To design a beautiful house plans two story, think about the proportion of the building. The height of the two floors in relation to each other should be pleasing to the eye. You could also add some unique features like a spiral staircase in the center, which not only looks beautiful but also saves space. Another aspect is the use of color. Using a harmonious color palette for the exterior and interior of the two - story house can make it look more attractive. Moreover, consider the views from each floor. Try to maximize the views of the surrounding landscape or cityscape from different rooms on both floors.