W. Va. Code § 11-6F-3: Tax treatment of certified capital addition property.

Notwithstanding any other provisions of law, the value of certified capital addition property, for purposes of ad valorem property taxation under this chapter, is its salvage value, which for purposes of this article is five percent of the certified capital addition property's original cost. For capital additions certified on or after July 1, 2011, the value of the land before any improvements shall be subtracted from the value of the capital addition and the unimproved land value shall not be given salvage value treatment.