The site plans shall provide for the development of the project as a unified whole with design features that will tie principal, accessory and other site structures together and relate site features successfully and harmoniously to similar elements in surrounding buildings or structures. In criticizing these aspects of the site plan, the Board shall consider the building materials to be used, the use of color and texture, the massing of architectural elements, the nature and positioning of windows, doors and other building features, advertising structures and elements, building height, paving materials, landscape materials and pedestrian and vehicle accommodations and furnishings. In the case of auto parking areas, truck loading areas, utility buildings and structures and similar accessory areas and structures, special consideration shall be given to the use of screen planting or other screening methods where said features or structures are incongruous with the existing or contemplated character of adjacent areas.