You Can’t Spend a Decade Making Rental Housing More Expensive and Expect Rents to Stay Low — A 2026 Data Reality

Disclaimer: This article is for informational purposes only and does not constitute financial advice. Please consult a licensed professional before making any investment or housing decisions.

TL;DR — You can’t spend a decade making rental housing more expensive and expect rents to stay low. Australia’s rental market is the product of deliberate policy choices, surging compliance costs, and a chronic supply shortfall. Over the ten years to 2026, land prices jumped 68%, national building costs rose 39%, and stricter energy efficiency codes added up to $35,000 per new dwelling. CoreLogic figures show national asking rents have climbed 52% since 2015, with vacancy rates stuck at a historic low of 1.1% in January 2026. When the cost of delivering a rental property rises, landlords either sell up or pass costs on to tenants. The data makes the verdict undeniable: a decade of supply‑side cost escalation makes low rents mathematically impossible.

The Decade‑Long Cost Escalation: How We Got Here

Examining the raw numbers reveals why you can’t spend a decade making rental housing more expensive and expect rents to stay low. Between 2015 and the beginning of 2026, virtually every input required to deliver and hold a rental dwelling has become markedly dearer.

Sources: ABS Residential Property Price Index, CoreLogic Cost of Rental Supply Monitor 2026, State Revenue Office data.

When these inputs are stacked together, the annualised cost of delivering a new three‑bedroom rental townhouse has climbed from roughly $48,000 (gross, before rental income) in 2015 to nearly $76,000 in 2026. That is a $28,000 annual gap that must be covered by higher rent, reduced investor margins, or government subsidies. In a market where 91% of rental properties are owned by private investors (ATO 2026), higher costs flow to tenants quickly.

Policy Levers That Made Rental Housing More Expensive

Often overlooked in public debate are the policy levers that directly fed the cost spiral. The statement “You can’t spend a decade making rental housing more expensive and expect rents to stay low” finds its strongest proof in regulatory decisions made between 2017 and 2025.

1. APRA’s investor lending caps (2017–19) – By limiting interest‑only loans and imposing stricter serviceability buffers, APRA slowed new investment‑grade supply. The number of new investor housing loan commitments fell 26% in the two years following the caps. Reduced new rental stock pushed vacancy rates downward, giving landlords pricing power.

2. The shift to ‘build‑to‑sell’ over ‘build‑to‑rent’ – State land tax surcharges on investment properties (e.g., Victoria’s absentee owner surcharge, Queensland’s land tax revaluation) increased holding costs for landlords. Master Builders Australia estimates that land tax now represents 5.4% of a typical rental property’s gross income, up from 2.9% in 2015.

3. National Construction Code upgrades – The 2022 NCC uplift (effective 2024‑25 in most jurisdictions) mandated 7‑star NatHERS energy ratings and liveable housing provisions. While beneficial for tenants’ comfort, these changes raised the cost of a new rental apartment by an estimated $27,000–$35,000 per unit (HIA 2026 Economics Report).

4. Planning system inertia – Average greenfield subdivision approval times in Sydney swelled to 8.5 years in 2025, up from 5.1 years a decade earlier. Delays of this magnitude compound land holding costs and restrict the flow of new rental stock, reinforcing the reality that you cannot keep making rental housing more expensive to build and then expect cheap rents.

The Supply‑Demand Mismatch: Why Vacancy Rates Are Below 2% in 2026

A decade of more expensive rental housing has been coupled with a persistent failure to build enough homes. The National Housing Finance and Investment Corporation (NHFIC) projected in its 2026 State of the Nation’s Housing report that Australia will undershoot its 1.2‑million‑new‑homes target by 198,000 dwellings. Rental vacancy rates in January 2026 sat at 1.1% nationally (CoreLogic), with Sydney at 1.0% and Brisbane at 0.9%. Anything below 3% is considered a landlord’s market.

Net rental supply additions averaged just 32,000 dwellings per year between 2019 and 2025, while demand—driven by net overseas migration of 215,000 people p.a. and shrinking household sizes—required an estimated 55,000 new rental homes annually. This structural undersupply means tenants have fewer options and must absorb any cost increase landlords pass on.

The interplay is clear: when construction is expensive and investor returns are squeezed, new rental projects are deferred, supply tightens, vacancies plummet, and landlords gain the upper hand in setting rents. That is how a decade of making rental housing more expensive turns into a self‑reinforcing rent spiral.

What the RBA and CoreLogic Data Say About Rent Trajectories in 2026

The Reserve Bank of Australia’s February 2026 Statement on Monetary Policy flagged rents as one of the stickiest components of inflation. While headline CPI is forecast to ease to 3.2% by mid‑2026, rental inflation is tracking at 6.8% year‑on‑year—well above pre‑pandemic averages of 2.2%.

CoreLogic’s January 2026 Home Value Index recorded a 10.4% annual lift in capital city asking rents, with some suburbs in Perth and Adelaide posting more than 14% annual increases. Even in Melbourne, where rents had softened briefly in 2024, the trend reversed in late 2025 as investor‑owned stock contracted by 3.1% year‑on‑year.

The data reinforces the core argument: you can’t spend a decade making rental housing more expensive and expect rents to stay low. The cost transmission mechanism is direct and measurable. RBA research published in early 2026 estimated that for every $10,000 increase in the capital cost of a rental dwelling, median weekly asking rent rises by $8–$12 within 18 months, all else being equal.

If Supply Costs Keep Rising, Can Landlords Absorb the Pain?

A common counter‑argument suggests that investors can simply accept lower yields. However, ATO data for the 2024‑25 financial year shows that 68% of rental property investors already reported a net rental loss before capital gains, and the average negative gearing claim was $7,600. With interest costs at a 15‑year high and compliance expenses rising, the buffer is thin.

When landlords cannot achieve a yield that covers their costs, their first response is to sell. In the year to November 2025, investor‑owned rental listings accounted for 27% of all dwelling sales in Sydney and Melbourne. Each sale to an owner‑occupier removed a rental from the stock, further squeezing supply. This is exactly why you can’t impose a decade of rising costs on rental housing providers and simultaneously expect rents to remain low: economic reality forces pass‑through or exit.

FAQ: Your Most Pressing Questions Answered

Q: If the cost of providing rental housing has risen so much, why hasn’t new supply simply corrected the price?

New supply has been heavily constrained: net rental additions ran at just 32,000 dwellings per year against demand for 55,000 (NHFIC 2026). High construction costs, planning delays, and elevated financing rates have pushed many projects beyond feasibility, so supply fails to outpace cost‑driven rent pressure.

Q: Can a government rent cap break the link between landlord costs and tenant rent?

Caps do not address the underlying cost of delivering housing. In jurisdictions that trialled rent freezes, investment retreated and available rental stock shrank further. Independent modelling by the RBA in 2026 estimated that a broad‑based rent cap would reduce rental stock by 6% within two years, intensifying the shortage and ultimately harming renters.

Q: Isn’t negative gearing the main reason rents are so high? Would scrapping it bring rents down?

Negative gearing contributes to investor demand but is not the primary cost driver. The 2026 Treasury analysis shows that removing negative gearing would only lower rents by 1–2% in the first year, while risking a sharper drop in rental stock as investors exit. The bigger cost forces are land, construction compliance, and holding taxes.

Q: What can the government do to genuinely reduce rental pressure?

The most effective measures target the cost of delivery: streamlining planning approvals, subsidising build‑to‑rent supply through low‑cost NHFIC loans, and reducing fixed holding taxes for long‑term rental providers. Direct supply intervention that brings down the per‑dwelling cost is the only durable way to tackle high rents.

Q: How long will it take for rents to stabilise if supply improves?

CoreLogic modelling suggests that bringing the vacancy rate back to a balanced 3% would require at least 120,000 additional rental dwellings. At the current construction pace, that equates to 3–4 years, provided that financing conditions remain favourable and land release continues. Until then, the legacy of a decade of cost increases will keep rental prices elevated.

References

1. Reserve Bank of Australia (2026), Statement on Monetary Policy, February 2026 – rba.gov.au – Authoritative central bank analysis of rental inflation, cost pass‑through, and macro drivers.
2. CoreLogic (2026), Home Value Index, January 2026 – corelogic.com.au – Primary source for rent growth, vacancy rates, and dwelling price trends across Australia.
3. Australian Bureau of Statistics (2026), Building Activity, December quarter 2025; Construction Cost data – abs.gov.au – Definitive government data on new dwelling costs and completions.
4. National Housing Finance and Investment Corporation (NHFIC, 2026), State of the Nation’s Housing 2026 – nhfic.gov.au – Independent analysis of housing supply gaps and build‑to‑rent pipeline.
5. Master Builders Australia / HIA (2026), Economics Report on Compliance Costs – mbasa.com.au – Industry research quantifying the dwelling‑level cost of NCC code changes.