These designs are often marked by open, informal floor plans. The exterior could include odd shapes and angles, and even a flat roof. Most contemporary house plans have a noticeable absence of historical style and ornamentation. Many have large windows, some of which may flaunt trapezoidal shapes. Natural materials such as wood and stone may create a harmony between the contemporary home and its landscape. Inside, cathedral ceilings and exposed beams may draw the eye upward. The contemporary, or modern, floor plan dates back to the mid-1960s. We've also included some sprawling homes with traditional elements on their facades, just in case the angled look is a bit too “now' for your tastes.