House Window Designs The former bay window design is common in cheaper homes or in homes where building full bay windows is not feasible. The latter bay window design is an expensive option as it disrupts the floor plan of your room. But the magnificence of a full bay window design is worth the effort and expenditure House Window Designs There are two basic styles in which bay windows are constructed. It is either in the form of a box that starts a little below head height or a full bay window in the form of a floor-to-ceiling polygon that creates a nook.