Here's why both cities deserve to see you this last chance of 2026, and what it means for your brand if you're not there.

Perth: the fastest-growing capital in the country

Perth added over 58,000 people in the 2024-25 financial year alone, the highest growth rate of any Australian capital, driven largely by net overseas migration and continued interstate relocation. That population growth is translating directly into build activity. The Western Australian construction market is on track to reach $30 billion by 2026-27, with commercial construction alone expected to climb toward $4.85 billion, according to Master Builders WA.

Detached housing approvals and commencements have surged, putting WA at the front of the pack for new home building nationally, while resources-linked infrastructure, mining facilities, and greenfield community masterplans continue to anchor long-lead work for design teams. Western Australia has topped CommSec's State of the States report for economic performance for five consecutive quarters running, and CommSec Chief Economist Ryan Felsman named WA, alongside Queensland and the Northern Territory, as "best positioned heading into 2026." The Institute of Public Affairs' 2026 State Economic Scorecard backs this up, ranking WA the best-performing state in the country overall. For suppliers, that's a market with the confidence and capital behind it to keep specifying and building at pace, not one that's about to cool off. 

For a supplier, that's the opportunity. When a market is this stretched, specifiers aren't browsing, they're deciding. Being physically present, with product in hand and a real conversation on offer, puts your brand in the room at exactly the point those decisions are being made.

Images: Taken at the recent The-Arc ICONICA event in Perth, May 2026

Adelaide: a specification market being reshaped by AUKUS

Adelaide's growth story looks different but is just as compelling. The AUKUS submarine and shipyard build-out is catalysing long-term construction spending across infrastructure, industrial facilities, and the housing needed to support the workforce behind it. At least $30 billion is being invested at Osborne alone to build the submarine construction yard, and South Australian Premier Peter Malinauskas has called it "a watershed moment for the South Australian economy," with the scale of the work coming Adelaide's way described as difficult for most people to comprehend. Add to that Adelaide's ongoing tunnelling and transit infrastructure works, and the city is seeing a construction cost escalation of around 5 to 5.1%, among the strongest of any Australian capital. 

This year's South Australian Architecture Awards told a similar story: a profession delivering award-winning work despite rising costs, housing pressure, and global uncertainty, with juries specifically recognising projects that balance heritage, sustainability, and community-led design. That's a market of specifiers actively looking for products that help them do more with tighter budgets and tighter timelines, exactly the conversation a well-prepared supplier stand is built for.

Adelaide is also a market at an inflection point. As the AUKUS build-out shifts from announcement to construction, the specifier base and project pipeline are recalibrating in real time, and Adelaide's tighter, closer-knit specifier community means the relationships built at a stand here tend to carry further than they would in a bigger, noisier market. Getting in front of that community now, while the pipeline is still taking shape, is what sets a brand up to be the default choice once the AUKUS-driven spend hits full scale.

Images: Taken at the recent The-Arc ICONICA event in Adelaide, May 2026 

What exhibiting here actually means for your brand

Specification marketing works because it puts your product in front of the people who choose what gets built, before the tender, before the drawing is locked in. Perth and Adelaide are two markets where that window is wide open right now:

• You get there before the market saturates. Both cities are growing faster, relatively speaking, than the specification marketing spend chasing them. Early, consistent presence builds recognition before your competitors catch on.
• You meet the specifiers driving the pipeline, not just reading about it. Face-to-face conversations at a stand build the kind of trust and product recall that a digital ad or email simply can't replicate.
• You show suppliers back home you're serious about national coverage. For teams still weighing up whether to expand beyond the east coast, a stand at Radically Human 2026 is a low-risk way to test both markets in one campaign.
• You build a base for the AUKUS and mining-linked spend that's coming. Relationships built now in Adelaide and Perth put your brand ahead of the specification cycle tied to defence, resources, and infrastructure investment already locked in for the years ahead.

Two dates, limited stands

The-Arc 2026 is heading to Adelaide on 10 September and Perth on 17 September, and stands are limited. Given how tight both specification markets already are, we don't expect these stands to stay available for long.

If you want your brand in front of the architects, interior designers, and specifiers shaping two of Australia's fastest-moving building markets, now is the time to lock in your stand.

Last updated: 14 July 2026