All applications (see "application," Article XXVIII, Terminology) for building permits shall be accompanied by duplicate plans 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 buildings already existing, if any, and the location and dimensions of the proposed building, wetlands, water bodies or alteration. The application shall include all setbacks and such other information as lawfully may be required by the Building/Zoning Official, including existing or proposed building or alteration, existing or proposed uses of the building and land, the number of families, housekeeping units, or rental 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.