Macdonald House, London
Macdonald House is a seven-storey building in Grosvenor Square in Mayfair, London that used to be part of the High Commission of Canada in London. Macdonald House was used for the cultural and consular functions, trade and administrative sections of the High Commission, the Immigration section as well as the High Commissioner's official residence. Previously, Macdonald House was the home of the American Embassy in London.
In 1936 the former (residential) buildings on this site were demolished as part of a redevelopment scheme led by the Duke of Westminster. The current building occupies numbers 1 to 3 on the eastern side of the square.
The American embassy moved into the building in 1938. The current US embassy, also in Grosvenor Square, was completed in 1960. During the Second World War when the Chancery was on one side and U.S. General Dwight D. Eisenhower's headquarters on another, Grosvenor Square became popularly known as "Little America."
The building was renamed Macdonald House in honour of Canada's first prime minister Sir John A. Macdonald, and was reopened by the Canadian High Commission on Dominion Day (July 1), 1961.