Iberdrola enters Australian transmission on VNI West, with a build-own-operate role still to be earned

Iberdrola Australia was appointed Development Partner for the Victorian section of VNI West in November 2025, marking the Spanish-owned Iberdrola Group's entry into Australian transmission networks.

The appointment is not a construction contract. During the development phase Iberdrola will work with VicGrid on design, procurement, project management and the Environment Effects Statement (EES) process, including preparing a plan and budget for the delivery and operational phases. If Iberdrola meets VicGrid's expectations through the development phase, it will then be appointed to build, own and operate the line, with oversight from VicGrid.

That structure is the most interesting thing about this project, and it is worth understanding before assuming who the eventual head contractor will be.

The essentials

On the Victorian side, the EES went on public exhibition on 5 October 2026, with submissions open until 16 November. An Inquiry and Advisory Committee will hold a directions hearing on 7 December, with the public hearing to begin in the week of 8 February 2027; the Planning Minister's assessment follows the committee's report. In NSW, Transgrid's Environmental Impact Statement is with the Department of Planning, Housing and Infrastructure, with an approval decision anticipated in late 2026.

VNI West is also an issue in the 28 November Victorian state election. On 19 August the Liberal–National Coalition said it would cancel the project if elected, and One Nation has taken the same position; Energy and Resources Minister Jaclyn Symes described the Coalition's pledge as reckless.

The cost estimate

In July 2025, AEMO's final 2025 Electricity Network Options Report put the total project cost at $7.6 billion, up from $3.6 billion in its May 2025 draft, with an accuracy range of minus 30 to plus 50 per cent (up to $11.4 billion). Transgrid updated the NSW section to $3.7 billion the same month; an updated figure for the Victorian section has not been published.

That gap matters. Preparing a plan and budget for the delivery and operational phases is part of Iberdrola's development-phase scope, so the Victorian number is expected to come out of that work. In the meantime, anyone pricing work against a $3.6 billion assumption is working from a figure superseded more than a year ago.

The schedule was updated in the same period. In late June 2025 Transmission Company Victoria, then responsible for the project, advised landholders that expected completion was shifting from 2028 to November 2030, to allow more time for detailed environmental, geotechnical and cultural assessments and for landholder engagement on access and easements. The project now expects construction to begin in 2027 if approvals are obtained.

Accountability now sits with VicGrid

The governance history is unusually busy for a project not yet in construction:

• Originally developed by the Australian Energy Market Operator and Transmission Company Victoria (TCV)
• 17 February 2025 — the Essential Services Commission granted TCV an electricity transmission licence
• 1 November 2025 — accountability for TCV and VNI West transferred to VicGrid, under legislative reform that made VicGrid a state business corporation responsible for planning Victoria's shared transmission network

For contractors, the practical point is that the counterparty and the procurement approach have both changed, and the Development Partner appointment was announced ten days after the transfer.

Why the development partner model matters

Transmission is not being procured the way roads and rail are.

A development partner arrangement with a contingent build-own-operate appointment puts the private party into design, approvals and cost estimation before the construction contract exists — and makes the construction role conditional on performance during that phase.

For the supply chain, three consequences:

The delivery appointment follows the development phase. Iberdrola is positioned for, but not yet appointed to, the build-own-operate role. Subcontractors should not assume the delivery structure is settled.

The EES process is on the critical path. Environment Effects Statement completion is explicitly part of the development phase scope. VNI West has faced sustained opposition from landholders along its Victorian route, and the June 2025 schedule change was made to allow more time for assessments and landholder engagement.

Early works are separately financed. The CEFC committed A$120 million to AEMO in September 2024 for Victorian-section early works (community, landholder and Traditional Owner consultation and corridor investigations), so development work proceeds ahead of the approval decision.

What to watch

1. The 28 November Victorian state election, and what the result means for the Victorian section.
2. The EES inquiry: submissions close 16 November, and the public hearing begins in February 2027, ahead of the Planning Minister's assessment.
3. Publication of an updated Victorian-section cost, expected to come out of the development-phase plan and budget.
4. Whether Iberdrola converts the Development Partner role into build-own-operate.
5. The NSW section, running in parallel at $3.7 billion under Transgrid, with its planning approval decision anticipated in late 2026.

Published 28 October 2026 · Updated 27 October 2026