In Auckland, the December median weekly rent fell $10 to $510, but rents were up 3 per cent on the same time last year and Aucklanders could expect rent figures to bounce back, he said.
"Auckland has been very strong in the last few months and January is a very busy time in the Super City - we wouldn't be surprised to see the median weekly rent hit another record early in 2017," Jeffries said.
Nationally, rents for all properties rose 7.1 per cent from December 2015 to last month. In Christchurch, rents fell 5 per cent.
Trade Me compiles a rental price index which it says gives a comprehensive monthly insight into the market.
"The index is produced from Trade Me Property data of properties that have been rented in the month by property managers and private landlords. On average over 11,000 properties are rented each month and the report provides a comprehensive insight into this part of the property market for tenants, landlords and investors. The index is calculated using the median rent in the month, this being an accurate statistical assessment of the current rent being charged by landlords and property managers," Trade Me says.
Last week, the Auckland Property Investors Association warned that rent hikes could be more dramatic than in previous years as landlords look to pass on the cost of rising interest rates to their tenants.