United Future leader Peter Dunne believes it is inevitable Wellington will go down the path of becoming a super-city.
Auckland is to become a super-city next year, with one mayor elected by voters and up to 30 community boards.
Mr Dunne says an organised, powerful and cohesive Auckland will present a major economic and political challenge to the capital.
The long-serving Wellington-based MP says the current local government arrangements in the region are cumbersome and disjointed.
Mr Dunne proposes a Wellington super-city extending as far north as Waikanae but excluding Wairarapa, with one elected council and mayor.
He says the region cannot afford to delay and should be developing a comprehensive plan ready to be implemented in time for local body elections next year.
