Ben Lomond Farm was begun about 1830 by Benjamin Tasker Chinn, the grandson of Robert “Councillor” Carter. Its Federal style stone manor house and accessory buildings survive as reminders of an estate that is one of the few remaining Carter family houses in an area that once included country residences such as Portici, Pittsylvania, Hazel Plain, Mountain View, Elmwood, Sudley, and Woodland. The house served as a hospital during the First and Second Battles of Manassas. A small stone accessory building west of the house is thought to have been a slave quarter, and in 1980 Prince William County moved this building from its original site east of the house to save it from demolition.