If there be any building standing in whole or in part upon any land to be taken, the jury or court shall add to the finding of the value of the land taken, the value or damage to such building as the case may require. If the entire building is taken, or if it is damaged so that it cannot be readjusted to premises of the owner, then the measure of damages shall include the fair market value of the building. If part of the building is taken, or it is damaged but can be readjusted or replaced on premises of the owner, then the measure of damages shall be the cost of readjusting or moving the building or part thereof left, together with the depreciation in the market value of said building by reason of said readjustment or moving.