Each structure within the development shall have a compatible architectural theme with the variations and designs to provide an attractiveness to the development which shall include consideration of landscaping techniques, building orientation to the site, and to other structures, topography, natural features and, for townhouses and garden apartments, individual dwelling unit design such as varying unit widths, staggering unit setbacks, providing different exterior materials, changing roof lines and roof designs, altering building heights, and changing types of windows, shutters, doors, porches, colors and vertical or horizontal orientation of the facade, singularly or in combination for each dwelling unit.