The R-3 Multiple-Family Residential District is established in recognition that sections of the Village may be suitable for moderate density multiple-family as well as one-family and two-family purposes. It is the purpose of this district to allow moderate density residential development on land considered to be appropriate for such development. Among these sections is land served by public water and sewer systems in areas of the Village where the need for higher density development is best served by the provisions of this district in allowing a choice of dwelling unit types while providing essential services and facilities at an adequate level without overcrowding the land.