The Abbot House, also known as the Abbot-Spalding House, is a historic house at One Abbot Square in Nashua, New Hampshire. Built in 1804, this two story wood frame house is an extensively modified Federal style frame house with brick side walls, a locally rare feature. A Greek Revival addition was added in 1842, and a tower added later in the 19th century was removed during major alterations made in 1905. These alterations included the addition of the Colonial Revival front portico.The house was listed on the National Register of Historic Places in 1980. The house is now owned by the Nashua Historical Society, which operates it as a museum.
