The restoration of castles and tower houses in Scotland, generally by private individuals and families, has been taking place for over a century and is of major significance in the field of historic buildings in the country, sometimes a subject of controversy.

Castles are buildings that combine fortifications and residence, and many were built within the borders of modern Scotland. They arrived in Scotland with the introduction of feudalism in the twelfth century. Initially these were wooden motte-and-bailey constructions, but many were replaced by stone castles with a high curtain wall. During the Wars of Independence, Robert the Bruce pursued a policy of castle slighting. In the Late Middle Ages, new castles were built, some on a grander scale as "livery and maintenance" castles that could support a large garrison. Gunpowder weaponry led to the use of gun ports, platforms to mount guns and walls adapted to resist bombardment.