TORONTO — Developers Osmington Gerofsky Development Corporation (OGDC) and WJ Properties have broken ground on the first phase of a new purpose-built rental community at St Dennis and Grenoble – Mixed-Use Rental Tower (Phase 1)StatusDesignValue$73MLocation7 St Dennis Dr, Toronto ONSectorPrivateTypeMulti-Residential · New ConstructionData as of September 30, 2026
Located at Don Mills and Eglinton and the new Don Valley Station, the 38-storey, 474-unit tower is the first of a multi-phase redevelopment of the site, and will include 20 per cent affordable housing, nearly an acre of new public parkland and a fully geothermal heating and cooling system, states a release.
The project sits on land that the Weinbaum family, operating as WJ Properties, has owned and managed for over 60 years.
“Since the late 1960s, our family has helped shape Flemingdon Park, building homes and caring for the people who live in them,â€� says Allan Weinbaum, owner of WJ Properties, in a statement. “This project is about investing in the neighbourhood’s future: more rental housing, new public space, and a building that connects residents to transit and opportunities growing around them.”
The building will run on 100 per cent geothermal energy for heating and cooling, drawn from 99 boreholes drilled hundreds of feet into the ground, the release explains, and is expected to use 60 per cent less energy and produce 80 per cent fewer greenhouse gas emissions than a comparable code-built building.
The building’s design will draw inspiration from its surroundings.
“At 9 St. Dennis, we wanted to work with that original morphology of the area and evolve the Modernist idea of the ‘tower in the park’ for contemporary life. The building rises directly from a generous, contoured common landscape, maintaining the clarity and simplicity of the original planning idea while addressing the expectations of a new generation of residents,� says Peter Clewes, principal at Architects Alliance, “That idea is expressed in the building’s composition: a slender tower, wrapped in glass and precast concrete frames, sits elegantly on a black porcelain-clad base that folds up and over a glazed double-height atrium.�
OGDC and WJ Properties have also funded a renovation of the nearby Flemingdon Park branch of the Toronto Public Library and, since 2025, have provided 25 annual scholarships to graduating students at Marc Garneau Collegiate Institute in partnership with The Neighbourhood Organization.
Through the Apartment Construction Loan program the project received $185 million in federal funding.
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