With property prices remaining high and rental availability at record lows, more Australians are looking for practical and affordable housing solutions. Granny flats, also known as secondary dwellings, are emerging as one of the fastest-growing trends in housing and property investment across the country.
A granny flat is a self-contained living unit built on the same block as an existing home. Traditionally designed for ageing parents, these small homes are now being used in new ways, from helping adult children save for their first property to providing rental income for homeowners.
One of the strongest drivers of the granny flat boom is the rise in multigenerational households. Families are pooling resources to create more flexible housing arrangements that work for everyone.
For older Australians, granny flats offer independence while staying close to family support. For parents, it means peace of mind knowing loved ones are nearby. For younger adults, it can provide affordable housing while they save for a deposit.
Queensland resident Irene Peel recently decided to move into a granny flat on her daughter’s property rather than enter aged care. Her daughter Liz told 9News, “It’s a win-win for us because she’s close. I know she is safe.” This reflects a growing trend across the country.
For many homeowners, granny flats are more than just extra living space. They are also a smart financial move. Building a secondary dwelling can increase a property’s value and provide steady rental income in markets where affordability is tight.
Research from Domain shows granny flats can lift rental yields significantly, with many homeowners achieving returns of up to 15–20 per cent depending on the build and location. For investors, this makes granny flats an appealing way to generate cash flow while adding long-term value to their property portfolio.
Building a granny flat involves upfront costs, which can range from $120,000 to $200,000 for most standard designs. Many homeowners use equity in their existing property to finance the build, while others apply for specific granny flat loans or construction loans.
Using home equity to build a granny flat is one of the most common strategies. Equity can provide access to funds without needing a separate loan, often at competitive home loan interest rates. Alternatively, a building loan can release funds in stages as construction progresses, making it easier to manage cash flow.
Speaking with a mortgage broker can help you understand which approach suits your circumstances. Lenders have different requirements, and having someone compare the options on your behalf can save time and money.
Several state governments have introduced changes to planning rules to make granny flats easier to build.
In New South Wales, homeowners can build granny flats up to 60 square metres with a fast-tracked approval process under the Affordable Rental Housing SEPP.
In Victoria, secondary dwellings are permitted in many residential zones without the need for a full planning permit.
In Queensland, streamlined approvals in some council areas have made it quicker to add a secondary dwelling.
These reforms highlight how governments see granny flats as part of the solution to Australia’s housing affordability crisis.
As housing costs rise, the appeal of granny flats is only increasing. They offer flexibility for families, create new rental opportunities, and allow homeowners to make better use of their land.
For some, a granny flat provides a way to keep family close without the need for expensive aged care or separate properties. For others, it is a property investment strategy that balances affordability with strong demand.
If you are considering building a granny flat, the right finance structure can make all the difference. Whether you want to use equity in your home, apply for a building loan, or explore lender options tailored to granny flat construction, we can guide you through the process.
Our role is to explain the different features available across lenders, so you can choose a loan structure that supports your goals. Talk to us today about granny flat loans and how you could use home equity to build or renovate.
