Barnett House, also known as Big Spring, is a historic home located near Elliston, Montgomery County, Virginia. The house was built about 1808, and underwent a radical transformation in the early 20th century. It is a two-story, five bay brick dwelling with a single pile central passage plan. The front facade features a one-story wraparound porch through the two-story portico across the facade. Also on the property is a contributing stuccoed frame meathouse. It was listed on the National Register of Historic Places in 1989.