Developers propose 42-storey addition for 415 Yonge office building

415 Yonge office building
415 Yonge office building

GTA Construction Report

A rezoning application has been submitted to the City of Toronto for 415 Yonge St. proposing a 42-storey residential addition above the existing 19-storey office building, reports.  The site includes 409 through to 415 Yonge St,, as well as 9 and 17 McGill St..

Winnipeg-based Marwest Group of Companies owns the site and designs have been prepared by Kirkor Architects & Planners, the website reports. If approved, the addition would rise to a final height of 239.35 metres, increasing residential density along the Yonge subway line.

The architects have designed the addition from the 20th floor to a final height of 61 storeys, with a “pinch” design around mid height. “To create visual interest, translucent bands across the north and south massing cut through the glass facade and an angular vertical design is seen rising up the east elevation,” Urbantoronto reports. Two interstitial floors between the existing tower and addition would be included for structural and mechanical support.

“High-rise additions to existing office towers is not common, but it is not a new concept for the Toronto development scene, with construction continuing at 488 University Ave. right now,” the site says. “The 1968-built 18-storey office tower has been completely refaced with an energy-efficient curtainwall cladding system over a new support structure, while the construction of 37 new residential floors, reaching a height of 55-storeys, is underway above.”


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