• Asset: AirTrunk SYD3 data centre campus, Eastern Creek, Western Sydney
• Financing: $4.25 billion green loan (roughly US$2.8 to US$3 billion, depending on the conversion used)
• Lenders: a consortium of 32 local and international financial institutions, with 14 banks underwriting the facility
• Site: about 8.3 hectares
• Floor space: about 70,000 sqm of technical data hall space plus about 9,600 sqm of office and storage
• Builder: A W Edwards is leading the expansion
• Status: under construction, completion expected by mid-2028
• Owner: AirTrunk, backed by Blackstone
• Announced: 27 October 2026

This is not a sale or a lease. It is construction finance. That makes it a different kind of signal. Banks lending against a building that is still going up are betting on its future income and its ability to get finished on time and on budget.

The loan is set up as a green facility. Reporting on the deal says it carries margin adjustments tied to sustainability outcomes and that any savings AirTrunk makes through that structure will be directed into the company's social impact programme. AirTrunk has linked the financing to its Net Zero 2030 emissions target.

AirTrunk's vice president of origination and market expansion, Tom Mackellar, described SYD3 as a long-term investment in Western Sydney and in Australia's digital capability.

SYD3 sits in Eastern Creek, the industrial and logistics belt along the M4 and M7 that has become one of the country's main data centre clusters. The site covers roughly 8.3 hectares. Plans allow for around 70,000 sqm of technical space where the servers and cooling equipment live, plus close to 10,000 sqm of office and storage.

AirTrunk has not put a public megawatt figure on SYD3 in the financing announcement. What it has said is that its Australian platform now runs across five campuses with more than 1.2 gigawatts of capacity.

The numbers behind the business are large. AirTrunk says it has invested more than $12 billion in Australian projects so far and plans to invest a further $75 billion over the next decade. That second figure is a forward plan rather than committed spending. Its committed debt funding sits at about $38.4 billion globally, with more than $19.8 billion of that tied to Australian projects.

Blackstone and CPP Investments bought AirTrunk in 2024 in a deal valuing the business at more than $24 billion, which remains one of the biggest private property and infrastructure transactions in Australian history. SYD3 is part of what that money was buying: a pipeline of hyperscale campuses that can be built out over years.

Thirty-two institutions is a deep book. A syndicate of that size tells you banks are comfortable with data centre construction risk in Western Sydney, which was not a given a few years ago when the asset class was still treated as specialist.

The lenders are backing three things. First, the sponsor, with Blackstone's balance sheet and a long record of AirTrunk delivering campuses. Second, the location, with Eastern Creek offering power, fibre and zoning that are hard to find closer to the city. Third, the demand, as cloud providers and AI workloads keep soaking up capacity.

CBRE released research this week arguing that AI is pushing data centre demand into its next phase of growth. Construction lenders clearly agree.

Eastern Creek was built for big sheds. Large flat lots, heavy-vehicle access to the M4 and M7 and a planning framework that already expects industrial noise and traffic have made it the natural landing spot for operators who need scale.

Those same qualities suit data centres. The cluster effect matters too. Once a few hyperscale campuses are in place, fibre routes, substations and specialist contractors follow. Each new project makes the next one easier to justify to a lender.

The contrast with inner and north shore proposals is sharp. Operators there are trying to get closer to users and existing networks, but they run into tight sites, nearby homes and local water and power limits. Western Sydney offers more room to breathe, which is exactly what a campus with 70,000 sqm of technical space needs.

For landowners, the lesson is that the precinct itself has become part of the value. A site in an established data centre cluster carries an advantage that a similar-sized block elsewhere cannot easily match.

October has been a busy month for Sydney data centres and the pattern is worth noting.

• Microsoft, Honeman Close, Huntingwood: NSW planning consent granted on 1 October for a 96MW IT load campus with 40 data halls over five floors, at a capital cost the department put at about $1.26 billion. Federal environmental approval is still pending.
• Stockland, 1-5 Khartoum Road, Macquarie Park: approved the same day, a $630.4 million project with 34.3MW of IT load on the former Johnson & Johnson campus.
• Goodman, Project Mars, Lane Cove West: withdrawn days earlier. The 81MW, $798 million plan drew 374 public submissions, only nine of them supportive. The site sat about 20 metres from the nearest house.
• GreenSquare SYD1, 3 Brookhollow Avenue, Norwest: first 15MW stage brought online, with an 80MW second stage in the planning system.
• CDC, Marsden Park: a 504MW campus under way in Sydney's north-west.

The common thread is simple. Projects on genuine industrial land with good power access are getting approved and funded. Projects pushed close to homes and schools are getting stuck or abandoned.

For industrial landholders in Eastern Creek, Huntingwood, Minchinbury and the wider M4 and M7 corridor, a $4.25 billion construction loan is a strong vote of confidence. Data centre operators compete with logistics users for large, flat, well-serviced sites. Every campus that gets funded adds another reason for buyers to pay up for land with power capacity.

It also shifts the conversation around power. Grid connection is now the scarce ingredient, not land. Sites with an approved or credible pathway to a substation connection are trading as a different product from sites that only have zoning.

For the construction market, a project of this scale ties up trades, crane time and electrical contractors for years. That has knock-on effects for build costs and timing on other industrial projects in the area.

And for the wider commercial market, it shows how much capital is chasing digital infrastructure while office and retail investors are still working through repricing. Debt is flowing freely to this sector in a way it is not to many others.

• Power is the headline. If a site has a realistic power story, put it front and centre. Buyers in this sector look at megawatts before they look at hectares.
• Neighbours matter. Goodman's Lane Cove West retreat shows how fast community opposition can sink a project. Show buffers, noise treatment and traffic plans early.
• Explain the future clearly. A campus that will not finish until 2028 has to be sold to lenders, tenants and councils years before it exists. Clear plans, staging diagrams and renders help everyone understand what is being built.
• Sustainability is now priced. Green loan margins reward measurable outcomes. Owners who can document energy, water and emissions performance have a real lever on their cost of capital.

Watch for the federal environmental decision on Microsoft's Huntingwood campus, which is the last hurdle before work can start. Watch AirTrunk's Kurri Kurri proposal in the Hunter, which is on exhibition until 11 November, to see whether the operator's next big campus heads further out of Sydney. Watch the national data centre standards that the Commonwealth plans to legislate in early 2027, which could change how new projects near homes are assessed.

Most of all, watch how quickly SYD3 moves towards its mid-2028 finish. If AirTrunk Eastern Creek delivers on schedule, the $4.25 billion green loan will become the template for how the next wave of Australian data centres gets funded.