The Borough of Runnymede is a local government district with borough status in the English county of Surrey. It is a very prosperous part of the London commuter belt, with some of the most expensive housing in the United Kingdom outside of central London, such as the Wentworth Estate. Runnymede is entirely unparished and is largely built-up, although with expanses of countryside. Places in the district include Addlestone, Egham, Egham Hythe, Chertsey, Thorpe, Virginia Water and Englefield Green. Adjacent boroughs include Spelthorne, Surrey Heath, Elmbridge, Woking and Windsor and Maidenhead.