Justin Trudeau three half-siblings, Kyle and Alicia, from his mother's remarriage to Fried Kemper, and Sarah, from his father's relationship with Deborah Coyne. Trudeau lived at 24 Sussex Drive, Ottawa, the official residence of Canada's prime minister, from his birth until his father's government was defeated in the federal election on May 22, 1979. The Trudeaus were expected to move into the residence of the Leader of the Official Opposition, Stornoway, at 541 Acacia Avenue in Rockcliffe Park, but because of flooding in the basement, prime minister Joe Clark offered them Harrington Lake, the prime minister's official country retreat in Gatineau Park,
24 Sussex Drive Mounted Police officers arrested Dallaire. Measures put in place after the attempted assassination include the addition of several more guards and security cameras to the house's attaché, and the installation of crash-proof barriers within the main gates. As of January 2018, the residence is unoccupied as the National Capital Commission is drafting plans for major renovations. Unlike 10 Downing Street or the White House, 24 Sussex is used almost exclusively as a place of residence; the prime minister's work is carried out by the Office of the Prime Minister in the Office of the Prime Minister and Privy Council building,