Tenn. Code Ann. § 13-7-302

Power is hereby granted to the chief legislative body of any municipality to establish by ordinance zones or districts in territory adjoining but outside of such municipality and lying within planning regions in which the municipal planning commission has been designated as the regional planning commission under § 13-3-102, and in which territory the county has no zoning already in force; provided, that prior to final enactment of such ordinance, six (6) months' notice of intent shall have been filed with the county mayor of the county or counties within which the municipality and/or region lies. Within such zones or districts, the municipality may, by ordinance regulate the location, height, bulk, number of stories and size of buildings and other structures, the percentage of lot occupancy, the required open spaces, the density of population and the uses of land, buildings, and structures.