Cairness House, 4.5 miles (7 km) south-east of Fraserburgh in Buchan in the county of Aberdeenshire, is a country house built in the Neoclassical style between 1791 and 1797 to designs by architect James Playfair. It replaced an earlier house of 1781 by Robert Burn, which was in part incorporated into the Playfair scheme. Sir John Soane assisted in the final stages of the construction after Playfair's death in 1794. The park was laid out by Thomas White, a follower of Lancelot 'Capability' Brown.
The Pevsner Architectural Guide for Aberdeenshire North and Moray states that "Cairness House, by James Playfair 1791-97, is of international importance as the only house in Britain, the design and construction of which reflected and evolved with the rapid advances in French Neoclassicism towards the end of the C18" and that "its survival is the more precious as so many of Playfair's other designs were either not built or have been lost or altered".