The application shall contain a general description of the proposed work, its location, the use and occupancy of all parts of the building or structure and of all portions of the site or lot not covered by the building; and shall state whether fire extinguishing equipment, plumbing, water piping, gasfitting, heating, or electrical work is involved, the estimated cost of the work including the general work, and such additional information as may be required; the facts contained in each application are to be certified by the applicant under oath.