Young professionals who stayed at home with their parents during the recession were now driving competition in the market for first homes.
Chief economist Tony Alexander said the need to spread wings, low interest rates, talk of housing shortages, rising rents and an improving labour market had first-home buyers out in force.
A Bank of New Zealand and Real Estate Institute of New Zealand (REINZ) survey found investor buying had dropped while first-home buyers had dominated sales.
"In contrast to investor activity, first-home buyer activity continues to rise very strongly and is perhaps the most notable feature of our survey in recent months," Alexander said.
He also noted people selling and buying again were much more likely to be downsizing rather than trading up.