Each application for a building permit shall be accompanied by plans and specifications, including plot plans as required, drawn to scale, showing the location and size of all proposed new construction and all existing structures on the site, the nature and character of the work to be performed and the materials to be incorporated, the distance from plot lines, the widths and grades of adjoining streets, walks and alleys and the details of structural, mechanical and electrical work, including computations, stress diagrams and other essential technical data. Such plans and specifications shall include on the plot plan or site plan the proposed location of all underground facilities, including gas service, electric service, sewer lines, drainage lines (including routing of drainage from roof leaders and footing drains) to a positive outlet, water lines, sprinkler lines, telephone lines, etc. The building plans shall include plans for mechanical services, including gas, electric, water, heating and air conditioning. Plans and specifications shall bear the signature of the person responsible for the design and drawings and the architect's or engineer's signature, seal and New York State license number.