The figures ranged from $522 to Rob Webber and Associates to $2,686,705 to Russell McVeagh.
The approaches are outlined in information collected by councillor Cameron Brewer into legal costs by the council and seven council-controlled organisations (CCOs).
The figures show that legal costs for Watercare and Auckland Transport increased by 34 per cent and 127 per cent respectively between 2011 and 2012, which both CCOs put down to costs for big construction projects.
Council acting chief executive and chief finance officer Andrew McKenzie said that overall the Auckland Council group had cut its legal costs by about $3.6 million, or just over 9 per cent.
Mr Brewer said Watercare's 34 per cent rise in outside legal costs did not make good reading, but at least they did not hide behind the Local Government Official Information and Meetings Act. "Watercare didn't see the need to protect themselves or the legal firms they use, so I can't see why the rest of the council can't show the same transparency."
Ms Brandon used the act to limit the amount of information released about the council's legal costs, telling Mr Brewer she was confident the council was providing a very cost-effective service to the council and ratepayers.
The Auckland Council has not always been forthcoming about its spending with consultants.
The Ombudsman is investigating a complaint brought by the Herald over a refusal last year by council chief executive Doug McKay to say how much the council paid to consultants - planner Brooke Dales and architect Garry Glasgow - for work on controversial heritage cases at 18 Paget St, Freemans Bay and 38 Hackett St, St Marys Bay.
Figures leaked to the Herald show a council planning unit paid Mr Dales' consultancy firm DCS $95,488 between July 2011 and January 2012.