Anthropic signs first-stage lease documentation for the Western Downs Digital Park.
The proposed $31.9 billion Western Downs Digital Park near Dalby has moved beyond a pure development proposal after a consortium involving Zerra DC, Macquarie Capital and Australian Data Centres entered lease documentation with an Australian subsidiary of Anthropic for delivery of the first stage of the campus.
Dexus disclosed the agreement on 16 September 2026. Australian Data Centres, in which Dexus holds an 85% interest, owns a 25% interest in the project consortium. The lease documentation is still subject to customary approvals, and Dexus says future funding obligations remain subject to further approvals, including Dexus board approval where applicable.
For Queensland contractors and suppliers, this is a material commercial signal rather than a construction award. A globally significant AI customer has now committed to the proposed campus at lease-documentation level, but development approval, investment decisions, capital formation, detailed design, energy connection arrangements and procurement still sit ahead.
Anthropic has become the first disclosed customer for the Western Downs campus
Dexus’ ASX update says Australian Data Centres holds a 25% interest in a consortium with Zerra DC and Macquarie Capital in connection with the proposed development of a hyperscale data-centre campus for an Australian subsidiary of Anthropic in Queensland’s Western Downs region. Macquarie Capital is also acting as financial adviser to the consortium.
The consortium has entered into lease documentation with Anthropic’s Australian subsidiary for delivery of the first stage. Dexus did not disclose rent, lease term, first-stage capital cost, a contractor, construction commencement date or an unconditional funding commitment.
That distinction is important. A customer lease can materially improve bankability and demand certainty, but it is not equivalent to development approval, financial close or a notice to proceed. Dexus explicitly states the arrangement remains subject to customary approvals.
The disclosed consortium adds a new layer to the project’s ownership and funding picture
Zerra DC, Macquarie Capital and Australian Data Centres are now part of the disclosed first-stage delivery structure
Australian Data Centres is 85% owned by Dexus and holds a 25% interest in the consortium. Dexus says ADC is conducting a capital raising to introduce additional capital partners. Dexus may participate, but had not made a decision at the time of the announcement.
Future ADC obligations to fund the first stage and later stages remain conditional on customary approvals. Dexus also notes that its own board approval may be required for future participation. That makes capital formation one of the most important near-term signals for industry to watch.
The structure matters because the project is no longer only a developer-led planning proposal. It now has a named customer, an institutional capital participant and a financial adviser disclosed in the same transaction framework.
The underlying Western Downs proposal remains enormous in industrial-infrastructure terms
The project previously lodged with Western Downs Regional Council covers about 725.5 hectares at 1933 Dalby–Kogan Road, roughly 37 kilometres north-west of Dalby. The initial proposal comprises four AI-ready data-centre buildings of about 360MW of IT capacity each, or around 1.44GW in total.
Planning material has also contemplated later expansion beyond the initial four buildings. Public reporting has described a potential campus capacity of up to about 2.16GW at full expansion. The proposed $31.9 billion figure should continue to be treated as a full-build investment estimate rather than a single construction contract or money currently available to suppliers.
The site was selected in a region with major generation and transmission infrastructure. The development application and public project material identify a significant electricity requirement, on-site power-conditioning infrastructure and a cooling strategy designed to limit water use compared with conventional evaporative cooling approaches.
At this scale, the project is as much an energy, civil, electrical and regional-logistics development as it is a technology project. Data halls sit at the end of a much broader chain involving grid interfaces, substations, transformers, roads, drainage, building structures, mechanical systems, fibre, security and integrated commissioning.
The route from signed lease documentation to construction still contains major gates
Customer commitment strengthens the case, but approvals and capital remain decisive
The development application remains under assessment. The Anthropic arrangement is also subject to customary approvals, and public reporting indicates Foreign Investment Review Board approval remains relevant to the transaction.
ADC’s capital raising is another live dependency. Additional capital partners would strengthen the financing platform for the first stage, while detailed project funding and Dexus participation remain conditional.
Only after planning, commercial and investment gates are sufficiently advanced should industry expect stronger evidence around delivery model, major contractor appointments, long-lead procurement and staged construction packages.
- Anthropic Australian subsidiary named as first-stage customer.
- Lease documentation entered for delivery of the first stage.
- Consortium includes Zerra DC, Macquarie Capital and Australian Data Centres.
- ADC holds a 25% consortium interest.
- Dexus owns 85% of ADC.
- ADC is conducting a capital raising for additional capital partners.
- Customary transaction and project approvals.
- Development application outcome.
- FIRB and other applicable approvals.
- Final funding structure and capital commitments.
- Dexus board approval where applicable.
- Detailed design and energy connection arrangements.
- Delivery model, contractor appointments and work packages.
- Construction commencement and commissioning timing.
For contractors, the signal has improved from concept exposure to customer-backed readiness
The strongest opportunities remain future-facing, but the probability of staged delivery has increased
Potential capability areas remain broad: bulk earthworks, roads and drainage, major concrete and structural packages, high-voltage substations, transformers and switchgear, resilient electrical distribution, battery-backed conditioning, mechanical cooling, fibre, controls, security, fire systems, heavy logistics and integrated commissioning.
The new customer commitment makes those workstreams more commercially relevant to monitor, but it does not convert them into live tenders. Suppliers should watch for project-team appointments, grid-connection milestones, capital-close signals, early works, supplier registration, EOIs and formal procurement notices.
Western Downs also creates a regional delivery challenge. Workforce accommodation, freight, heavy transport, local subcontracting, water and wastewater services, and ongoing operations support could become meaningful secondary markets if staged development proceeds.
What contractors and suppliers should watch next
Project Watch tracks the project signal. The BBI Directory helps project teams and contractors identify firms across Queensland’s industrial supply chain.
Sources and primary references
- Dexus — ASX release, Australian Data Centres – Western Downs Digital Park, 16 September 2026.
- ABC News — Anthropic agreement for Western Downs data-centre project, 16 September 2026.
- Zerra DC — Western Downs Digital Park project information.
- BBI — original Western Downs Digital Park Project Watch coverage, 1 September 2026.