Auckland Council wants state help to pay the bill for hearing thousands of public views on its first Unitary Plan.
It says the Government's measures to fast-track the regional growth rule book will bump up the hearings' cost to about $5.5 million.
Last month, Environment Minister Amy Adams announced a one-off process for the plan where council hearings would be replaced with a hearings panel independent from the council. The panel, to be chaired by a retired judge, would be picked by Ministers for the Environment and Conservation.
It would have the power to direct mediation and lawyers could cross-examine the public and experts on their submissions. Appeals would be restricted.
The council's budget for the hearings process was $3.75 million over two years, said a report by chief planning officer Dr Roger Blakeley and council chief executive Doug McKay.