Colorado Revised Statutes Title 30. Government County § 30-28-120. Existing structures--county property

(1) The lawful use of a building or structure or the lawful use of any land, as existing and lawful at the time of the adoption of a zoning resolution or, in the case of an amendment of a resolution, at the time of such amendment, may be continued, although such use does not conform with the provisions of such resolution or amendment, and such use may be extended throughout the same building if no structural alteration of such building is proposed or made for the purpose of such extension. The addition of a solar energy device or a device used as part of a system that uses geothermal energy for water heating or space heating or cooling to such building shall not necessarily be considered a structural alteration. The board of county commissioners may provide in any zoning resolution for the restoration, reconstruction, extension, or substitution of nonconforming uses upon such terms and conditions as may be set forth in the zoning resolution.

(2) If any county acquires title to any property by reason of tax delinquency and such property is not redeemed as provided by law, the future use of such property shall be in conformity with the then provisions of the zoning resolution of the county, or with any amendment of such resolution, equally applicable to other like properties within the district in which the property acquired by the county is located.