If, on the hearing of such appeal, it shall appear that, by reason of any technical irregularity or defect in the proceedings, the assessment has not been properly made against the lot or parcel of land sought to be charged, the court may, nevertheless, on application of the authority, upon satisfactory proof that expense has been incurred which is a proper charge against the lot or land in question, enter judgment for the amount properly chargeable against the said lot or land.
In such case the court shall make such order for the payment of the costs as it may deem proper.