A pre-existing structure which is nonconforming with the standards of this code may be continued, maintained, remodeled, or reconstructed; provided, that the new construction does not further intrude into the required setbacks. New construction or related activity shall not be considered further intruding into a required setback so long as the footprint of the structure lying within the setback is not increased by more than 1,000 square feet and no portion of the structure is located closer to the property lines than the original footprint of the structure.