Colo. Rev. Stat. § 38-21.5-102
Where a rental agreement is entered into between the owner and the occupant, the owner and his or her heirs, executors, administrators, successors, and assigns have a lien upon all personal property located at the self-service storage facility for rent, labor, or other charges, present or future, including late fees as specified in section 38-21.5-101.5 (3), in relation to the personal property and for expenses necessary for its preservation or expenses reasonably incurred in its sale or other disposition pursuant to this article 21.5. The lien attaches as of the date the personal property is brought to the self-service storage facility and continues so long as the owner retains possession and until the default is corrected, a sale is conducted, or the property is otherwise disposed of to satisfy the lien. Before taking enforcement action pursuant to section 38-21.5-103 (1)(b), the owner shall determine if a financing statement concerning the property to be sold or otherwise disposed of has been filed with the secretary of state in accordance with part 5 of article 9 of title 4.
C.R.S. § 38-21.5-102