5 or more unit multi-family house plans sometimes referred to as multiplex or apartment plans. Multi-Family designs provide great income opportunities when offering these units as rental property. Another common use for these plans is to accommodate family members that require supervision or assisted living but still appreciate having private space. These multiple dwelling designs can have the outward appearance of row houses while others might be designed as a single structure with divided living units such as apartment buildings.
For 3 unit house plans see TriPlex Multi Family Plans
For 4 unit house plans see FourPlex Multi Family Plans
For more info about Multi unit plans see Multi unit Investment blog