McDowell Real Estate rentals manager Carol de Farias said demand was surprisingly high although prices haven't increased much.
"I usually have around 35 available properties in my portfolio but, at the moment, I have around 18 or 20."
Ms de Farias said a small drop in available rental properties would have affected the availability of houses. Landlords sitting on properties since the market crash are selling as prices are more profitable. However, Ms de Farias said investors have been buying property too, offsetting those who had sold.
LJ Hooker Rotorua principal Malcolm Forsyth said he wasn't surprised and the rise, and expected rent would go up more.
Mr Forsyth said they were seeing a number of landlords taking the opportunity to cash up on their investments, and a lot of properties which were previously rentals were being bought by first home buyers.
Mr Forsyth said it was a case of supply and demand, and while the demand was there for rentals there was a lack of supply.
He said landlords were taking the opportunity to reassess rent when properties became vacant and were also reassessing it periodically at inspection times.
Mr Forsyth said there was a real difficulty finding rentals - especially around the $280 to $300 price point.
Ross Stanway, chief executive of Eves and Bayleys Real Estate, said Rotorua had always been a large rental market.
"I think what is significant is the average increase which is probably a sign that a number of those involved in the rental market may have possibly sold to home owners in the past 12 months.
Mr Stanway said there had definitely been a lot of activity in the Rotorua property market in the past 12 months, with a 70 per cent increase in the volume of sales and lot of properties changing hands.
Additional reporting by Kyra Dawson
Median weekly rent:
January 2015:
* Bay Of Plenty: $340
* Rotorua: $270
*Tauranga: $375
* Western BOP: $260
* Whakatane: $300
December 2015:
* Bay Of Plenty: $370
* Rotorua: $295
* Tauranga: $400
* Western BOP: $350
* Whakatane: $295
January 2016:
* Bay Of Plenty: $395
* Rotorua: $280
* Tauranga: $425
* Western BOP: $340
* Whakatane: $310