Auckland Council debt, which was $4 billion three years ago, has now reached $6.5b, but Mayor Len Brown says there is a good balance between the super city's debts and assets.
He told TVNZ's Q+A programme today that in the past three and a half years there had been a significant build in infrastructure.
"One of the primary reasons why Auckland was united was because we've had decades of under-investment in our infrastructure and particularly transportation, and so we've basically had to kick start.''
The city had $40b worth of assets to offset the $6.5b of debt, he said.
"So we're not just racking up debt.