If the plans, drawings, representations, bills of material, and specifications of work, and estimates of the cost thereof in detail and in the aggregate, required in sections 153.31 to 153.35, inclusive, of the Revised Code, relate to the building of a courthouse or jail, or an addition to or alteration, repair, or improvement thereof, they shall be submitted to the board of county commissioners, together with the clerk of the court of common pleas, the sheriff, and probate judge, and one person to be appointed by the judge of the court of common pleas, for their approval. If approved by a majority of them, a copy thereof shall be deposited with the county auditor and kept in his office.