"While it's too early to call this a trend, it is certainly the first signs of some renewed confidence returning to the market," she said.
Buyers may also be more confident now the government has taken a capital gains tax off the table and given interest rates are at record lows, she said.
REINZ opted to publish the HPI measure, which looks at total housing market activity as opposed to a median or average price, separately. Its remaining monthly data, including the median price, sales volumes and days to sell, will be published on Friday.
REINZ says the index draws on a series of metrics to adjust sale prices for house attributes - such as land area, floor area, and the number of bedrooms - which can influence them. It is intended to provide a single, more accurate measure as a median or average sale prices can be skewed by more activity at the high- or low-end of the market.
Southland reported the strongest property value growth, with a 20.2 per cent annual increase to a record high of 3,049. This was followed by Manawatu-Wanganui with an annual growth rate of 18.3 per cent to 3,089 and Gisborne/Hawke's Bay with a 9.1 per cent annual increase to 2,738. The capital city of Wellington posted a 6.5 per cent lift to 2,707.