A report by a local government working party is proposing a single, super-city council for the Wellington region.
The working party which includes representatives from existing councils is suggesting two models for a single council and mayor.
Working party chairperson Ken Douglas, who is also a Porirua city councillor, says a single council would lead to stronger regional leadership and better infrastructure planning, and would save money.
But Lower Hutt mayor Ray Wallace and Wellington's mayor Celia Wade-Brown both say the working party's focus is too narrow.
They say merging the region's eight councils into three or four larger councils should also be considered.
Mr Douglas says the various existing councils will now vote on whether to seek public comment on the report.