No nonconforming building shall be enlarged, extended or increased unless the use of the same is permitted in the district in which it is located and provided said enlargement, extension or increase by itself conforms with all requirements of this Zoning Chapter and the dimensions and setback of said enlargement, extension or increase, when aggregated with the existing building do not create or increase any dimensional or setback violation of this Zoning Chapter and provided further that the area of said enlargement, extension or increase, when aggregated with the area of the existing building, does not exceed the maximum lot coverage standard permitted in that zone or any other standard whatsoever established by this Zoning Chapter. Exception to yard depths are set forth in the Schedule referenced in Section 16-8 of this chapter.