The Ministry of Cities, Environment, Regions and Transport (MCERT) is a proposed public service department of New Zealand.
The Ministry was announced in December 2025 as a new agency that replaces the Ministry for the Environment, the Ministry of Housing and Urban Development, and the Ministry of Transport, and takes the local government functions from the Department of Internal Affairs. A paper taken to Cabinet by public service minister Judith Collins and RMA reform minister Chris Bishop that month noted that the new agency will reduce fragmentation, "provide joined-up advice to solve problems, with a regional focus" and "strengthen performance monitoring across interdependent systems."
The Ministry is expected to have a chief executive appointed by April 2026 and be fully operational on 1 July 2026.
The Ministry will be formed by an amalgamation of these current ministerial portfolios.