The tallest building in Toronto is SkyTower at Pinnacle One Yonge, at 351.4 metres with 106 floors, completed in 2026. It ended a fifty-year run by First Canadian Place, which had held the title since 1975 at 298.1 metres. The CN Tower is considerably taller than both at 553.3 metres, but it is a free-standing observation and communications tower rather than a building, and it does not appear in building rankings anywhere in the world.
Tower Versus Building
The distinction is not pedantry. The Council on Tall Buildings and Urban Habitat defines a building as a structure in which at least half the height is occupied by usable floor space. The CN Tower has a pod near the top and a hollow concrete shaft below it, so it fails that test by a wide margin.
The same rule separates Sydney Tower from Crown Sydney, the Ostankino Tower from Moscow's skyscrapers, and the Tokyo Skytree from anything in Japan's building lists. All of them are taller than the tallest building in their cities, and none of them counts.
The CN Tower was the world's tallest free-standing structure of any kind from 1975 until the Burj Khalifa passed it in 2007 — 32 years, a record run. It remains the tallest in the Western Hemisphere.
Fifty Years of First Canadian Place
First Canadian Place opened in 1975 as the head office of the Bank of Montreal, at 298.1 metres and 72 floors. It was the tallest building in Canada for half a century and the tallest bank building in the world.
The original cladding was 45,000 slabs of Carrara marble, chosen by the developer Olympia and York, and it was a mistake. Thin marble panels warp when exposed to repeated freeze-thaw cycles, and by the 2000s panels were bowing and occasionally falling. The entire facade was replaced with white glass between 2009 and 2012 at a cost of over 100 million dollars.
The same problem affected the Standard Oil Building in Chicago and the Finlandia Hall in Helsinki. Carrara marble in a cold climate is one of the better-documented failures in twentieth-century facade design.
The Building That Took the Record
SkyTower at Pinnacle One Yonge stands on the waterfront at Yonge and Queens Quay, part of a multi-tower development by Pinnacle International on a site that was previously the Toronto Star building. It is residential, with 106 floors of condominium apartments.
Its 351.4 metres put it well clear of First Canadian Place and make it the tallest building in Canada. It is not, however, the tallest that was planned to hold the title.
One Bloor West, formerly branded as The One, was designed by Foster and Partners at 308.6 metres and 85 floors at Yonge and Bloor. It topped out in late 2025 and was briefly Canada's tallest before SkyTower overtook it, and it has been through receivership, a change of developer and a redesign. Completion is expected around 2028.
Toronto Builds More Towers Than Anywhere in North America
Toronto has had more high-rise buildings under construction than any other city in North America for over a decade, usually by a factor of two or three over New York. In some years the count of active cranes in Toronto has exceeded the combined total of the ten busiest American cities.
Almost all of it is residential condominium development. Toronto's population has grown rapidly through immigration, Ontario's greenbelt legislation constrains outward sprawl, and provincial policy since 2006 has directed growth into intensification nodes — which in practice means condo towers.
The result is a skyline that is broad rather than tall. Toronto has well over 200 buildings above 150 metres and until 2026 had none above 300 metres, a profile shared with few large cities.
The PATH Runs Underneath
Toronto's downtown towers are connected by PATH, a network of underground pedestrian tunnels running to about 30 kilometres and linking more than 70 buildings, six subway stations and Union Station. It is one of the largest underground shopping complexes in the world.
It exists because of the winters. Office workers can move between the financial district towers, the hotels, the rail terminal and the sports venues without going outside, and around 200,000 people use it on a weekday.
It also shapes how the towers are designed. Retail concentrates one or two levels below ground rather than at street level, which is one reason parts of downtown Toronto feel emptier at pavement level than their density suggests — a criticism the city's own planning documents have made.
Why Toronto Went Up Rather Than Out
Ontario's Greenbelt, established in 2005, permanently protects around 800,000 hectares of farmland and countryside around the Greater Toronto Area from development. Combined with the Places to Grow Act of the same period, which set intensification targets for existing built-up areas, it closed off the sprawl that had absorbed growth for fifty years.
The region has been adding on the order of 100,000 people a year, driven almost entirely by immigration, and Toronto proper is now over three million. Housing that population inside a fixed boundary produces towers.
The provincial government's attempt in late 2022 to open parts of the Greenbelt to development was reversed in 2023 after an auditor general's report, and the resulting political controversy made the boundary harder to move rather than easier. Toronto's vertical growth is a planning outcome as much as a market one.
The Financial District
The bank towers around King and Bay are the older core of the skyline and are still the most recognisable part of it. Scotia Plaza at 275 metres, clad in red Napoleon granite; the black anodised aluminium of Mies van der Rohe's Toronto-Dominion Centre from 1967 and 1969; Commerce Court West at 239 metres; and the gold-coated glass of Royal Bank Plaza, which contains around 70 kilograms of gold in its window coating.
The Toronto-Dominion Centre is the significant one architecturally. It was Mies van der Rohe's largest commission and the purest expression of the International Style in Canada, and it reshaped what Canadian office buildings looked like for two decades.
The Canadian Bank of Commerce Building at 25 King Street West, completed in 1931 at 145 metres, was the tallest building in the British Empire for over three decades. It is now dwarfed by the towers around it.
The CN Tower
Canadian National built the tower between 1973 and 1976 to solve a genuine engineering problem: Toronto's new generation of skyscrapers was blocking broadcast signals, and a transmitter above them was needed.
It rises 553.3 metres, with the main pod at 346 metres holding the observation deck, the glass floor and the revolving restaurant, and the SkyPod at 447 metres. The EdgeWalk, opened in 2011, lets harnessed visitors walk on a ledge outside the main pod at 356 metres.
Construction used a hydraulic slipform that rose continuously, and the flagpole antenna at the top was placed by helicopter in 36 lifts over three and a half weeks. It receives around two million visitors a year and remains the most visited paid attraction in Canada.
Toronto's Height Constraints
Billy Bishop Toronto City Airport, on an island a few hundred metres from the waterfront, imposes a flight-path restriction that limits heights along parts of the harbour. That constraint has shaped where the tallest waterfront buildings can go.
Toronto also protects certain view corridors, most notably sightlines to the CN Tower and to the Ontario Legislative Building at Queen's Park, and the city's Tall Building Design Guidelines govern setbacks, tower separation and shadow impact on parks and streets.
Unlike Paris or Washington there is no citywide height cap. The controls are site-specific, which is why the skyline can rise from six storeys to a hundred within a couple of blocks.
What Is in the Pipeline
Several Toronto towers are approved above 300 metres. Concord Sky at Yonge and Gerrard is designed at around 306 metres; the SkyTower's siblings at Pinnacle One Yonge are shorter but substantial; and proposals at Yonge and Bloor and along the waterfront continue to be filed.
The condominium market slowed sharply from 2023 as interest rates rose and presale absorption fell, and several approved projects have been shelved or resubmitted at lower heights. Toronto's pipeline of approvals is now considerably larger than its pipeline of construction starts.
Whether SkyTower holds the record for long depends on that market rather than on planning. The approvals for taller buildings already exist.
Seeing It
The CN Tower's main deck is the standard view and includes the glass floor and the outdoor terrace. Booking a table at 360 Restaurant includes admission, which frequently works out cheaper than the observation ticket alone.
For the skyline itself rather than the view from it, the Toronto Islands ferry gives the classic photograph, with the whole downtown behind the harbour. Polson Pier on the eastern waterfront gives the same view with fewer people, and the Riverdale Park East slope looks across the Don Valley to the towers.
The Toronto Islands view is the one that appears on postcards, and it has changed more in the past fifteen years than in the previous fifty. For comparisons, see the tallest building in New York and the count of countries in North America.