She said it was simply too unsafe to get those vehicles out.
The carpark was significantly damaged in the 14 November earthquake, to the point it is not safe for anyone to enter.
Moana Mackey said now the crane is up, the focus is to get the carpark down safely and quickly.
She said there will be noise during the demolition and some days will be noisier than others depending on the work.
She said Tory Street is now a demolition site between Courtenay Place and Wakefield Street, and pedestrians need to respect the cordons.
The phasing of the lights at the intersection of Tory Street and Courtenay Place has been changed overnight between 9pm and 4am to make it quicker for pedestrians to cross the road and avoid the cordon.