The Cooper house is an excellent example of the Prairie style of architecture. The horizontal emphasis is achieved by the distinctive change of building material from brick on the first story to stucco on the second story. The flat porch roof and the band of wood trim between the floors further emphasize the horizontal lines.
Screens of windows are also a Prairie technique that bring the natural outdoors inside the homes. They are seen at the corners on the second floor. Wide overhanging eaves on the hipped roof are further Prairie style elements of the house. While the architect remains unknown, oral history indicates that it was designed by a student of Frank Lloyd Wright. The original owner, Henry "Harry" J. Cooper, was the vice president of the Old Second National bank.