The plat showing such cluster developments shall depict the areas within which such structures may be located with building footprints, the height and spacing of buildings, open spaces and their landscaping, off-street open and enclosed parking spaces, streets, driveways, and any other features required by the Planning Board. The dwelling units, as permitted, may be, at the discretion of the Planning Board, in detached, semidetached, attached or multifamily structures.