The Hidden Costs of New Homes: How Taxes Are Driving Australians Towards Granny Flats
Introduction
Australia’s housing crisis has reached alarming levels, with affordability slipping further out of reach for many prospective homeowners.
A recent report by the Housing Industry Association (HIA) has unveiled a staggering revelation: in Sydney, government taxes, regulatory costs, and charges account for $576,000—or half—of the cost of a new house and land package.
This financial burden is prompting many Australians to explore alternative housing solutions, such as purchasing existing homes or constructing granny flats.​

The Impact of Taxes on New Home Builds
The HIA’s report, commissioned from the Centre for International Economics (CIE), highlights several critical findings:​ Housing Taxation Doubles in just Five Years
- Sydney: Taxes and charges have increased by 38% since 2019, adding $160,000 to the cost of a new house and land package. ​
- Brisbane: The largest surge occurred here, with taxes more than doubling—rising by $179,000 or 106% compared to 2019.
- Apartments: In Sydney, government-imposed costs constitute $346,000, or 38%, of the total price of a new apartment. ​
HIA Chief Economist Tim Reardon emphasizes the severity of the situation:​
“In Sydney, governments are adding in excess of half a million dollars to the cost of a new home, that new home buyers are then required to repay for decades as part of their mortgage.” ​
These escalating costs not only deter potential buyers but also exacerbate the housing shortage by hindering new constructions.​
The Shift Towards Existing Homes and Granny Flats
Faced with these prohibitive expenses, many Australians are reconsidering their housing options. The market is witnessing a noticeable shift towards purchasing existing homes, which, despite their own set of challenges, often come without the hefty tax burdens associated with new builds.​
Additionally, granny flats are emerging as a viable and cost-effective alternative. These secondary dwellings offer several advantages:​
- Affordability: Constructing a granny flat is generally less expensive than building a new home, with fewer associated taxes and regulatory costs.​
- Flexibility: They provide versatile living arrangements, suitable for extended family, rental income, or as a home office.​
- Efficiency: Granny flats typically require shorter approval times and can be built more quickly than traditional homes.​
By opting for granny flats, homeowners can circumvent some of the financial and bureaucratic hurdles that plague the current housing market.​
Conclusion
The revelations from the HIA’s report underscore a pressing issue in Australia’s housing sector: exorbitant taxes and regulatory costs are significantly inflating the prices of new homes, making them unattainable for many.
As a result, Australians are increasingly turning to existing properties and granny flats as practical solutions to their housing needs. Addressing these tax burdens is crucial for alleviating the housing crisis and making homeownership a realistic goal for more individuals.​
For a deeper insight into the factors driving Australia’s housing shortage, listen to Tim Reardon of the Housing Industry Association discuss the issue in detail:​