Tall buildings are not new for Toronto. In the past decade, the city has seen more high-rise development than any other in North America. However, over the next several years a new type of tall building will be making its way onto the city skyline - the supertall skyscraper.

According to the Council on Tall Buildings and Urban Habitat (CTBUH), a ‘supertall skyscraper’ is a tall building 300 meters (984 feet) or taller. Currently, there are more than 180 supertalls globally.

Toronto’s tallest structure, The CN Tower, rises 553 metres, but falls under the classification of a tower, where the less than 50 percent of its height is occupied. Toronto’s tallest building, First Canadian Place, is a 72-storey office tower that rises 298 metres — just 2 metres shy of supertall status. Constructed in 1975, it has held that title for nearly 50 years.

With the city well into a 10+ year development boom, there are now 7 supertall skyscrapers in development, 2 of which are already under construction.

Height comparison of supertall skyscrapers in Toronto.Image Credit: Stephen Velasco

1) SkyTower at Pinnacle One Yonge — Under Construction at 345 metres / 105-storeys

Rising from the foot of Canada’s longest street, SkyTower at Pinnacle One Yonge is the second phase in a multi-tower development near Toronto’s waterfront. Currently under construction, the 105-storey mixed-use tower will contain residences, a hotel, commercial offices, retail, and community spaces. The tower is designed by Toronto-based architecture firm Hariri Pontarini.

Upon completion, the building will become the first building in Canada to surpass the 100-storey mark.

Image Credit: Hariri Pontarini Architects

2) The OneUnder Construction at 328 metres / 91-storeys

Situated on the south-west corner of Yonge and Bloor, Mizrahi Development’s The One is making its mark on the northern edge of the Downtown Core. Designed by UK-based architects Foster+Partners, the 91-storey mixed-use skyscraper will contain residences, a hotel, and commercial retail space.

Despite news in late 2023 that the project has been placed under receivership, construction currently continues on 'The One' at the time of writing.

Image Credit: Foster + Partners

3) Forma (West Tower)Approved at 308 metres / 82-storeys

At the corner of King and Duncan in the Entertainment District, Forma West is an 82-storey mixed-use skyscraper proposed by Great Gulf, Dream Unlimited, and Westdale Properties. It is the second phase in a two-tower development designed by world-renowned architect, Frank Gehry. The shorter 73-storey east tower broke ground in fall 2023, and is currently under construction.

Upon completion, both buildings will contain residences, commercial, and institutional spaces.

Image Credit: Gehry Partners, LLP

4) One Yonge (Phase 3)Approved at 305 metres / 92-storeys

The third phase of Pinnacle One Yonge will rise immediately next to its taller sibling, SkyTower, and will contain residential condominiums across its 92-storeys. The tower is also designed by Toronto-based architecture firm Hariri Pontarini.

Image Credit: Hariri Pontarini Architects

5) Union Park (East Tower)Approved at 303 metres / 60-storeys

Union Park East is the tallest of a massive 4-tower complex proposed by Oxford Properties along Front Street West. The 60-storey skyscraper designed by Pelli Clarke Pelli Architects is one of two office towers proposed for the site.

Image Credit: Pelli Clark & Partners

6) 15 Bloor St WProposed at 302 metres / 94-storeys

The latest supertall proposal in Toronto rises immediately next to another supertall under construction (The One). Plans from developer Reserve Properties call for a 94-storey residential tower designed by IBI Group.

Image Credit: IBI Group

7) 191 BayApproved at 301 metres / 64-storeys

The final supertall on the list is QuadReal Properties’ 191 Bay, which will rise above Commerce Court in Toronto’s Financial District. The 64-storey skyscraper, designed by Toronto-based architecture firm Hariri Pontarini, contains commercial office space and would feature one of the city’s highest observation decks.

Image Credit: Hariri Pontarini Architects


While it remains to be seen whether all of these supertall developments will be built, or completed at their proposed heights, Urbanize Toronto will continue to monitor these projects closely as they progress through the various stages of development.