The Greater Western Sydney Area is expected to experience significant economic growth over the coming years with the development of the Western Sydney International Airport and the surrounding metropolitan, commercial, and industrial precincts.
There will be several measures undertaken by Transgrid to ensure a safe and reliable electricity supply for the future of the area including the following.
To maintain supply within the region and support electricity distribution, via Endeavour Energy’s network, Transgrid is planning to construct a new 330kV substation – Kemps Creek 330kV substation – immediately south of our existing Kemps Creek 500kV Substation at West Hoxton.
The project is critical to ensuring a safe and reliable electricity supply for Western Sydney Priority Growth Area, including Western Sydney International Airport.
Regulatory Investment Test for Transmission - Completed
August 2025Public exhibition of Review of Environmental Factors - In progress
March 2026Construction starts - Proposed
April 2027Construction ends - Proposed
December 2028Commissioning - Proposed
2028We are currently preparing an environmental assessment, in the form of a Review of Environmental Factors (REF), in accordance with Part 5 of the Environmental Planning & Assessment Act 1979.
Transgrid will be the determining authority for the project.
Transgrid is committed to engaging the community and key stakeholders to improve project outcomes for the surrounding community and electricity users. Consultation with surrounding landowners and key stakeholders has commenced.
The REF will be available for public comment on our website in the first quarter of 2026. We will notify key stakeholders and the community prior to the exhibition of the REF to invite submissions.
Community and stakeholder feedback will be considered during the project and, where reasonable and feasible, amendments may occur to the project design and construction.
Transgrid has worked with Endeavour Energy to undertake a Regulatory Investment Test for Transmission (RIT-T) to determine the most prudent and efficient option for ensuring supply to Western Sydney Priority Growth Area, including Western Sydney International Airport.
The RIT-T is a cost-benefit analysis which Transgrid and other transmission network service providers must undertake to test the economic viability of different options available to meet some future transmission demand. It is designed to provide options that will deliver the highest net economic benefits to all those who produce, consume and transport electricity in the market, whilst meeting supply reliability standards.
The RIT-T consultation process involves the publication of three reports, which are available below:
28 October 2025
Transgrid and Endeavour Energy will deliver a major new electricity infrastructure project to power the priority growth areas and precincts of the Western Sydney Aerotropolis, ensuring reliable energy supply for decades to come.