The differences in the yields and incomes of commercial and residential property need to be better understood by investors before they commit to a portfolio allocation, a property manager has said.

RiskWise Property Research has forecast solid capital growth in the medium to long-term for property located in Parramatta despite a recent downturn in the Sydney real estate market.

National residency vacancy rates increased in most cities across Australia in December, with material increases recorded in Sydney, according to SQM Research.