C.R.S. § 18-4-203

(1) A person commits second degree burglary, if the person knowingly breaks an entrance into, enters unlawfully in, or remains unlawfully after a lawful or unlawful entry in a building or occupied structure with intent to commit therein a crime against another person or property. (2) Intentionally left blank —Ed. (a) Second degree burglary is a class 4 felony if the burglary is of an occupied structure or of a building being used for the operation of a commercial business. (b) Second degree burglary is a class 3 felony if: (I) It is a burglary of a dwelling; (II) The objective of the burglary is the theft of a controlled substance, as defined in section 18-18-102 (5), lawfully kept within any building or occupied structure; or (III) The objective of the burglary is the theft of one or more firearms or ammunition. (c) Second degree burglary is a class 2 misdemeanor if the person knowingly violated a written notice by a retailer or an order by a court of lawful jurisdiction specifically restraining a person from entering a particular retail location during hours which the retail store is open to the public. (d) Second degree burglary is a class 5 felony if the burglary is of any other building not described in subsection (2)(a), (2)(b), or (2)(c) of this section.