The Government has moved to prevent land-banking in Auckland as part of a series of urgent changes being debated in Parliament this afternoon.
But Opposition parties say the move comes too late and will not guarantee the construction of more houses in the city.
The law change being considered by Parliament will extend Special Housing Areas in Auckland for another six months.
National's main policy for increasing housing supply, the Special Housing Areas allow fast-tracked consent for large housing developments, a proportion of which must be sold at affordable prices.
They were introduced three years ago in a bid to ramp up construction rates in the face of a housing shortage in the city.