The chief executive of broking giant Aussie Home Loans, James Symond, has warned that more people risk being locked out of owning their own home if banks further tighten access to credit.

After banks have tightened credit standards "dramatically" in the last year, Mr Symond said more customers Aussie was dealing with were falling outside the lending policies of banks, which have ramped up their scrutiny of customers' living expenses.

Aussie Home Loan chief James Symond. Credit:Fairfax Media

Although he talked down the risk posed by any rise in interest rates, and said the housing market remained in reasonable shape overall, Mr Symond highlighted the risk that any further clampdown in bank lending could effectively lock some consumers out of the market.

"I’m hoping everyone is looking at it very, very carefully, because I’m seeing a credit marketplace tightening a lot, a real lot. And if we saw it tighten any more, I think that you mightn’t get the desired outcomes you want,” he said in an interview with Fairfax Media.