The cost of a review into Auckland Mayor Len Brown's affair with council adviser Bevan Chuang has reportedly risen to $250,000.
But despite widespread reporting of the figure, Mr Brown, deputy mayor Penny Hulse and council chief executive Stephen Town will not confirm it.
Former council chief executive Doug McKay said before Christmas that the EY (Ernst & Young) report and associated costs would exceed $100,000.
As well as employing EY to conduct the review, which was meant to take no longer than four weeks and stretched to seven weeks, the council has had to pay for legal advice from Crown Solicitor Simon Moore, QC.