The planning commission shall ensure the compatible design of all multifamily and nonresidential projects which abut properties in the R-1A, R-2A, R-2B, R-3A, or R-3B zones. To accomplish this goal, the planning commission shall have the authority to impose more restrictive development standards than the provisions of the zone in which the project is located. The planning commission shall review each multifamily and nonresidential project in terms of its impact on the adjoining residential neighborhood, including but not limited to such design elements as window location, balconies, location of recreational facilities, entryways, and garage or parking locations. The planning commission may require transitional height increases in order to promote a visual transition between the multifamily or nonresidential project and the adjoining residential neighborhood and to ensure that adequate landscape buffering is provided and permanently maintained. The planning commission shall also consider building facades, roof designs, and use of materials and colors to ensure compatibility with the architectural design elements generally found in the adjoining residential neighborhood.