Opposition House is a historic double house in Cambridge, Massachusetts. The two story hip-roofed wood-frame house was built in 1807 by Judge Francis Dana, who was seeking to prevent the laying of Harvard Street across his estate, making it a kind of spite house. Dana's efforts were unsuccessful; the road was routed around this house, which he had sited along the intended route. The house was moved to its present location in the 1860s. It is the oldest surviving house on Dana Hill.