Modern Three Story House Design . Find small, 2 bath, single floor, simple w/garage, modern, 2 story & more designs. Modern house design with open floor plan. Nhà phố 10m 3 storey house design, Modern exterior house designs from www.pinterest.com The main level consists of the shared living spaces, along with a powder bath and stacked laundry closet. Castle house plans two story house plans cabin plans. This three storey modern house can be built in a lot having a total area of 250 square meters or having a dimension of at least 10 meters width and 25 meters depth.