Housing affordability has emerged as a central political issue in Australia, with debate intensifying over the causes of rising house prices and potential solutions. While government narratives have focused on landlord practices and tax concessions such as capital gains tax and negative gearing, experts argue these factors play a less significant role compared to broader economic forces.

Fundamentally, house prices are influenced by supply and demand dynamics. Supply is shaped by planning regulations, land availability, and construction capacity, whereas demand is driven by population growth, immigration rates, borrowing capacity, and consumer confidence. Between 2007 and the onset of the COVID-19 pandemic, net overseas migration averaged approximately 233,000 people annually, escalating to a record 563,000 in 2022–23, further increasing demand for housing.

Borrowing capacity has been identified as the most significant driver of price growth over the last two decades. In 2007, the Reserve Bank cash rate stood at 6.25 percent, with mortgage rates around 8 percent. Back then, the median house price in Sydney was about $560,000, roughly 10.5 times the average yearly wage. Mortgage lending was conservative, limiting buyers to loans proportional to their incomes.

Following the Global Financial Crisis, the Reserve Bank reduced the cash rate dramatically from 7.25 percent to 3.00 percent within seven months to stimulate the economy. This resulted in lower loan repayments and greater borrowing capacity, fueling increased housing demand and price rises. Subsequent rate cuts over the next decade further enhanced borrowing power, with the cash rate reaching a historic low of 1.50 percent by 2016.

Between 2017 and 2019, despite relatively stable interest rates, Sydney house prices declined amid tighter lending standards imposed by the Australian Prudential Regulation Authority, highlighting that credit availability—not just cost—affects housing affordability.

The COVID-19 pandemic brought unprecedented conditions: the Reserve Bank lowered the cash rate to 0.10 percent, while the federal government implemented large-scale fiscal stimulus programs, including JobKeeper and JobSeeker supplements, alongside schemes like HomeBuilder. These measures, combined with mortgage rates falling below 2 percent and shifts in living preferences toward larger homes, contributed to one of Australia's largest housing booms. Meanwhile, supply-side issues such as construction delays and rising building costs compounded challenges.

Government interventions through low-deposit guarantees and shared-equity programs increased buyers’ purchasing power but did not add new housing stock, leading to heightened competition for existing homes and supporting further price increases.

Taxation and regulatory frameworks also play a notable role. Since 1976, taxes, fees, and regulatory charges associated with new house-and-land packages have increased from less than 10 percent to between one-third and one-half of total costs, varying by location. Moreover, shifts toward land tax systems have altered the tax burden in ways that may have indirectly contributed to rising prices.

Critics argue that governments, both state and federal, have a vested interest in high property values, as stamp duties and land-related taxes generate significant revenue. Some analysts suggest that restrictive planning policies intentionally or unintentionally limit supply to bolster tax income, thus exacerbating affordability problems.

Despite these challenges, experts assert that housing affordability is within the control of policymakers. Solutions would require coordinated adjustments in planning laws, lending regulations, taxation, and migration policies, alongside acknowledgment of the complex interplay between economic factors affecting supply and demand. The issue, while multifaceted, is considered reversible if governments prioritize comprehensive reform over short-term revenue gains.