Exterior, Brick Siding Material, Concrete Siding Material, and Stone Siding Material By arranging the rooms along the perimeter of each building, the duo managed to comfortably accommodate 40 single rooms on each of four floors, for a total of 160.  Photo 5 of 8 in 8 Great Examples of Outdoor Design from Cutting-Edge Dorms Embrace The Landscape with No Need for Elevators or Interior Stairs