In addition to any other required setback or buffering, grocery store, retail, and office uses may exceed the maximum building footprint of 40,000 square feet up to a maximum building footprint of up to 80,000 square feet, provided that the building shall be set back a minimum of 100 feet from any boundary line of any adjacent property within the following zoning districts: R-1, R-2, PRD, AG-A, and R-AG, whether the abutting property is within or outside of the Overlay District.