Therme Reveals Modified Ontario Place Spa and West Island Project

Therme Group has announced significant modifications to its Therme Spa project at Ontario Place, reducing the building size to approximately half its initial proposal. The new design, now at 33,000m², represents a response to feedback from Toronto City officials concerned about the development’s scale and impact on the natural environment of West Island.

This redesign emerges amid ongoing public discussions regarding the spa, which have sparked debate since its initial announcement. In August 2023, city staff raised alarms about the original plans, emphasizing the potential for the project to dominate the landscape and infringe upon heritage aspects while leaving limited space for public enjoyment.

The updated design, crafted by renowned architects Diamond Schmitt and STUDIO tla, will feature two main structures standing at seven (26.3m) and nine (45.15m) stories. The reduction in overall built area has been achieved by relocating the parking facilities and introducing a campus-style arrangement that distributes various program areas across several interconnected buildings rather than a single extensive block.

Inside the spa, visitors can expect a cohesive layout divided into three distinct zones: Play, Relax, and Restore. The Play area will boast a wave pool and over 20 water slides, while the Relax and Restore sections will offer a selection of mineral pools, cold plunges, and wellness facilities, including 14 saunas and 9 steam rooms, ensuring a rejuvenating experience for all guests.

Surrounding the spa, the West Island will be transformed into 16 acres of public parkland, featuring three outdoor swimming areas: a sandy beach, a lake-access pier, and accessible entry points along the shore. A public trail encircling the spa will connect seamlessly with the Martin Goodman Trail and the East Island, ensuring ease of access to all visitors. The project aims to maintain open and free parkland, with amenities such as year-round showers, changing rooms, and landscaped areas.

For improved accessibility, a multi-use trail will integrate with the spa buildings and connect to existing infrastructure, enhancing movement between the West and East Islands. Elevated pathways will offer stunning views of the water and the interior spaces of the spa, promoting an engaging outdoor experience.

Adding cultural significance, the revised plans include two new pavilions designed for community events and festivals. Indigenous design elements, including a roof feature inspired by the “Wintermaker” stars, will further enrich the project, ensuring a connection to local heritage.

Up to 10 acres of new aquatic habitats are also part of the development, featuring constructed wetlands and native vegetation. Collaboration with organizations like Trophic Design and consultation with the Mississaugas of the Credit First Nation aim to create a sustainable environment. Construction is slated to commence in Spring 2026, with an expected completion in 2029. Therme anticipates attracting 2.5 million visitors annually by the fifth year of operation.

As UrbanToronto continues to monitor this project’s progress, interested parties can access further information via our Database and participate in ongoing discussions in the Project Forum.

* * *

UrbanToronto offers a specialized research service, UTPro, that equips clients with extensive data on developmental projects across the Greater Golden Horseshoe. We also provide downloadable reports and a daily newsletter, New Development Insider, tracking all stages of development comprehensively.