gxn stacks toronto’s construction leftovers into pop-up public space

FORM FOLLOWS WHAT’S AVAILABLE

On Toronto’s newly formed Ookwemin Minising island, bricks from demolished homes, leftover concrete blocks, utility infrastructure and even milk crates have been given another job. The Waterfront Neighbourhood Space, developed by GXN, Ha/f Climate Design, AKT II and Arcana Materials, turns material salvaged from construction and demolition sites across the city into an outdoor gathering place for sitting, playing and meeting. Less pristine material palette, more urban leftovers with somewhere useful to be.

The project reverses a familiar architectural sequence. Rather than drawing a finished object and ordering whatever is required to build it, the team first mapped materials already circulating through Toronto’s salvage stream, studying their dimensions, condition and provenance before deciding what they might become. Among them are early 20th-century bricks recovered from a demolished church and houses in the Annex, concrete masonry units left over from recent construction, concrete cores and manhole covers from utility works, and salvaged timber.

reclaimed materials shape the temporary public installation | images by Andrew Williamson

STACK, STRAP, REPEAT

Those mismatched ingredients are held together through what the team describes as a stacked-and-strapped system. Bricks and concrete blocks are piled to form supports for benches, columns and other public-space elements, then tightly strapped rather than mortared into permanent assemblies. Salvaged timber beams and columns follow a similar logic, joined with bolts so that individual pieces can eventually come apart again without being sacrificed in the process.

Designing with whatever happens to be available also means surrendering some of architecture’s usual appetite for millimetric certainty. Dimensions vary, materials arrive in different conditions and supply can change unexpectedly, so prototypes were tested off-site to establish details capable of absorbing those inconsistencies. Timber beams, for example, can be made from a single salvaged length or assembled from several shorter sections depending on what turns up, without substantially changing their role or appearance.

the waterfront neighbourhood space is located on Ookwemin Minising in Toronto

NOTHING HERE WANTS TO BE PERMANENT

That flexibility becomes particularly relevant because the Waterfront Neighbourhood Space is deliberately temporary. Every principal connection was conceived for non-destructive disassembly, allowing its bricks, blocks and timber to return to circulation once the installation closes rather than producing another neat pile of construction waste. Reclaimed material, in other words, is not treated as the final destination of a circular process but as one stop along the way.

Opened on July 4, 2026, the installation sits within the 39.6-hectare Ookwemin Minising development, surrounded by the new Biidaasige Park and wetlands created as part of Toronto’s flood-protection landscape. The pop-up will remain in place through late fall, providing shade, seating and room for events and informal play while the wider neighborhood continues to take shape. It is a modest piece of infrastructure, but one that proposes a larger question: what if cities stopped seeing yesterday’s buildings as waste and started treating them as tomorrow’s material catalogue?

the project transforms construction leftovers into seating and gathering areas