In June 2015 when councillors voted to go ahead with the project, chief executive Geoff Williams took them on a "virtual tour" of the Civic Centre as he described some of the worst instances of damage and lapsed maintenance.
These included a locked ground-floor cupboard that contained dangerous levels of sulphur monoxide - just feet away from a council employee's desk.
Mr Williams also gave the less hazardous examples of ageing chairs in the cafeteria and worn carpets as proof of the need for major refurbishment.
Some councillors were initially reluctant to commit to an annual spend of $650,000 for six years on upgrades.
But most dissenting voices were silenced by a slideshow of images providing visual proof of some of the more worrying maintenance issues.
In the end it was an almost unanimous vote to approve the spending, with only Rob Kent voting against.