100 Adelaide St West Office Tower

100 Adelaide St. West (100 ASW) is a 1,000,000 sq. ft. (92, 903 m 2 ) office tower on the site of a demolished historic office building. The new 42-storey tower retains the South and East sides of the original façade, together with its lighting fixtures and lobby, to maintain the important heritage of the former building, called the Concourse, which was built in 1928.


  • Toronto, Ontario, Canada


  • Oxford Properties

Project Status

  • Completed in 2017


  • Kohn Pederson Fox, WZMH

Innovative Technology Solutions for Improved Automation

EY is the anchor tenant of the new building which is now often called the EY Tower. With occupant wellness in mind it features floor to ceiling windows, allowing daylight to flood the interior space, and as a further way to promote a healthy lifestyle amongst occupants, changing rooms, showers and bike parking have been integrated into the design.

WSP provided electrical engineering, civil engineering, IT and security consulting services for this high-rise office tower. We integrated an efficient direct/indirect lighting system, along with daylight harvesting and occupancy based dimming control to optimise energy consumption.

100 ASW was designed and built with one integrated communication network for Building Automation System (BAS), electrical, metering, lighting, security, elevators, window controls, Wi-Fi, wayfinding and data service. We used over 91km of Power Over Ethernet (PoE) Cat6 cables for different systems such as heating valves, CCTV cameras and access control, improving reliability and safety as well as flexibility, and we integrated IP-based security and CCTV monitoring systems to reinforce security within the building. It is a complete end-to- end IP-based system directly integrated with the building’s centralised automation platform. To ensure continuous energy performance within the building, electronic sub-metering has been installed to monitor usage and wastage for all systems.

In order to support the tenants’ green initiatives, the client worked through a highly integrated design and construction process to incorporate the broad range of ambitious sustainability and energy strategies that are present in the completed building. Sustainability measures include a green roof to minimise urban heat island effect, a rainwater cistern for irrigation, low flow plumbing fixtures and the use of materials that have been manufactured and extracted locally. Other examples of energy efficiency measures include a high-performance envelope, a dedicated outdoor air system with CO2 control providing on-demand ventilation directly to interior spaces, a connection to Enwave deep lake water cooling, and LED lighting with occupancy and daylight control. Through various initiatives we helped our client obtain LEED Platinum certification for the building