High Quality Content by WIKIPEDIA articles! The Octagon House, also known as Hawley House, in Barrington, Illinois is a mid-19th century residence listed on the National Register of Historic Places. The Octagon House is an eight-sided, two-story structure originally intended for residential use. According to the National Register of Historic Places Inventory Nomination Form submitted in June 1978, the home was built in or around 1860 by a Mr. Brown, likely Joseph Brown. The structure is entirely wood-framed and covered with clapboards.