At common law, arson is the malicious and voluntary or wilful burning of another's house, or dwelling house, or outhouse appurtenant to or a parcel of the dwelling house or within the curtilage.
By statute, a person is guilty of arson, if, under circumstances not amounting to aggravated arson, by means of fire or explosives, he unlawfully and intentionally damages:
a. any property with intention of defrauding an insurer; or
b. the property of another. [State v. Durant, 674 P.2d 638, 639 (Utah 1983)].