Mrs Bennett said there had been resistance from communities who were concerned about the potential impact on their identity and way of life.
Government was proposing a "viable alternative to large-scale amalgamation".
Regions could transfer some core services between regional and territorial authorities. Or they could transfer them to "arms-length" organisations similar to Auckland's Council Controlled Organisations (CCOs).
Half of CCOs' directors are appointed by the council. Mrs Bennett admitted there could be some resistance to transferring core services to less democratic entities, but said changes would not be forced on regions, and would be community-led.
The Government planned to introduce law changes next year which would allow the new structures to be "locked in" for the long-term.
Mrs Bennett said Northland would be a prime candidate for a more integrated approach because it needed significant infrastructure upgrades but collected low rates and had a number of separate councils. She said the region "still has a number of councils which are barely catching up".
If Northland took a more integrated approach, it could receive central government funding to help with infrastructure, she said. NZME