He said the events leading up to the dissolution of the elected council in 2012 had shown "local authorities aren't infallible".
"Sometimes they lose the grip of what they've meant to do," he said, adding he thought the commissioners had done a "marvellous" job during their tenure.
Mr Robertson said recruiting a new chief executive for the council, which was under way, was among the top priorities before the election.
Current KDC debt sat at $75 million and was decreasing by about $1 million a year. Rates rises were in keeping with inflation and were expected to remain lower-than-average compared with other councils over the next 10 years, he said.
"Financially the council is in good shape ... We have high debt but not too out of line with a lot of councils in New Zealand," Mr Robertson said.
Next came wrapping up KDC's numerous legal wrangles, including court action against the Auditor-General and an Employment Relations Authority process involving former chief executive Jack McKerchar. KDC was back in the High Court in May battling about 10 members of the Mangawhai Residents and Ratepayers Association who have been refusing to pay their rates.