The 'K-Shaped' Recovery: How to Avoid Buying into an Oversupplied Suburb
- Joshua Flack
- Jul 14
- 3 min read
TL;DR
The 2026 recovery isn't lifting all areas equally. Some suburbs are firming while others sit under a glut of near-identical new stock that's suppressing rents and prices. That's the K shape: two diverging lines from the same starting point. This post is a practical guide to telling the winners from the losers before you commit capital, because buying into the wrong side of the K is the most expensive mistake available right now.
Recovery is an average. Averages hide the spread.
When the data says the market is recovering, it's blending suburbs that are firming with suburbs that are still sliding. The investor who buys "the recovery" without checking which line they're on can end up holding the losing side while the headline says everything's fine.
What Created the K Shape
Intensification policy and a wave of development concentrated new supply in specific areas. Growth corridors got flooded with townhouses. Other areas, established suburbs, supply-constrained pockets, didn't.
The result is divergence. Areas with manageable supply are recovering. Areas with a glut of identical new stock are stuck, because the oversupply caps rents and prices regardless of the broader trend.
Same city. Same "recovery." Opposite outcomes by suburb.
The Markers of an Oversupplied Suburb
Before you buy, check for these warning signs:
A high volume of recent and consented new townhouse or apartment development
Multiple near-identical listings competing at the same price point
Rising days-on-market for both sales and rentals
Rents that have flattened or fallen while other areas rise
Lots of "brand new, never lived in" rental listings competing for tenants
If you see several of these, you're looking at the bottom line of the K.
The Markers of a Firming Suburb
The other side:
Limited new supply coming (geography, zoning, or already built out)
Stock that's differentiated rather than commodity
Stable or falling days-on-market
Rents holding or rising
Genuine demand drivers (employment, amenity, transport, schools)
Scarcity is the common thread. Where supply is constrained, the recovery shows up.
Where it isn't, it doesn't.
How to Actually Check
This is desk research anyone can do:
Look at building consent data for the area
Search current listings and count how many similar properties are competing
Check rental listings and how long they've been up
Look at sold data and days-on-market trends
Twenty minutes of this tells you which side of the K a suburb is on. Most investors skip it and rely on the headline. That's the mistake.
Worked Example
Two suburbs, same city, same median price growth in the regional data.
Suburb A: 400 new townhouses consented in two years, dozens of identical rentals listed, rents down 5%.
Suburb B: built out, no significant new supply, rentals leasing in under two weeks, rents up 4%.
The regional average says both are "recovering." Suburb A will frustrate you for years. Suburb B will perform. The average lied.
Where This Leaves You
Never buy the average. Buy the suburb, and check the supply before you do. The K-shaped recovery punishes the lazy and rewards the ones who do twenty minutes of homework.
The downside of getting this wrong isn't a slightly worse return. It's holding an underperforming asset in a glutted market while everyone tells you the market's fine.
Suburb selection is where strategy gets real. We help investors pressure-test the area, not just the property, before committing.
At CRISP, the lending conversation includes whether the asset and area actually support the rent and growth assumptions you're banking on. Buy the right side of the K
Relevant tools and resources available for free here:
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About the Author:
Joshua Flack is a mortgage and lending adviser and the founder of Crisp Financial. Before finance, he spent two decades running businesses across construction, facilities services, and franchising, which is why his advice starts with how the numbers actually work rather than how the brochure says they should. He works with home buyers, investors, and self-employed borrowers across New Zealand, with particular depth in complex and non-standard lending. Crisp Financial Limited (FSP1012114) operates under the Link Financial Group FAP licence. The information in this article is general in nature and is not regulated financial advice.
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