High Quality Content by WIKIPEDIA articles! This list of tallest buildings in Toronto ranks skyscrapers in the Canadian city of Toronto, Ontario by height. The tallest structure in Toronto is the CN Tower, which rises 553 metres (1,814 ft). The CN Tower was the tallest free-standing structure on land from 1975 until 2007. However, it is not generally considered a high-rise building as it does not have successive floors that can be occupied. The tallest habitable building in the city is First Canadian Place, which rises 298 metres (978 ft) tall in Toronto`s Financial District and was completed in 1975. It also stands as the tallest building in Canada.