Any building any portion of which will be above the grade of the lot on which it is erected which will be used by a public utility may be erected in any district in the Village, provided the provisions of this chapter, except the purpose for which the building is to be used, are complied with, and provided further the application for the building permit is referred by the Building Inspector to the Plan Commission and the Plan Commission determines that the building, when erected, is reasonably necessary for the public convenience and welfare and in harmony with the general purpose and intent of this chapter, and the Plan Commission may authorize the issuance of a permit subject to appropriate conditions and safeguards to accomplish such purpose.