A group representing New Zealand's property valuers says introducing debt to income limits for mortgage lending would damage the Auckland housing market and New Zealand's economy.
The Reserve Bank of New Zealand wants the government to allow it to use a debt to income limit because it is concerned about the rising amount of lending being done by banks at five and six times a buyer's income.
The government has yet to agree to adding such a tool to the bank's toolkit and is still discussing the proposal.
But Ashley Church, chief executive of the Property Institute of New Zealand, believes introducing limits would have 'serious and unintended consequences' for the Auckland property market and would 'almost certainly make the Auckland housing crisis even worse'.
"These things often sound like good ideas until you start thinking through what would happen if they were actually implemented"
Church said the consequences of such a policy would be disastrous.
"The number of new homes being built - the very thing that Auckland needs most - would plunge as the number of people earning enough to buy them would dwindle to a trickle. So the policy could very well kill off the one thing that can fix the Auckland housing crisis - the construction of new homes".
A similar policy was introduced to the United Kingdom in July 2014 limiting buyers to a mortgage which does not exceed 4.5 times their annual earnings.