Idaho Code § 45-508

In every case in which one (1) claim is filed against two (2) or more buildings, mines, mining claims, or other improvements, owned by the same person, the person filing such claim must, at the same time, designate the amount due him on each of said buildings, mines, mining claims, or other improvement; otherwise the lien of such claim is postponed to other liens. The lien of such claim does not extend beyond the amount designated as against other creditors having liens by judgment, mortgage, or otherwise, upon either of such buildings, or other improvements, or upon the land upon which the same are situated.