Queensberry House is a building of 17th-century origin which is now Category A listed by Historic Environment Scotland. It was built between 1667–1670 as a grand lodging house for Margaret Douglas of Balmakelly, and was later modified in 1681 by Charles Maitland of Hatton. The building has an extensive history, most notably when James Douglas, Earl of Drumlanrig and his son, murdered a kitchen boy in 1707, on the same night the Earl of Drumlanrig signed the Act of Union between the Kingdom of Scotland and Kingdom of England.