NZ Housing Inventory Surges to 34,000 as Sales Slide and Mortgage Repricing Loom

Executive Summary

New Zealand’s property market faced compounding headwinds in mid-October 2026 as REINZ recorded an 11.6% annual slide in September sales alongside an inventory backlog climbing to 34,001 listings. At the same time, borrowing pressure continues to mount following the Reserve Bank’s recent lift of the Official Cash Rate (OCR) to 2.75%, leaving nearly two-thirds of home loans due to reprice within 12 months.

Key Takeaways

• Sales and prices ease: REINZ figures for September 2026 show national median sale prices declined 2.3% year-on-year to $755,000, while transaction volumes fell 11.6% to 5,752.
• Inventory backlog swells: Total listings on realestate.co.nz reached 34,001 (up 11% year-on-year), with an estimated 24,500 homes sitting unsold for more than a month and over 2,600 listings withdrawn.
• North-South divide widens: All four South Island regions posted annual gains on the REINZ House Price Index, whereas all eight North Island series recorded declines.
• Mortgage repricing pipeline: NZIER reports 64% of New Zealand mortgages will reprice in the next 12 months, as major bank floating rates hover near 6.29% compared to 1-year fixed specials around 4.99%.

Inventory Overhang and Vendor Dropouts

Official data published in mid-October reveals an acute imbalance between supply and demand across the housing sector. According to realestate.co.nz, national stock reached 34,001 properties at the end of September 2026—an 11% increase on September 2025 and 50% above September 2023 levels. This total stock represents more than four times the monthly sales volume recorded by the Real Estate Institute of New Zealand (REINZ).

Analysis indicates that an estimated 24,500 homes have remained unsold after more than 30 days on the market, an overhang up 15% year-on-year. Price resistance among sellers has also triggered an uptick in campaign cancellations, with more than 2,600 properties dropping out of the market in September (a 13% annual increase) as vendors refused to meet prevailing buyer pricing.

Regional Market Breakdown and the North-South Divide

REINZ’s September report, released on 14 October, confirmed a continuing divergence across regional markets. While the national median price dropped 2.3% to $755,000, the median price for New Zealand excluding Auckland was flat at $691,200. Auckland’s median price slipped 2.6% year-on-year, driving much of the broader national softening.

The REINZ House Price Index highlighted clear geographic discrepancies: all eight North Island series contracted, while all four South Island series expanded. Southland maintained the strongest momentum, leading annual HPI growth for 14 consecutive months. REINZ Chief Executive Lizzy Ryley noted that buyers are progressing deliberately when property and terms align, while vendors increasingly need to adjust to longer selling periods, with national median days to sell stretching to 46 days.

OCR Pressures and Rate Trajectory

The Reserve Bank of New Zealand’s decision to increase the OCR to 2.75% has reinforced caution among prospective purchasers. Westpac anticipates the RBNZ will pause its tightening cycle at the late-October review before lifting the OCR to 3.00% in December, leading the bank to revise its full-year 2026 house price projection down to a 1.4% contraction.

This higher interest rate environment directly impacts household balance sheets. Data from the New Zealand Institute of Economic Research (NZIER) shows that approximately 64% of all home loan balances are due to reprice within the coming 12 months. Homeowners coming off low fixed terms from previous years face significantly higher reset rates, with major banks quoting 1-year fixed specials around 4.99% against standard floating home loan rates of roughly 6.29%.

Summary

For borrowers weighing whether to fix or float, market fundamentals favour fixing over floating in the current environment. Standard floating rates currently sit well above 6.25%, carrying a premium of approximately 130 basis points over 1-year fixed rates near 4.99%. With economists projecting the OCR to reach 3.00% by year-end rather than fall, floating offers little defensive upside and creates immediate cash flow drag. Borrowers needing budget certainty are choosing short-to-medium fixed terms (such as 1-year fixes) to protect against further near-term rate hikes while avoiding the elevated cost of staying on a floating facility.