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419 Digging Deep into Discussion: UrbanToronto’s Hottest 25 Threads of 2025
We cap off our look back at 2025 by turning to the busiest Forum threads of the year, where reader discussion most vividly reflected the forces reshaping Toronto and the Greater Holden Horseshoe. Transit once again dominated conversation, with Eglinton Line 5, Ontario Line 3, Finch West Line 6, and more driving sustained debate, speculation, and on-the-ground reporting throughout the year.
At the same time, fascination with ever-taller buildings remained strong, as threads tracking Pinnacle One Yonge, One Bloor West, Concord Sky, and other ‘supertall’ projects consistently drew engagement. Architectural interest also ran deep, with ongoing discussion around Forma, designed by the late Frank Gehry. In all, transit, height, and architecture together defined Forum and UrbanToronto activity in 2025.
Starting things off, Forum discussion tracked the transformation of the First Ontario Centre in Hamilton into the TD Coliseum, with members weighing exterior identity updates and interior fit-out details as the renovated venue reopened with major events.
24. Sugar Wharf Condos Phase 2
23. Pinnacle Lakeside Residences (Phase 1)
22. The Well
The Line 5 West Extension thread heated up as Metrolinx launched final tunnelling on the Crosstown West Extension, with updates on the last 500-metre underground segment by Weston Road, sequential excavation progress, and viaduct construction across Eglinton Flats beside the Humber River.
21. Eglinton Line 5 Crosstown West Extension
20. One Delisle
19. Cherry House at Canary Landing
18. GO Transit Electrification
Interest in The Whitfield continued as the tower neared completion, with forum photos documenting mechanical penthouse cladding, balcony guard installation, and the dismantling of its crane.
17. The Whitfield
16. Scarborough Subway Extension
15. 8 Elm
The Hurontario–Main Line 10 thread remained busy as construction carried on. No firm opening date is now fuelling debate over shifting scope, transparency, while the Finch West line’s opening is driving questions about what operational performance might be once service begins in a couple years.
12. Lower Don Lands Redevelopment
11. Concord Sky
9. Union Station Revitalization
8. KING Toronto
Cladding progress at KING Toronto accelerated through late 2025, with the installation of prefabricated glass-block glazing assemblies advancing across most exterior elevations for the Bjarke Ingels Group–designed project in King–Spadina.
7. CIBC SQUARE
Finch West Line 6 dominated late-year discussion as slow running times shocked everyone, bringing calls for stronger signal priority that platformed debate on how the new line should function, and the implications for the broader streetcar network and upcoming Line 5.
5. Forma
Ontario Line 3 remained a constant Forum focus through 2025 as members tracked construction progress across the bridges and particularly deep stations along the route.
Eglinton Line 5 dominated all discussions on UrbanToronto as testing continued and an opening date remains clouded, with Forum chatter increasingly centred on whether the long-delayed Crosstown could deliver the speed and reliability promised after 15 years of construction.
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UrbanToronto’s research and data service, UTPro, provides comprehensive data on construction projects in the Greater Golden Horseshoe—from proposal through to completion. Other services include Instant Reports, downloadable snapshots based on location, and a daily subscription newsletter, New Development Insider, that tracks projects from initial application.
