RCW 9A.52.020: Burglary in the first degree.

(1) A person is guilty of burglary in the first degree if, with intent to commit a crime against a person or property therein, he or she enters or remains unlawfully in a building and if, in entering or while in the building or in immediate flight therefrom, the actor or another participant in the crime (a) is armed with a deadly weapon, or (b) assaults any person.

(2) Burglary in the first degree is a class A felony.