Section 64-614 - Process for establishing non-conforming uses
For all buildings with non-conforming uses utilizing any of the provisions of this Section, the amount of pre-existing non-conforming floor area and pre-existing non-compliances , as applicable, shall be based either on construction documents for such building that were previously approved by the Department of Buildings at the time of construction, enlargement , or subsequent alteration, as applicable, of the building or, where an approved set of construction documents does not exist for such building , an as-built drawing set completed by a professional engineer or architect. The Department of Buildings may request additional information to substantiate proof of non-conformances and non-compliances , as applicable. Verification by the Department of Buildings of such documentation shall be a pre-condition prior to any demolition for reconstruction work, or alteration permit issued by the Department of Buildings for a zoning lot altering or reconstructing buildings with non-conforming uses and non-compliances , as applicable, pursuant to the provisions of this Section.