Sydney’s data centre industry faces significant delays and uncertainty as a severe power capacity shortfall threatens major projects critical to the city’s technology infrastructure expansion. Developers have been informed that Sydney’s electricity supply is fully committed, with limited grid capacity expected to only improve after upgrades planned for the early 2030s. This shortage has stalled key developments and raised concerns about the viability of a pipeline of projects valued at more than A$50 billion.
In August, Transgrid, the main transmission network operator, notified data centre developers that existing capacity in western Sydney, the metropolitan hub for these facilities, was exhausted. The surge in connection requests, totaling 1.5 gigawatts of new demand recently locked in by Transgrid, has effectively doubled the electricity load in the region, forcing developers to bear the cost of costly network expansions. Transgrid is exploring options to increase capacity by up to 2 gigawatts in western Sydney and is also considering leveraging underutilized power supplies in less populated areas such as the Riverina and Hunter regions.
Compounding the supply constraints, data centres must comply with federal government requirements to source new renewable energy to power their operations. This policy, intended to ease pressure on Australia’s fragile electricity grid, extends project timelines significantly. Industry representatives note that while data centres typically take 18 months to two years to build, associated renewable energy projects may require four to seven years, creating a timing mismatch that threatens investment and customer commitments.
Key projects impacted by the power bottleneck include Goodman Group’s proposed $5 billion development at Eastern Creek, NextDC’s planned S7 complex, Stack Infrastructure’s SYD1, and AirTrunk’s S4 facility. Delays in securing power connections could push these developments into the next decade, potentially undermining Sydney’s role as a leading data centre market amid rising competition from other regions. While well-funded major players are expected to proceed, smaller or speculative projects may be deferred or abandoned altogether.
The pressure on western Sydney’s grid has prompted some developers to explore regional alternatives, with AirTrunk and CDC among those targeting sites in regional New South Wales. Nonetheless, commitments to western Sydney remain strong given its established advantages.
Industry experts highlight that new capacity is unlikely until the Sydney Ring South electricity transmission project is completed in two phases between 2030–31 and 2033–34. In the interim, governance reforms are being proposed by the New South Wales government to ensure data centres do not impose excessive costs on households or small businesses and contribute fairly to the development of additional energy infrastructure.
Government data indicate that as of July, data centres sought network connections totaling approximately 28 gigawatts of capacity statewide, with about 13 gigawatts nearing advanced connection negotiations—exceeding the average daily electricity demand in NSW. However, industry bodies caution these figures include speculative demand and emphasize more conservative forecasts, projecting about 3.9 gigawatts of new capacity by 2030.
NSW is home to more than 60 operating or under-construction data centres and a development pipeline encompassing 20 projects valued at over A$51 billion. The sector’s future growth now hinges on resolving the critical power supply gap as demand for data services and artificial intelligence technologies continues to soar.