Nothing contained herein shall require any change in the overall layout, plans, construction, size, or designated uses of any development, structure, or part thereof, for which the official approvals and required permits have been granted prior to enactment of the ordinances codified in the Zoning Code. The construction of which, conforming with such plans, shall have been started prior to the effective date of the ordinances codified in the Zoning Code, and the completion thereof carried on in a normal manner within the subsequent one-year period, and not discontinued until completion, except for reasons beyond the property owner’s or builder's control.