Housing Minister Phil Twyford yesterday unveiled the plan to build up to 4000 houses on roughly 30 hectares in Mt Albert.
The Opposition says that will need a lot of spending to bring local sewers and stormwater systems up to scratch.
Mr Goff is confident the infrastructure can be put in place, but said the government will have to chip in.
Mr Goff said the homes are badly needed to address the city's housing crisis.
Opposition MPs questioning the density of the government's new housing project in central Auckland say it will be a tight squeeze for home owners.
ACT party leader David Seymour said that means, for example, cramming more than 100 dwellings into an area the size of a rugby field.
National's housing spokesperson, Judith Collins, said the homes will have to be incredibly tiny to fit.
Forty percent of the houses will be part of KiwiBuild - available to first-home buyers at between $500,000 and $600,000.