Toronto’s former Downsview Airport site is being transformed into a large-scale urban development project named YZD, marking one of the most ambitious city-building initiatives in North America. Led by Northcrest Developments, the 370-acre area is planned to evolve into a multi-neighbourhood city integrating housing, employment zones, public spaces, and cultural infrastructure.
From Aviation Hub to Urban Fabric
Once a major aviation and aerospace site used for decades by Bombardier and previously as a Royal Canadian Air Force base, the Downsview Airport officially closed in 2024, ending nearly a century of operational history. The land was later acquired by Northcrest Developments, which initiated a long-term redevelopment vision for the site.
The transformation marks a structural shift from industrial aviation use to mixed-use urban living, repositioning the site as a future residential and economic center within Toronto’s expanding metropolitan region.
A Multi-Neighbourhood City Concept
The YZD masterplan envisions the creation of seven distinct neighbourhoods across the former airport lands. Upon completion, the development is expected to accommodate more than 30,000 new homes and support tens of thousands of residents, alongside commercial, cultural, and employment spaces.
Each neighbourhood is designed with a mixed-use structure, combining residential buildings with retail, office, and community infrastructure. The development is also structured around transit connectivity and pedestrian-oriented design principles.
The Runway as a Public Space
A defining feature of the project is the adaptive reuse of the former 2-kilometre runway. Instead of aviation operations, the runway is being reimagined as a central pedestrian corridor and public space connecting the entire district.
Existing hangar structures are also planned for preservation and repurposing, integrating the site’s aviation heritage into new cultural, commercial, and community uses.
Scale, Housing, and Long-Term Development Horizon
The overall investment in the YZD project is estimated at approximately $30 billion, with development expected to unfold over several decades. The masterplan includes not only residential expansion but also significant allocations for green space, public infrastructure, and employment zones.
Once fully completed, the district is projected to house more than 55,000 residents and generate substantial employment opportunities, making it one of the largest urban regeneration projects in North America.
A Long-Term Urban Transformation Strategy
YZD is being developed as a phased, multi-decade project designed to convert a former industrial aviation site into a fully integrated urban district. The approach prioritizes walkability, mixed-use density, and the reuse of existing infrastructure as key components of its planning framework.
With its scale and positioning, the project represents a significant example of airport-to-city transformation, reflecting a broader global trend in adaptive urban redevelopment strategies.
