A question mark hangs over whether the country's three main centres could have new leadership, with Auckland's mayor undecided on whether he'll run again and Wellington's mayor not giving much away.
Christchurch mayor Lianne Dalziel has revealed she won't be standing for re-election next year, saying it's time for a new direction in her life.
She told Newstalk ZB's John MacDonald she felt a degree of relief in making a decision on whether to run.
"It's the line in the sand but also at the same time an incredible sense of gratitude that I've had to the city and a real privilege to be able to represent the city where I was born and lived all my life."