Few asset classes have generated as much investor conversation in recent years as data centres. What was once considered a niche, operationally complex infrastructure play has moved firmly into the mainstream, attracting institutional capital, private equity and specialist REITs in volumes that have redefined what the alternative property sector looks like. For many investors the question is no longer whether data centres deserve a place in a diversified portfolio, but how to gain access to a market where quality assets are tightly held, supply is constrained and structural demand continues to build.
At their most basic, data centres are buildings that house the computing infrastructure underpinning the modern digital economy. Every cloud service, AI application, financial transaction and government database depends on what these facilities provide. As the volume of data created and consumed has grown at an extraordinary rate, so too has the requirement for the buildings that store, process and transmit it. Australia currently has approximately 1,500 megawatts of operational capacity nationally, forecast to more than double to 3,100 megawatts by 2030 at a compound annual growth rate of 13.5 per cent. Demand is outpacing supply for the first time on record, with vacancy rates across Sydney and Melbourne sitting below 10 per cent since 2024.
Australia's position within this global growth story is not accidental, with the country ranking second globally for data centre investment attractiveness. Data sovereignty legislation requires certain categories of data across financial services, healthcare and government to remain stored onshore, creating a durable compliance-driven demand base that is largely insulated from the cyclical pressures affecting other commercial sectors. Connectivity is equally important. Australia's submarine cable network is extensive and growing, with landing points across Sydney, the Sunshine Coast and Perth linking the country into Asia, the Pacific and beyond. Sydney remains the dominant interconnection hub with more than half of all subsea cables landing there, while the Sunshine Coast has emerged as a significant east coast landing point adding meaningful redundancy to the national network. Perth is gaining particular strategic significance as a gateway not only into South-East Asia but also into Africa and the Middle East, with new cable infrastructure activated in early 2026 dramatically reducing latency across those corridors and repositioning Western Australia as a compelling location for regional data processing investment.
The geography of the Australian market is shifting alongside this connectivity story. New South Wales has historically dominated, with Sydney accounting for more than half of national operational capacity and the Western Sydney corridor now carrying over 900 megawatts of live supply. Grid connection queues exceeding 18 months are, however, constraining further growth in established zones. Melbourne has moved quickly to capitalise, now the most active market in the country for new data centre construction, driven by comparatively lower land costs and greater availability of suitably zoned sites. Melbourne's share of national capacity is expected to grow significantly over the next five years. Brisbane is attracting serious new investment, with large-scale campus development underway and access to renewable energy zones offering genuine competitive advantages. Perth's emerging gateway role is drawing new operator interest, while Canberra's sovereign cloud requirements from federal government clients sustain steady demand for secure facilities, and South Australia continues to record growing activity as the national footprint broadens. Across the country there are around 30 data centre projects at various planning stages that could collectively deliver close to two million square metres of specialised space by 2030.
The physical demands of these buildings set them apart from any other commercial property type. A single 50 megawatt facility consumes the equivalent electricity of around 220 commercial office buildings, and that equation is shifting rapidly as AI-optimised infrastructure raises power density requirements dramatically. Power availability has become the primary constraint on new development nationally, making sites with existing grid infrastructure disproportionately valuable and compelling operators to think carefully about site selection years before construction begins.
Despite the sector's growth credentials, data centres carry genuine environmental, social and governance complexity. They currently account for approximately one per cent of Australia's total electricity consumption, a figure projected to reach as much as eight per cent by 2030. Cooling systems place further pressure on water resources. For listed investors and institutional groups with formal net-zero commitments, this tension is real and not yet resolved, and the transition to renewable energy sourcing, while underway, remains a work in progress across the sector.
Security is another dimension that receives less attention than it warrants. Under federal critical infrastructure legislation, facilities serving government, financial and healthcare tenants are subject to regulated physical security and cyber resilience obligations. The concentration of sensitive data within a single facility creates risks that extend well beyond the physical, making both physical and digital integrity core underwriting considerations. That said, tenant departure is rarely the risk here. The operational complexity of migrating critical IT infrastructure means renewal rates for well-utilised facilities remain high and lease terms have extended to ten years or more as supply constraints strengthen operator leverage. With yields for quality assets now sitting sub-five per cent and a funded pipeline of unprecedented scale moving through approvals, the hype has a solid foundation.
