Reserve Bank Governor Graeme Wheeler said banks will be subject to restrictions on high loan-to-value ratio (LVR) housing mortgage loans from October 1.
He said banks would be required to restrict new residential mortgage lending at LVRs of over 80 per cent to no more than 10 percent of the dollar value of their new housing lending flows.
He said the LVR restrictions were designed to help slow the rate of housing-related credit growth and house price inflation, thereby reducing the risk of a substantial downward correction in house prices that would damage the financial sector and the broader economy.
In a speech today at Otago University, Wheeler said housing played a critical role in the economy but was also a major source of "value and risk" to the household sector and the banking system.
"The Reserve Bank is concerned about the rate at which house prices are increasing and the potential risks this poses to the financial system and the broader economy," he said.