Three new towns and cities are being eyed up by the Government as possible locations for another round of state house sell-offs.
A briefing paper to Social Housing Minister Amy Adams mentions the sale of Housing New Zealand properties in four locations, three of which have been blanked out.
Ms Adams says a sell-off is on the cards, but nothing has been confirmed.
"What we've said is we're interested in looking across the country at where transactions into private sector ownership make sense," she told Newshub.
"There is a range of potential options that Treasury are thinking about and putting advice up to ministers."
Green Party social housing spokeswoman Marama Davidson says the Government needs to be upfront if it is planning a sell-off.
"The people do have a right to know if their home is going to be sold out from underneath them. These are real people's lives we're talking about."
Ms Davidson says there's a reason the Government is being cautious.
"They've botched up state housing sell-off in the past so now they've been forced to go undercover a bit and see whether it's going to work out."
She says the fact Treasury is updating the minister is a sign something is going on.
"They need to come clean and tell people where the next state house sell-off will happen."