Upgraders have overtaken aspiring home owners as the most dominant force in the housing market for the first time this year, spurred on by the slowing price growth and rising stock, a new poll by CBRE shows.

The share of home buyers buying bigger and more expensive homes increased to 64 per cent in the past three months, up from 59 per cent during the first quarter of this year, according to residential property valuers who took part in the survey.