when was it relocated?
1993
Introduction
The hall was relocated in 1993, and is now in Downtown Toronto, inside Brookfield Place, and a historic Bank of Montreal building. 
why is the hockey hall of fame in toronto Founded in Kingston, Ontario, the Hockey Hall of Fame was established in 1943.  It moved to Toronto in 1958 after the NHL withdrew its support for the International Hockey Hall of Fame in Kingston, Ontario, due to funding issues.
26 August,1961. 1958 1958
Hockey Hall of Fame Hockey Hall of Fame Hockey Hall of Fame
History Introduction Introduction
The first permanent Hockey Hall of Fame, which shared a building with the Canadian Sports Hall of Fame, was opened on August 26, 1961, by Canadian Prime Minister John Diefenbaker.  It moved to Toronto in 1958   It moved to Toronto in 1958 after the NHL withdrew its support for the International Hockey Hall of Fame in Kingston, Ontario, due to funding issues.
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Hockey Hall of Fame [SEP] Introduction
Its first permanent building opened at Exhibition Place in 1961. The hall was relocated in 1993, and is now in Downtown Toronto, inside Brookfield Place, and a historic Bank of Montreal building. The Hockey Hall of Fame has hosted International Ice Hockey Federation (IIHF) exhibits and the IIHF Hall of Fame since 1998. An 18-person committee of players, coaches and others meets annually in June to select new honourees, who are inducted as players, builders or on-ice officials. In 2010, a subcategory was established for female players. The builders' category includes coaches, general managers, commentators, team owners and others who have helped build the game.