Application. All applications for a building permit shall be accompanied by a site plan, blueprint or engineering drawing showing the location, actual shape and dimensions of the lot to be built upon, the exact size and location on the lot of the proposed or existing building and accessory buildings, the lines within which the building shall be erected, altered or moved, the existing or intended use of each building or part of a building, the number of families the building is intended to accommodate, and such other information with regard to the lot and neighboring lots or buildings as may be necessary for the enforcement of this section. All dimensions shown relating to the location and size of the lot shall be based upon an actual survey. The lot and the location of the building thereon shall be staked out on the ground before construction is started.