All applications for building permits are to be accompanied by plans in duplicate as determined by the Zoning Officer, drawn to scale, showing the actual dimensions and shape of the lot to be built upon; the exact sizes and locations on the lot of building already existing, if any; and the location and dimensions of the proposed building or alteration. The application includes such other information as the Zoning Officer requires, including existing or proposed uses of the building and land; the number of households or units the building is designed to accommodate; conditions existing on the lot; and such other matters as may be necessary to determine conformance with and provide for the enforcement of this chapter. One copy of the plans, denoted with approval or disapproval, will be returned to the applicant, and one copy, similarly marked, retained on Borough file.