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July 26, 2026Sources cited
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Arson

Arson is the crime of intentionally and maliciously setting fire to property, especially a building.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Arson is the crime of intentionally and maliciously setting fire to property, especially a building. In modern law, the term is often broader than its common-law origins and can include burning vehicles, personal property, or other property, depending on the jurisdiction. Accidental fires are not considered arson, as intent or wilfulness is a required element.

Definition

Arson is generally defined as the deliberate, unlawful burning of property. Dictionary and legal sources emphasize intent, malice, or criminal purpose as key elements of the offence. Intent or wilfulness is required; accidental fires do not meet the standard definition.

Historical background

At common law, arson was narrowly defined as the malicious burning of another person’s dwelling. This definition focused on the danger to human life and the sanctity of the home. Modern statutes have expanded the offence to cover a wider range of property and circumstances, including buildings, vehicles, and other structures.

The exact elements of arson differ by jurisdiction. Some laws include attempts to burn, explosions, reckless burning, or burning one’s own property for an improper purpose such as fraud. Punishment often depends on the risk posed to people and the type of property damaged. In some jurisdictions, arson is divided into degrees based on severity.

Arson investigations focus on whether a fire was intentionally set and may involve forensic analysis to determine the origin and cause. The term is also used for offences involving vehicles, forests, and other property in some legal systems. An arsonist is a person who commits arson, deliberately setting fire to property.

Key facts

  • Arson requires intent or wilfulness; accidental fires are not arson.
  • Historically, arson referred to burning another person’s dwelling under common law.
  • Many modern statutes extend arson beyond houses to include other public or private property.
  • Some legal definitions include reckless burning or burning with fraudulent intent, such as insurance fraud.
  • Punishment often depends on the risk posed to people and the type of property damaged.
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Canadian context

Canadian readers may encounter arson as a criminal offence under Canadian law, though the precise statutory wording and penalties are matters of Canadian legislation and case law rather than the general dictionary definition.

Frequently asked questions

What is arson?
Arson is the intentional and malicious setting of fire to property, especially a building.
Does arson only involve buildings?
No. Many modern laws also cover vehicles, personal property, and other types of property, depending on the jurisdiction.
Is an accidental fire arson?
No. Arson requires intent or wilfulness; accidental fires do not meet the standard definition.
Can reckless burning be arson?
In some jurisdictions, yes. Certain legal definitions include reckless conduct or burning done without regard to consequences.
What is an arsonist?
An arsonist is a person who commits arson, meaning someone who deliberately sets fire to property.
What was arson under common law?
At common law, arson meant the malicious burning of another person’s dwelling, especially when human life was endangered.

References

  1. Cambridge English Dictionaryhttps://dictionary.cambridge.org/us/dictionary/english/arson
    Supports: General definition of arson as intentionally starting a fire to damage or destroy property.
  2. Merriam-Websterhttps://www.merriam-webster.com/dictionary/arson
    Supports: Definition of arson as willful or malicious burning of property, especially with criminal intent.
  3. Encyclopaedia Britannicahttps://www.britannica.com/topic/arson
    Supports: Historical common-law definition and modern expansion to other property and degrees of offence.
  4. Cornell Law School, Legal Information Institutehttps://www.law.cornell.edu/wex/arson
    Supports: Common-law origin, jurisdictional variation, and federal U.S. arson statute overview.
  5. Federal Bureau of Investigationhttps://www.fbi.gov/crime-in-the-u.s/2017/crime-in-the-u.s.-2017/topic-pages/arson
    Supports: UCR definition including willful or malicious burning or attempting to burn various property types.
  6. Australian Institute of Criminologyhttps://www.aic.gov.au/publications/bfab/bfab1
    Supports: Core elements of arson: fire, intention/wilfulness, malice, and property.