order is a separate criminal offense that typically carries harsher penalties than the original trespass.
Federal Trespass Charges
Most trespass cases are prosecuted under state law, but federal charges apply when the property has a federal connection. Two statutes cover the most common scenarios.
Restricted Federal Buildings and Grounds
Under 18 U.S.C. § 1752, knowingly entering or remaining in a restricted federal building or grounds without authorization is a federal crime punishable by up to one year in prison. “Restricted” covers the White House and its grounds, the Vice President’s residence, any building where a Secret Service protectee is visiting, and areas restricted for events designated as nationally significant. If you carry a weapon during the offense or someone suffers significant bodily injury, the maximum sentence jumps to 10 years.2Office of the Law Revision Counsel. 18 USC 1752 – Restricted Building or Grounds The statute also criminalizes flying a drone into restricted airspace above these locations.
Entry by False Pretenses
A separate federal statute, 18 U.S.C. § 1036, targets anyone who uses fraud or false pretenses to enter federal real property, federal vessels or aircraft, or secure areas of airports and seaports. The baseline penalty is up to six months in prison, but if the entry was committed with intent to commit a felony, the maximum rises to 10 years.3Office of the Law Revision Counsel. 18 USC 1036 – Entry by False Pretenses to Real Property of the United States Using a fake ID to access a military base or a secure airport terminal falls under this statute.
Civil Lawsuits on Top of Criminal Charges
Criminal charges are not the only exposure. A property owner can also sue a trespasser in civil court for money damages, and this can happen regardless of whether criminal charges are ever filed. The two proceedings are independent.
In a civil trespass suit, the property owner can recover compensatory damages covering the cost to repair damage, any reduction in the property’s market value, and the value of lost use or enjoyment. When the trespasser acted with particular recklessness or malice, courts may award punitive damages meant to punish rather than compensate. Some states authorize double or triple damages for specific types of trespass, such as cutting down trees on someone else’s land. Even when no actual damage occurred, the property owner can recover nominal damages, a small symbolic award that establishes the property right was violated. Nominal damages matter because they can serve as the foundation for an injunction preventing the trespasser from returning.
Defenses That Can Defeat the Charge
Being on someone else’s property without a written invitation does not automatically make you guilty. Several recognized defenses can defeat a trespass charge.
Lack of Knowledge
Because criminal trespass requires you to know your presence was unauthorized, a genuine mistake about whether you had permission is a complete defense. If the property had no signs, no fencing, and no one told you to stay out, prosecutors will struggle to prove you knew. The Model Penal Code explicitly provides a defense when the accused reasonably believed the property owner would have given permission to enter.1Criminal Law Web. Model Penal Code Section 221.2 – Criminal Trespass This defense works for things like entering a neighbor’s yard to retrieve a ball when the two of you have a longstanding friendly relationship, or walking into a business that appeared open.
Public Access
The Model Penal Code also provides a defense when the property was open to the public at the time and you complied with all lawful conditions for being there.1Criminal Law Web. Model Penal Code Section 221.2 – Criminal Trespass A store open for business, a park during operating hours, or a government building with public access hours cannot serve as the basis for a trespass charge as long as you followed the rules. This defense protects people who are later singled out and told to leave from a place where the general public was welcome.
Necessity and Emergency
Entering someone’s property to escape a genuine emergency is a recognized defense. If you run into a stranger’s garage to escape a tornado, or cross private land to reach an injured hiker, the necessity of the situation justifies the entry. The requirements are that the emergency was real and imminent, entering the property was the only reasonable option, and the harm you were trying to prevent was greater than the trespass. A person acting under necessity may still owe compensation for damage caused, but will not face criminal liability.
Abandoned Property
The Model Penal Code provides an affirmative defense when the building or structure was abandoned.1Criminal Law Web. Model Penal Code Section 221.2 – Criminal Trespass The defense has limits. The property must be genuinely abandoned, not merely vacant or temporarily unoccupied. A boarded-up house with no owner asserting rights is different from a vacation home that happens to be empty.
What Force a Property Owner Can Legally Use
Property owners who discover a trespasser face a question that gets a lot of people in trouble: how much force can you use? The answer is more limited than most people assume.
Reasonable Force to Remove Someone
A property owner can ask a trespasser to leave, and if the person refuses within a reasonable time, the owner can use reasonable force to remove them. “Reasonable” means the minimum force a sensible person would consider necessary under the circumstances. If the trespasser resists, the owner can increase force proportionally. Proportionality is the whole game. Shoving someone who is passively refusing to leave is different from striking someone who is simply standing on your lawn.
Deadly Force
The most dangerous misconception in property law is that you can shoot a trespasser. You generally cannot. Deadly force is justified only when you reasonably believe it is necessary to prevent imminent death, serious bodily injury, or certain violent felonies.4National Conference of State Legislatures. Self-Defense and Stand Your Ground A person wandering across your field, sitting on your porch, or even refusing to leave your yard does not meet that threshold. The threat has to be to people, not to property.
Castle doctrine laws, adopted in some form by the vast majority of states, create limited exceptions for occupied dwellings. When someone unlawfully forces their way into your home, many states presume you had a reasonable fear of death or serious harm, meaning deadly force may be justified. But castle doctrine applies to home intrusions that look like burglaries or home invasions, not to someone who knocks on your door or wanders into your open garage. A property owner who uses excessive force against a trespasser faces criminal charges of their own, from assault to manslaughter.
Squatters and Why Police Sometimes Will Not Remove Them
Squatting and trespassing overlap but are not the same thing legally, and the difference determines whether the owner calls the police or hires a lawyer. A trespasser is someone on your property without permission and without any colorable claim to be there. A squatter has moved in and is living on the property, sometimes long enough to complicate the owner’s ability to remove them through criminal channels.
Officers frequently decline to remove someone under criminal trespass law when there is any dispute about permission or possession. If the person originally entered with permission — a former tenant, an overstaying houseguest, a relative — police often classify the dispute as civil and direct the owner to eviction court. The criminal justice system handles clear-cut trespass. Civil courts handle possession disputes. This is where owners get frustrated, because civil eviction takes weeks or months while a trespass arrest can happen the same day.
In rare cases, a squatter who has occupied property openly, continuously, and without permission for long enough may claim ownership through adverse possession. The required time period varies dramatically by state, from as few as 2 years in limited circumstances to 20 or 30 years in most jurisdictions. Meeting the time requirement alone is not enough. The squatter must also prove their use was open and obvious, exclusive, and under a claim of ownership. Even then, adverse possession does not happen automatically. The squatter has to file a lawsuit and persuade a judge to transfer title, and courts presume the recorded owner has valid title unless proven otherwise.