Ms Brandon said the political working party debated and discussed officer reports informally before making recommendations to the Auckland Plan committee where issues were discussed in public. Records show the committee normally rubber-stamps the work of the political working party, which meets behind closed doors.
The political working party includes 10 councillors, nine Local Board chairs and two members of the Maori Statutory Board. It is chaired by deputy mayor Penny Hulse.
Mr Brown, who promised greater transparency and openness when he came to office, said everything that needed to released on the draft Unitary Plan had been released and had no intention of releasing other documents.
Sally Hughes, spokeswoman for the Character Coalition - a group of heritage and community organisations - said it was vital for the public to have access to all the information to form a view of the robustness of the Unitary Plan.
She said the council had not been forthcoming providing the research, evidence and analysis for the level of intensification in the Unitary Plan, infrastructure planning and the lack of public notification on heritage.
The Herald is seeking a review of the council decision from the Ombudsman.