A $3.5 billion Southland project was consented without the public being notified. Now a fight over pausing new approvals, water takes, power prices and who actually decides is playing out in parliament and the planning system.
The Green Party wants a one-year freeze on new AI data centre consents. The Prime Minister calls that alarmist. Between those two positions sits a fast-moving industry, a planning system straining to keep pace, a power grid that has not been asked to carry anything like this before, and a Southland community that says the biggest such project in the country was waved through before anyone asked it.
The flashpoint is Datagrid’s NZ$3.5 billion AI Factory at Makarewa, near Invercargill. At full build it would draw close to 6% of the nation’s electricity, making it one of the largest single power users in New Zealand.
In March 2026 it received full resource consent from Southland District Council, Environment Southland and Invercargill City Council. It was granted without public notification, believed to be the first hyperscale AI data centre approved through a non-notified process. That single procedural fact has done more to shape the politics than any figure in the business case.
Under the Resource Management Act, councils can process a consent without public notification where the statutory tests for notification are not met, including where adverse effects are judged to be no more than minor and affected parties have given their written approval. It is commonly used where councils conclude statutory notification thresholds are not met.
Using it for a hyperscale campus that will reshape a district’s power and water demand is another matter, and it is the heart of the opponents’ case. Their argument is not only that the project is wrong. It is that a project of national scale should never have been decided in a process that gave the wider public no formal standing to object.
The distinction matters legally. A non-notified consent sharply narrows who can appeal and on what grounds.
Once the decision is made, the ordinary route of public submission and Environment Court challenge is largely closed off. For neighbours who learned the scale of the thing only after it was approved, that has felt less like efficiency and more like a door shut before they reached it.
Sitting above the council process is the Fast-track Approvals Act 2024, the regime the government passed to move major infrastructure past what it regards as planning delay. The Act was contentious long before any data centre attached itself to it.
Documents released to RNZ showed the Office of the Clerk had warned Infrastructure Minister Chris Bishop as early as July 2024 that writing named private projects into the bill risked making it inadmissible under parliament’s own rules. The government also retreated from its original design, which would have handed three ministers the final sign-off on which projects proceeded. After sustained criticism it left the decision with panels of experts instead, a change environmental groups dismissed as shallow re-packaging rather than a genuine limit on ministerial reach.
The through-line of the Act is a brief that leans towards building. Panels work to tight timeframes, and the balance the ordinary consenting system strikes between development and environmental protection is deliberately tilted.
Applied to a wave of energy-hungry data centres, that design is exactly what its critics feared and exactly what its backers intended. The law is doing what it was written to do. The dispute is over whether that is the right thing to be doing at this scale.
The sharpest political tension is not water or noise. It is electricity, and who is standing in the queue for it.
Datagrid alone would become one of the country’s largest single loads, and it is not alone. B2B News counted five South Island data centre projects already testing the grid, and Electricity Authority planning documents identify around a dozen likely facilities, although the final capacity of most has yet to be disclosed.
In its formal planning it has so far accounted for only Datagrid’s 280MW. MBIE’s own scenario work has flagged large-scale data centre demand as a major uncertainty, with the upper end reaching 4.6 TWh a year by 2030, a load comparable to the entire Tiwai Point aluminium smelter.
That collides with a household squeeze already under way. Lines charges are rising, and Consumer NZ has calculated that average power bills will climb by around $5 a month every year until 2029.
Because the wholesale market prices all electricity at the cost of the most expensive generator running at the time, usually a fossil plant, consumers pay fossil-pegged prices even though the great majority of supply is renewable. Into that market the country is now proposing to add some of the biggest new customers it has ever connected.
Transpower is still in the investigative phase on the Datagrid connection. The Greens’ core claim, that consenting is running ahead of the rules and the generation needed to support it, lands hardest here. Every additional megawatt of data-centre demand must either be matched by new supply or accommodated within an already constrained system.
The government’s answer is that the demand is precisely what will pull new renewable generation into existence, and that turning it away sends the investment to competitor countries. Both things can be true.
New generation does tend to follow firm demand. It also tends to follow it, arriving after the load rather than before it, which is the window in which prices and security of supply come under strain.
There is an overseas investment layer as well. Large data centres backed by offshore capital can trigger the Overseas Investment Act, particularly where sensitive land is involved or control thresholds are crossed.
From 6 March 2026 the government introduced reforms intended to streamline overseas investment approvals, including a stronger focus on national interest considerations and faster decisions for lower-risk investments. The direction of travel across all three regimes, planning, fast-track and overseas investment, points the same way. Government wants the capital to arrive, and it wants it to arrive quickly.
The economic argument is being made at the top. Invest New Zealand is chasing $25 to $35 billion of private money for data centres, renewable generation, fibre and transmission over five years, and senior industry figures have compared the moment to the wool boom of the last century, a once-in-a-generation chance to attach a small economy to a very large global flow of money. Southland, a region that has spent years bracing for the day the Tiwai smelter closes, has an obvious interest in a replacement anchor load.
Public scepticism remains high. On 22 July hundreds packed the Invercargill Workingmen’s Club at a meeting called by the Southland Sustainable Resource Coalition, raising water, noise and the sense that a project of national scale had been decided over their heads.
National polling suggests the mood is not confined to one district. An Ipsos survey this year found only 35% of New Zealanders believe AI’s benefits to society outweigh its environmental costs, well short of the global figure.
The open questions are as much legal as political. Should projects of this scale ever be non-notified.
Does the fast-track regime leave enough room for the people next door to be heard before a panel signs off. Is a water take a company promises never to use still a risk the rules should govern. And can a grid already pushing household bills higher absorb a dozen Tiwai-sized customers without someone paying for it.
With more applications expected, the Datagrid approval has become both the template later developers will follow and the precedent its opponents most want revisited. Whether that revisiting happens, and whether the rules are rewritten before the concrete is poured rather than after, depends less on the planning courts than on which argument prevails in parliament.