Property Investors' Federation executive officer Andrew King said landlords faced rising costs, including council rates, water charges and insurance. Most had taken those extra costs "on the chin", while mortgage interest rates had remained low.
However, with the Reserve Bank hiking interest rates by a percentage point in recent months, "I think [landlords] will be looking to recoup a lot of those costs," Mr King said. "Undoubtedly rents will be rising but it doesn't necessarily mean they're going to rise at the same rate as the housing market."
Mr King predicted rents would jump by 4-5 per cent - around $20 a week on average. He expected the charges to start taking effect through spring.
A recent Crockers survey of landlords found half were not planning to hike rents in the next six months, but more than one-third planned to put them up by at least 3 per cent.
Crockers figures show rents for three-bedroom homes have surged in some Auckland suburbs, jumping 10 per cent in Mt Eden to $632, 9 per cent in the city centre to $684 and 8 per cent in Birkenhead to $551.