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One Bloor West and SkyTower at Pinnacle One Yonge continue to climb as the future ‘supertalls’ remain mainstays in UrbanToronto’s most viewed Database files and most active Forum threads. Both towers now stand at 85 storeys, yet despite this numerical tie, One Bloor West holds a significant lead in height for the time being, having reached the 300m mark as construction begins on its crown. It's a clear reminder that storey count alone does not determine a building’s stature: varying floor-to-floor heights and crown structures determine the final measurement.
UrbanToronto last reported on Tridel's One Bloor West in June, 2025, when the tower, designed by Foster + Partners with Core Architects, reached the ‘supertall’ threshold of 300 metres, while in May, 2025, UrbanToronto provided an update and a tour of Pinnacle International's SkyTower at Pinnacle One Yonge, designed by Hariri Pontarini Architects.
A Minor Variance application submitted earlier this year reclassified part of SkyTower’s mechanical penthouse as habitable space, officially adding a 106th storey without altering the tower’s massing or footprint. The same application also raised ceiling heights on its upper residential floors, contributing to its final planned height of 351.85m. In contrast, One Bloor West achieves 308.6m over just 85 storeys through taller floor-to-floor spacing.
A look at their tops via their architectural drawings reveals why One Bloor West currently stands taller at 85 storeys than SkyTower does, even if SkyTower will eventually surpass it by quite a bit. The design for One Bloor West shows the Level 85 concrete slab at 292.275m, while the crown that will enclose its tuned mass damper (TMD) will take the building to 308.6m. A couple of steel beams that will be part of the crown currently peak out just above 300m.
By contrast, SkyTower reaches only 263.85m at its 85th floor slab, with another 21 floors plus mechanical penthouse levels and TMD still to go before it tops out. Notably in the image below, floor heights are recorded as above sea level as opposed to above average grade, so we have adjusted four key heights (seen in red) by subtracting 76.8m from the total, to account for the average grade's height relative to sea level.
It's the levels below that make the most difference: One Bloor West has several extra-height floors at and near ground level, while SkyTower's are not quite as ambitious. As one goes up the buildings as well, One Bloor West's typical floor height is 3.3m from top of slab to the next, while SkyTower's is 3.25m, just 5cm less. While that difference adds up over many floors, One Bloor West also boasts four two-level, mid-tower mechanical sections that are each 9.075m tall, which are also taller than three pairs of extra-height floors on SkyTower where horizontal banding can be seen.
Looking north up Yonge Street, One Bloor West's unique exterior is marked by megacolumns from which brackets extend diagonally, holding up the corners of each set of six floors, grouped into 18-storey sections separated by recessed mechanical levels. The building's black-screened Rail Climbing System (RCS) has reached about the 65th floor, with cladding installation happening behind it.
Looking from near the top of One Bloor East just across the street to One Bloor West's uppermost levels, the concrete megacolumns rise to Level 85, while recently erected steel beams project upward from its crown, marking the start of framing for the building’s tuned mass damper enclosure. Along the sides, blue weather protection panels remain in place, following the removal of multiple corner scaffold units and side-facing forms, enabling corner slab pours to catch up to the core.
Looking north to SkyTower, the tower is just reaching its 85th storey. The curved massing features white vertical fins that accent the tower’s verticality. While the RCS-G screens obscure the uppermost floors, the two horizontal accent bands at the 56th and 57th floors serve as clear visual markers, allowing viewers to estimate the floor count upward to the top. Compared to One Bloor West, SkyTower presents a more fluid and continuous envelope, achieved through a unitized curtainwall system with fewer horizontal accents.
Finally, this closer view looking southeast shows the north elevation glazing installed up to the 58th floor, just above the horizontal accent bands at floors 56 and 57, while the curtainwall glazing now enclose parts of the 62nd level. At the top, black protective screens encircle the RCS-G, compared to the blue screens atop One Bloor West. Behind it to the left, the 65-storey Pinnacle One Yonge first phase tower, The Prestige, stands at 217m.
Ultimately, Pinnacle One Yonge's SkyTower will far surpass One Bloor West in height. Once the construction of the 96th floor walls that will hold up the 97th floor are underway, SkyTower will reach the 300m threshold, but it will keep going past One Bloor West's 308.6m crown to finish off at 351.85m, higher than any other building now under construction in Canada, or even planned.
UrbanToronto will continue to follow progress on these developments, but in the meantime, you can learn more about them from our Database files, linked below. If you'd like, you can join in on the conversation in the associated Project Forum thread or leave a comment in the space provided on this page.
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UrbanToronto has a research service, UTPro, that provides comprehensive data on development projects in the Greater Golden Horseshoe — from proposal through to completion. We also offer Instant Reports, downloadable snapshots based on location, and a daily subscription newsletter, New Development Insider, that tracks projects from initial application.
