ANZ has revealed the suburbs where it is restricting lending on units.

A MAJOR bank has black-listed more than 30 Brisbane suburbs making it even tougher for buyers to purchase apartments there.

ANZ has warned mortgage brokers it now had tougher lending criteria in the suburbs which heavily featured inner Brisbane areas.

The suburbs on the list all have large unit markets and buyers in those areas would require bigger deposits of 20 per cent to obtain finance.

Suburbs in postcodes 4000, 4006, 4010, 4011, 4014, 4102, 4017 were on the list.

An ANZ spokesman said the list was part of its ongoing efforts to ensure they were lending responsibly.

“We regularly look at a number of factors in relation to residential apartments to make sure we are meeting our responsibilities including, supply and demand, rental yield, vacancy rates and location,’’ he said.

The memo ANZ sent to mortgage brokers this week said the new regulations would take affect from October 2.

This meant anyone borrowing to buy an apartment in the nominated postcodes would need a deposit of 20 per cent.

“Residential units including apartments, units and flats are impacted by this change,’’ it said.

“This policy change applies to all apartments in affected postcodes including off the plan and non-standard small residential properties less than $3m.’’

Other property types such as houses in those suburbs are not affected by the change and application which are lodged before the start date would be assessed under the previous lending criteria.

ANZ is not the first major lender to crack down on the Brisbane apartment market.

Late last year NAB sent out a list of suburbs to mortgage brokers of the suburbs where it would require a more substantial 20 per cent deposit to get a home loan.

At the time the bank said it took into account a range of economic factors when determining their risk lending in those areas. That list also featured inner Brisbane suburbs prominently.

In March last year AMP also “black-listed’’ a series of inner Brisbane suburbs such as Spring Hill and Petrie Terrace where there was a lot of apartment construction underway.

Mortgage Choice spokeswoman Jessica Darnborough said it was not unusual for banks to alert brokers that they were restricting lending to certain areas or for certain types of products.

She said it was about spreading their risk and not necessarily a reflection of what was happening in the market.

Ms Darnborough said it could be that they were already lending a lot in the area, which could happen where there multiple apartment projects.

“It is something that we have seen some major lenders do in the past,’’ she said.

“Obviously lenders are very diligent at looking at their risk profile.’’

The most recent CoreLogic home value index revealed Brisbane’s median unit price dropped by 0.1 per cent in August and 1.1 per cent compared to the same time last year.