Orth House II is one of two twin Prairie School style houses in Winnetka designed by Walter Burley Griffin as an investment property for William S. Orth and constructed in 1908. Griffin worked for Frank Lloyd Wright before striking out on his own, and these twin houses were one of his first commissions after leaving Wright. He is most famous for winning an international competition to design the capital city of Australia, Canberra. Orth House II is listed on the National Register of Historic Places.