Work to upgrade Middlemore Hospital's baby unit was under way for a month with no building consent.
Construction had to be urgently halted - and has remained that way - as the hospital battles to find beds for sick babies and children amid a surge of winter viruses.
Auckland Council forced the stop in May when it realised there was no consent in place.
The $5 million project for a desperately needed expansion of the South Auckland hospital's neonatal unit started in April.