Improvements to real property designed and used primarily for the purpose of manufacturing a product from renewable energy, as defined in § 56-576, are hereby declared to be a separate class of property and shall constitute a classification for local taxation separate from other classifications of real property. The governing body of any county, city, or town may, by ordinance, levy a tax on the value of such improvements at a different rate from that of tax levied on other real property. The rate of tax imposed by any county, city, or town on such improvements shall not exceed that applicable to the general class of real property.
Va. Code § 58.1-3221.4