Church said if that rule was applied here it could limit a typical Auckland family to a mortgage of less than $400,000.
The Reserve Bank is worried that continued growth in high debt to income lending would threaten the resilience of New Zealand's banks if there is a down-turn.
In its financial stability report released yesterday the central bank said despite a slow-down in Auckland property price growth in the last six months vulnerabilities in the housing market had increased.
"Despite some recent softening, house price growth in Auckland remains high at 9.3 per cent in the year to October, and Auckland's house price-to-income ratio, at 9.6, is among the highest in the world."
While loan to value restrictions had reduced the share of risky loans on bank balance sheets and improved bank resilience to house price falls it said that could be undermined if the growth in high debt to income lending continued.
"High-DTI [debt-to-income] loans are at a higher risk of default in the event of an economic downturn, so an increasing concentration of this lending is of concern."
But Church said it understood the Reserve Bank wanted to protect the economy against the risk of financial shock.
"But doing anything which reduces the construction of new dwellings is a hollow solution because it will only delay an even bigger problem down the track".
"The only sustainable way to fix the Auckland housing crisis is to build more homes as quickly as possible".