In the United Kingdom, a listed building is a structure of particular architectural and/or historic interest deserving of special protection. Such buildings are placed on one of the four statutory lists maintained by Historic England in England, Historic Environment Scotland in Scotland, Cadw in Wales, and the Northern Ireland Environment Agency in Northern Ireland. The classification schemes differ between England and Wales, Scotland, and Northern Ireland. The term has also been used in the Republic of Ireland, where buildings are protected under the Planning and Development Act 2000, although the statutory term in Ireland is "protected structure."

Cadw is the historic environment service of the Welsh Government and part of the Tourism and Culture group. Cadw works to protect the historic buildings and structures, the landscapes and heritage sites of Wales, to make them available for the public to visit, enjoy, and understand their significance. Cadw manages 127 state-owned properties and sites. It arranges events at its managed properties, provides lectures and teaching sessions, offers heritage walks, and hosts an online shop. Members of the public can become members of Cadw to gain membership privileges.