GreenSquare opens SYD1 data centre

GreenSquare has opened the first stage of its SYD1 data centre campus in Norwest Business Park, Western Sydney, after transforming a facility originally built in 1995 into a high-density AI compute site.

Delivered in eight months, the project involved the adaptive reuse of the existing building rather than demolition and rebuild. Data halls were relocated to the ground floor, allowing the facility to accommodate high-density compute without additional structural reinforcement.

GreenSquare said this increased IT capacity within the original building footprint by 275%.

SYD1's first customer is NASDAQ-listed NVIDIA Cloud Partner Sharon AI, which will deploy approximately 8,200 NVIDIA Blackwell Ultra GPUs at the facility - one of the larger deployments of NVIDIA HGX B300 infrastructure in Australia, according to the company.

The facility uses liquid-to-chip cooling and a closed-loop system that operates without evaporative cooling for approximately 96% of the year. GreenSquare said SYD1 has a projected power usage effectiveness (PUE) of 1.20 and a potable water usage effectiveness (WUE) of less than 0.1 litres per kilowatt-hour, both below the NSW Government guideline benchmarks of 1.25 and 1.0 respectively.

Rainwater harvesting is expected to offset approximately 10% of annual cooling water requirements.

An independent assessment by engineering consultants TTW found the adaptive reuse retained 92% of the building's existing structural carbon. GreenSquare said the approach, combined with low-carbon concrete, resulted in 76% lower structural upfront carbon per square metre and 93% lower carbon per kilowatt of IT capacity compared with a new-build facility.

"We saw an opportunity to give a 30-year-old data centre a completely new purpose," said Joshua Martens, chief technology officer at GreenSquare.

"By rethinking the building's configuration, introducing prefabricated systems design, and using the latest technology to reduce carbon, we've created a facility that can support some of today's most demanding compute requirements while using resources far more efficiently."

Main construction works began in February 2026, with around 400 people working on site at peak. The project recorded more than 350,000 hours worked without a lost-time injury. GreenSquare worked with Erilyan on construction and delivery, and with Fredon on electrical infrastructure and commissioning.

SYD1 Stage 1 is the first part of a planned campus. The NSW Government's Investment Delivery Authority has endorsed support for a proposed 80 MW second stage.