Mendip is a local government district in the English county of Somerset.
Once listed, severe restrictions are imposed on the modifications allowed to a building's structure or its fittings.
In England, the authority for listing under the Planning (Listed Buildings and Conservation Areas) Act 1990 rests with Historic England, a non-departmental public body sponsored by the Department for Digital, Culture, Media and Sport; local authorities have a responsibility to regulate and enforce the planning regulations.
Many of the rest of the buildings are urban or rural houses ranging in date from the 12th to 19th centuries.
The oldest is the Church of St Mary, Laverton, while the most recent is Mells War Memorial by Sir Edwin Lutyens.