 It was redesigned for use as the official residence by John Calvin Stevens, and its grounds are also landscaped by the Olmsted Brothers.Adjacent to, and across the street from, the Blaine mansion, are three houses that were purchased by the state in the 20th century to provide a buffer area around the mansion grounds.These properties include two Greek Revival houses built in the 1830s, and the 1911 Guy P. Gannett House, the only significant example of Mediterranean Revival architecture in Kennebec County.