For years, many New Zealanders have expected house prices to double every 10 years. But with slower house price growth, higher interest rates and a softer property market, it's worth asking whether that's still realistic or even desirable.
Will House Prices Double Every 10 Years?
The idea that house prices double every 10 years comes from a long period where strong growth became the norm. That has led many investors and homeowners to expect the same pattern to continue.
While house prices have historically delivered strong long-term growth, today’s market looks very different. Higher interest rates, weaker economic conditions and slower population growth have all contributed to a more subdued property market.
Rather than assuming the past will simply repeat itself, it’s important to look at the factors that drive house prices over the long term.
House Prices and Population Growth Go Hand in Hand
One of the biggest drivers of house prices is migration.
The relationship is relatively simple. When more people move to New Zealand, demand for housing increases. If housing supply doesn’t keep pace, prices generally rise.
Over the 12 months to March 2026, New Zealand’s net migration sat at around 24,200 people. That’s well below the long-term average of approximately 31,400 over the past 20 years.
Several factors have contributed to that slowdown, including fewer international students arriving and New Zealand becoming a less attractive destination while the economy has struggled to regain momentum following Covid.
Population growth won’t remain weak forever, but migration can have a significant impact on the property market while it does.
Cheap Money Isn't the Whole Story
Interest rates have always influenced the property market, but they shouldn’t be viewed as the only reason house prices grow.
The exceptionally low mortgage rates seen in 2021 were an unusual period rather than the norm. While cheaper borrowing generally supports property demand, relying on ultra-low interest rates as the foundation for long-term house price growth isn’t realistic.
Current mortgage rates are already below the long-term assumptions often used in financial planning, yet buyer confidence remains subdued.
That’s because confidence plays just as important a role as borrowing costs. When people feel uncertain about the economy, job security or future house price growth, they’re more likely to delay purchasing decisions.
Should We Actually Want House Prices to Double?
There’s another question that often gets overlooked.
Even if house prices could double every 10 years, would that actually be good for New Zealand?
As house prices increase, a larger share of household income is spent on mortgage repayments or rent. That leaves less money available for other spending across the economy.
If wages don’t grow at the same pace as housing costs, affordability continues to deteriorate and more pressure is placed on households.
The Reserve Bank’s debt-to-income restrictions also reflect a desire to keep house prices growing at a pace that’s more closely aligned with incomes, rather than allowing housing to become increasingly unaffordable.
What Does Sustainable House Price Growth Look Like?
House price growth isn’t necessarily a bad thing.
Over the long term, it’s reasonable to expect property values to increase alongside inflation, wages and economic growth.
The challenge is making sure those three factors remain reasonably balanced.
If incomes grow while house prices rise at a similar pace, affordability is more likely to be maintained. If house prices significantly outpace wages for an extended period, buying a home becomes increasingly difficult for future generations.
Rather than expecting house prices to double every decade, a more moderate rate of long-term growth may be healthier for both homeowners and the wider economy.
Key Takeaways
- House prices have historically delivered strong long-term growth, but past performance doesn’t guarantee the same outcome in the future.
- Migration remains one of the biggest drivers of housing demand in New Zealand.
- Slower migration has contributed to weaker house price growth in recent years.
- Ultra-low interest rates were an unusual period rather than the long-term norm.
- Buyer confidence is influenced by both mortgage rates and broader economic conditions.
- Strong house price growth isn’t always positive if incomes can’t keep pace.
- Sustainable growth is more likely when house prices, wages and inflation move together over time.
Next Steps
Whether you’re buying your first home or planning your next investment, speak with the Lighthouse Property and Mortgage teams to understand your options and build a strategy that suits your long-term goals.
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Disclaimer:
The information in this article is general information only, is provided free of charge and does not constitute professional advice. We try to keep the information up to date. However, to the fullest extent permitted by law, we disclaim all warranties, express or implied, in relation to this article – including (without limitation) warranties as to accuracy, completeness and fitness for any particular purpose. Please seek independent advice before acting on any information in this article.
