Wellington has a new acronym to learn, as the government's newest ministry begins work today, bringing together responsibilities that affect where New Zealanders live, how they travel and how communities grow.
The creation of the Ministry of Cities, Environment, Regions and Transport (MCERT) is one of the biggest public service shake-ups in recent years.
The mega-ministry has been created by merging the Ministry for the Environment, the Ministry of Housing and Urban Development, the Ministry of Transport, and the local government functions of the Department of Internal Affairs.
The Government says the new ministry presents an opportunity to solve some of the country's biggest problems under one roof, while critics say the new entity deprioritises the environment.
So what exactly is MCERT, and what will it do?
From July 1, MCERT will be responsible for 41 Acts of Parliament with an annual operating budget of $388 million and approximately 1300 employees.
Speaking at the Environment Select Committee during June's Scrutiny Week, senior National minister Chris Bishop said it was his intention that MCERT would be a beacon for "the brightest minds in the public service" to solve "some of the biggest problems afflicting New Zealand".
"The work they're doing across urban planning and environmental management and adaptation and transport pricing, that's the stuff that's really going to unlock growth and productivity," he said.
"We've got a real opportunity, and I beg you to take it seriously and not just think about it as bureaucratic deck chair reshuffling."
However, the Opposition has been blunt. Labour's environment spokesperson Rachel Brooking called the creation of MCERT "deplorable", while the Green Party's Lan Pham went further, saying the Government was dismantling "the ministry responsible for environmental protection" at precisely the moment it was needed most.
What problem is MCERT trying to solve?
Before today, if a council wanted to build homes near a train station, it had to navigate four separate central government agencies — housing, transport, environment and Internal Affairs.
Bishop, whose own portfolios span housing, transport, infrastructure and RMA reform, had long argued that this fragmentation was costing New Zealand.
He cited Auckland's City Rail Link as his clearest example, with billions spent on transformational infrastructure, but the opportunities for transit-oriented development "which have either not been taken up or are only now being belatedly explored".
"My firm view is that the disconnected nature of central government policy advice has contributed to those missed opportunities," he said in December last year.
What is being merged?
Three ministries ceased to exist from today — Environment, Housing and Urban Development, and Transport — with their staff and functions transferring to MCERT. The fourth component, the local government functions of the Department of Internal Affairs, is a partial transfer, as the rest of DIA remains unaffected.
Three of these transfers could be completed by a simple executive regulation, but the Ministry for the Environment was established by an Act of Parliament and so required Parliament to undo it.
The Government introduced a bill to disestablish MfE in February. It went to select committee, which received 588 public submissions. All but five opposed the change.
Parliamentary Commissioner for the Environment Simon Upton — an independent officer of Parliament — submitted that MfE should simply be "left out of this merger".
As a partial concession, the committee added a requirement that MCERT's new chief executive, Jeremy Lightfoot, report annually on his environmental functions.
Lightfoot, formerly chief executive of the Department of Corrections, was named MCERT's inaugural chief executive on April 1. His five-year appointment was promoted by Public Service Commissioner Sir Brian Roche on the grounds of his management and delivery track record.
The bill passed on May 27, with National, ACT and New Zealand First in favour and Labour, Te Pāti Māori and the Greens against.
What does the Opposition say?
Labour and the Greens argue that burying a dedicated environment ministry inside a growth-focused super-ministry will structurally disadvantage environmental protection.
They point to official advice from May 2025 which warned that "given the proposed agency would be development oriented, there is a particular risk of environmental functions and perspectives being lost".
Lan Pham said the bill sent "a clear message that the environment is not a priority for this government".
Labour leader Chris Hipkins has stopped short of promising to reverse MCERT if it forms the next government but has warned it risks becoming "a very big, very complex government department that isn't necessarily delivering the outcomes we need".
What now?
MCERT takes over as the lead agency for replacing the Resource Management Act, with the Planning Bill and Natural Environment Bill still before Parliament.
It will also review council amalgamation proposals — after the Government gave district and city councils a three-month window in May to propose mergers with their neighbours.
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