With house prices still extraordinarily high, it's little wonder that so many first homebuyers are turning to the bank of mum and dad.

Now two former bank bosses - former Westpac CEO Brian Hartzer and former ANZ New Zealand CEO Dr Jenny Fagg - have started 2Be, a non-bank lender focused on the bank of mum and dad.

Brian talks to Sean Aylmer about the housing market, interest rates, and why it's so important that parents who loan money to their kids do it carefully.