Maximum individual building size, gross first floor area 11,000 square feet. Where approved by the Board of Supervisors as a conditional use, buildings larger than 11,000 square feet in gross floor area may be permitted, where applicant demonstrates to the satisfaction of the Board of Supervisors that the design of the building and its relationship(s) to surrounding buildings and landscaped areas mitigates any negative impacts of large building size on the character of this district. Mitigating factors may include arrangement of adjacent buildings, parking, and pedestrian areas and/or obvious offset in building height or facade design such that the visible or perceived size of individual buildings is generally in keeping with local historical precedent.