Colorado Revised Statutes Title 39. Taxation § 39-5-104. Valuation of property

Each tract or parcel of land and each town or city lot shall be separately appraised and valued, except when two or more adjoining tracts, parcels, or lots are owned by the same person, in which case the same may be appraised and valued either separately or collectively. When a single structure, used for a single purpose, is located on more than one town or city lot, the entire land area shall be appraised and valued as a single property.