Auckland's housing shortage has worsened, to 45,000 homes.
Data from the Ministry of Business, Innovation and Employment shows the shortage has steadily deepened over the past nine years, worsening by 8000 in the past year.
The figures are contained in briefings to the incoming government.
Auckland Council data shows the city in the past year has built only around half the number of homes estimated to be needed annually.
Meanwhile, Housing New Zealand is poised to launch the development of more than 9000 homes in the Auckland suburb of Mt Roskill.
In briefing papers to Housing Minister Phil Twyford, the council said the 20-year programme will replace all 2500 existing state homes and add 400 more.
The balance of 6600 will be split evenly between market homes, and affordable homes for sale.
The Mt Roskill Development is within the wider Auckland Housing Programme intended to build 24 thousand new homes in a decade, adding a net seventeen thousand.