Landlords continue to reap the benefits of the lack of rental supply in Whanganui.
Whanganui Harcourts real estate agent Sue Ellis said there was a real shortage of quality properties in the region, and the River City was experiencing the same supply problem as Auckland.
Property Institute predictions released last week listed the cost of rent as the number one issue for 2018.
"The cost of renting will replace the price of housing as the number one housing issue in 2018," said institute chief executive Ashley Church.
"The housing polices of the new government, combined with uncertainty around housing investment over the next few years, will 'scare' some property investors out of the market, creating a crisis in the number of dwellings available for rental."