Applications for permits. Applications for zoning permits shall be accompanied by plans in duplicate drawn to scale showing the actual dimensions and shape of the lot to be used, the sizes and locations of existing structures on the lot, the location and dimensions of the proposed structure or alteration. The application shall include such other information as may be required by the Planning Official to determine conformance with this chapter, including existing or proposed buildings or alterations, existing or proposed uses of buildings and land, number of families, housekeeping units, rental units, existing conditions on adjacent property. One copy of the plans shall be returned to the applicant with the signed approval or disapproval of the Planning Official noted on the copy within a reasonable time.