Sales activity cools nationally while South Island regions defy the trend
New Zealand's housing market held broadly steady on price in August, but a slowdown in sales activity and a widening gap between the North and South Islands point to a market advisers will need to navigate region by region rather than nationally.
A sharpening divide between the islands
Every South Island series on the REINZ House Price Index rose over the three months to August, while seven of the eight North Island series declined. Southland led the country with median price growth of 7.4% to $505,000, followed by Tasman, up 5.6% to $830,000. Canterbury and Otago were the only other regions to post annual HPI growth above 1%.
REINZ chief executive Lizzy Ryley (pictured) attributed the divergence to local economic and employment conditions, stock levels, and buyer demand shaping individual markets differently, rather than any single national trend.
EMBED: August 2026 Median Price Heat Map
ASB's own outlook suggests this divergence has room to run: the bank recently forecast no nationwide house price growth in 2026, with only a gradual recovery through 2027 — meaning the South Island's current outperformance may continue to stand out against a broadly flat national trend.
National figures mask the underlying slowdown
REINZ data for August shows the national median sale price at $750,000, down just 1.3% year-on-year, while sales fell more sharply, down 13.0% to 5,430 — the sixth-lowest August figure in 35 years of REINZ records. Properties took a median of 51 days to sell, three days longer than a year earlier.
Ryley said the headline stability disguises a more complicated picture underneath.
"Property values generally held steady nationally, even as transactions softened in August. Rather than significant price movement, the change was in the pace of the market, with fewer sales and properties taking longer to sell," she said.
Borrowing costs and election uncertainty weigh on sentiment
Fixed mortgage rates rose in August as banks repriced following July's wholesale swap movements, adding to borrowing capacity pressures for first-home buyers and property investors. The official cash rate held steady through the month — though the RBNZ has since lifted it to 2.75% at its 2 September review, its second consecutive hike, adding further pressure for clients weighing fixed-rate timing.
Household costs, job security, and the lead-up to November's general election also encouraged a cautious, wait-and-see approach among buyers in several regions.
Supply builds even as listings tighten
New listings fell 5.1% year-on-year to 8,326, yet national inventory climbed 9.7% to 32,908, reflecting properties taking longer to clear rather than a fresh flood of stock. Southland was the only region to record an annual inventory decline for the second consecutive month, consistent with its stronger price growth.
Ryley said stock levels are now a key differentiator between markets.
"Where buyers have a lot of options, they can take more time before deciding. In other areas with fewer new listings, competition is helping maintain momentum," she said.
For advisers, the takeaway is that national headlines increasingly understate what's happening on the ground — client conversations about borrowing capacity, timing and regional opportunity now depend more than ever on local market knowledge.
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