The Government has ordered another business case for a second Auckland harbour crossing, three months after the Transport Agency finished its own investment case and endorsed a tunnel as the option to build.
Prime Minister Christopher Luxon and Transport Minister Chris Bishop announced the decision at the weekly post-Cabinet briefing on Monday. The new work will be led by an independent senior responsible owner recruited from anywhere in the world, will be half funded by Auckland Council, and is expected to be finished some time in 2027.
That officer will answer to the Ministers of Finance, Transport and Auckland, and to Cabinet, rather than to the Transport Agency. According to the New Zealand Herald, the role will be supported by representatives from Treasury, NZTA, National Infrastructure Funding and Financing, the Ministry of Cities, Environment, Regions and Transport, and the chair of the Auckland Regional Transport Committee board.
The Transport Agency completed an investment case in May, after value engineering work and a barge carrying out seabed testing in the harbour, and its board endorsed a tunnel. Bishop said that was not enough to let Cabinet make a call.
“Despite the great progress that has been made, more information and work is required before Cabinet can select a preferred option,” he said in a statement quoted by the Herald.
He said the extra work would cover funding, financing and delivery model options, and would let ministers look at the wider Auckland network at the same time, including NZTA’s Auckland Motorway Plan, any time of use charging scheme, and the 30 year Auckland Integrated Transport Plan being developed under the region’s transport governance reforms.
Bishop framed the delay as a deliberate break with how big projects have been announced in the past.
“Previous governments have gone out and announced what they are going to build before they have done the work required around how much it will cost, how they are going to pay for it, and whether the project is deliverable. This Government does not intend to make the same mistake,” he said, according to RNZ.
He said megaprojects of this size in other countries had all taught the same lesson, that “they cost more and take longer than the first estimates suggest”, and that the cause was usually scale, duration and the number of approvals and decision makers rather than the engineering itself. “That’s a governance problem, and it has a governance solution,” he said.
On the size of the job, Bishop was blunt. “The WHC (Waitematā Harbour Crossing) project will likely be the largest and most expensive infrastructure project ever undertaken in New Zealand. It is imperative that we get it right because New Zealand’s fiscal position, economic performance, and reputation as a modern, functional, first-world country depends on it.”
The scale is not in dispute. A Treasury investment report reported by RNZ in November 2024 put the capital cost of the then recommended first stage at between $22.9 billion and $27.2 billion, and noted that at least $36 million had already gone into the preliminary business case, three quarters of it on consultants. That was under the previous transport minister, Simeon Brown, who directed the agency to refine the scope before ministers picked an option.
Cabinet also agreed on Monday to fund half the cost of yet another study, this one into the Meola Reef route that Auckland mayor Wayne Brown has pushed since 2024. Brown wants a bridge running from Point Chevalier to the North Shore across the partly submerged lava flow that extends about 2km into the harbour, rather than a tunnel or a second crossing beside the existing bridge.
Bishop made clear officials do not rate it. “The Meola Reef option has been looked at many times in the past before and discounted as unachievable, but in the spirit of good faith, and recognising the Government’s responsibilities under the Auckland City Deal, Cabinet has agreed to commission a further study into the option, if the council is interested,” he said. The council would be invited to help scope and procure the study and to pay half its cost.
Brown has not softened his position. Told in February that a formal route decision was near, he told the Herald, “No, I’ve let them in on what I’m planning. It won’t be where they’re putting it. It’s going to be on Meola Reef.” He described the route as one where the reef does half the work. “It goes halfway across the harbour, you put dirt on top of that and you’ve got a short bridge that goes to Little Shoal Bay.”
A third option is also now in play. Bishop said the Government had received a market led proposal from what he called a reputable international consortium for an innovative construction methodology to upgrade the existing bridge, and that officials had recommended it be advanced and folded into the detailed business case.
The existing bridge opened in 1959 and carries about 170,000 vehicles and 35,000 bus passengers a day, and Bishop said weight restrictions and the absence of bus lanes were holding back what is the busiest corridor on the state highway network.
Private money looks harder than it did. An NZTA market sounding report completed in 2025 and released to The Spinoff under the Official Information Act found contractors and financiers preferred the tunnel, and warned that a bridge built as a public private partnership would be “unlikely to achieve value for money” because the same operator would end up carrying the risk of the 1959 structure. The report also suggested $7.5 billion was likely the upper limit of any fixed price offer, well short of the expected cost either way.
With Parliament back this week and the election campaign under way, a crossing that has been studied for decades now has another year of study ahead of it before a single option is chosen. If you want to see where the parties stand on transport spending and much else, our voting tool lets you compare their positions side by side.
Do you think another business case is caution or delay, and would you rather see a tunnel, a Meola Reef bridge or money spent on the bridge we already have? Tell us in the comments below.
This article was written by AI, briefed to report the facts, hopefully without some of the bias people bring to the job 🙂
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