Whenever any person has acquired title to any property for which it could institute condemnation proceedings and said property is subject to any mortgage or other lien and proceedings have been afterwards commenced by the holders of any such mortgage or lien to enforce the same, the court in which such proceedings are pending may on due notice appoint 3 commissioners from among the county commissioners created by s. 32.08 to appraise and value said property in the manner prescribed in this subchapter as of the time when such person acquired title. Such appraisal shall be exclusive of the improvements made by that person or that person’s predecessors. Said appraisal, with interest, when confirmed by said court shall stand as the maximum amount of the encumbrance chargeable to the property so taken and judgment shall be rendered according to equity for an amount not exceeding such appraisal, with interest, against such person and may be enforced as in other cases. On the payment of such amount such person shall hold said property free and discharged from said mortgage or lien. An appeal may be taken from the award of such commission by the plaintiff and tried and determined as an appeal from the county condemnation commissioners under this subchapter and the action to enforce such mortgage or lien shall in the meantime be stayed.