Dedicated to sustainable,
high performance building

One York Street – Toronto, ON

Commercial/Industrial [Large] Award

Jury comments: We were impressed that this tower incorporated so many innovative sustainable features, whether or not they would achieve credits on a check list. Things like individualized climate controls for office workers, and a public park rather than simply amenity space for building occupants, were notable examples of this approach.


The office building at One York Street is part of a 200,000m2 mixed-use development along the Central Waterfront in the new South Core of Toronto. One York is Toronto’s highest-scoring LEED Core+Shell certified office project to date – achieving Platinum certification at 89 points. Situated between Union Station and Lake Ontario, it occupies two-thirds of an entire city block at the foot of York Street between Lakeshore Boulevard and Harbour Street. The 35-storey office tower is one of three towers [two are residential] rising from a three-storey retail podium. The fourth floor of the podium provides public roof garden access, a shared food court and a significant health/fitness centre. Together, all connected components create a unique metropolis-like complex inspired by the Waldorf Astoria in NYC.

Alan Murphy, project lead with sustainability consultant Green Reason writes:
“With so much of the design focused on energy and water efficiency, it is critical to ensure that the building operates as designed and that occupants understand the design and remain engaged in ensuring that the operation balances with their needs.  As both owner and building manager, Menkes understands the importance of continuous  tracking, optimization and engagement with their own team and their tenants.

Tenant engagement helps property managers build a better relationship with tenants in order to create positive behaviour change in the building environment. At One York a Green Team has been created, comprised of property management and tenant representatives. Having a Green Team is one of the most effective ways of delivering a tenant engagement program and provides a platform for effective communication and collaboration to accomplish One York’s sustainability goals. Green Reason’s role is facilitating Green Team meetings and related events.

Water-conserving Solis solar-powered flushometer and Solis sensor faucets supplied by SLOAN.

Continental supplied all of the drywall for the project: Liftlite, Weather Defense, Firecheck and Mold Defense.

Project Credits
Owner/Developer Menkes Developments
Architect Sweeny &Co Architects Inc.
Structural Engineer Stephenson Engineering Ltd.
Mechanical Engineer The Mitchell Partnership
Electrical Engineer and Lighting Designer Mulvey & Banani International [Commercial]
General Contractor  EllisDon                                                                                             
LEED Consultant Green Reason
Landscape Architect NAK Design Strategies
Photos Doublespace Photography

Project Performance
Energy intensity [building and process energy] = 171.4 kWh/m²/year
Reduction in energy intensity relative to reference building = 46% [For Core and Shell  with allowance for tenant consumption, and net of contribution from PV array]
Potable water consumption = 2,362 L/occupant/year
Reduction in potable water consumption relative to reference building = 60%
Reclaimed and recycled material content by value = 15%
Regional materials [as defined by LEED] = 33%
Construction waste diverted from landfill = 88%

See 2018 Canadian Green Building Awards Winning Projects.