Clarence House is a royal residence on The Mall in the City of Westminster, London. It was built in 1825–1827, adjacent to St James's Palace, for the royal Duke of Clarence, the future King William IV.

St James's Palace is the most senior royal palace in London, the capital of the United Kingdom. The palace gives its name to the Court of St James's, which is the monarch's royal court, and is located in the City of Westminster in London. Although no longer the principal residence of the monarch, it is the ceremonial meeting place of the Accession Council, the office of the Marshal of the Diplomatic Corps, and the London residence of several members of the royal family.