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Granny Flat Case Studies
The best way to understand granny flat arrangements is through real examples. These case studies show what works, what doesn't, and the lessons learned. Names and some details have been changed, but the situations and outcomes are based on real experiences.
The Situation
Margaret and Robert sold their Sydney home and contributed $350,000 to their daughter Sarah's mortgage in exchange for a granny flat interest. They chose this amount specifically because it was above the $267,000 threshold, making them homeowners for Centrelink purposes.
What They Did Right
✅ Proper Planning
- Engaged a solicitor early: Spent $4,200 on a comprehensive granny flat agreement before contributing any money
- Registered a caveat: Protected their interest on the property title
- Discussed with all children: Held family meetings before proceeding; adjusted will to equalise inheritance
- Checked Centrelink rules: Used calculator to confirm $350,000 was optimal for their situation
- Kept emergency funds: Retained $100,000 in accessible savings outside the arrangement
Financial Outcomes
🔑 Key Lessons
- Proper legal documentation costs a few thousand dollars but can save hundreds of thousands
- Including all children in discussions prevented resentment and will disputes
- Contributing above the threshold made them homeowners with full pension
- Keeping emergency funds gave them options if circumstances changed
The Situation
Helen sold her unit and gave $280,000 to her son David to help pay off his mortgage. In return, she moved into a converted garage on his property. There was no formal agreement—just a handshake deal.
Everything went well. Helen enjoyed being close to her grandchildren.
Tensions began between Helen and her daughter-in-law over parenting and household matters.
David and his wife separated. Wife's lawyers claimed 50% of the property, including Helen's contribution. With no legal documentation, Helen's $280,000 was treated as a gift to the couple.
Property was sold. After mortgages and legal fees, Helen received only $70,000 back—a loss of $210,000.
❌ What Went Wrong
- No legal agreement: Without documentation, her contribution looked like a gift
- No caveat: She had no registered interest in the property
- Didn't consider divorce risk: Son's marriage seemed stable at the time
- Put all eggs in one basket: Contributed her entire home sale proceeds
Financial Impact
🔑 Key Lessons
- A $3,500 legal agreement could have protected $210,000
- Even stable relationships can break down—always plan for the possibility
- A caveat on the title would have given Helen bargaining power in the divorce settlement
- Never rely on a "handshake deal" for large financial contributions
The Situation
John and Patricia considered contributing $350,000 from their home sale to their daughter's property. However, after using the calculator and consulting a financial adviser, they realised the non-homeowner strategy would give them a better pension outcome given their other assets.
The Strategy
They contributed $220,000—below the $267,000 threshold—and kept the remaining $130,000 in their superannuation. This meant:
- Non-homeowner status: Higher asset threshold ($566,000 single / $722,000 couple vs $314,000 / $470,000)
- Total assessable assets: $220,000 (granny flat) + $180,000 (other) = $400,000
- Result: Well under the non-homeowner threshold for full pension
Outcome Comparison
🔑 Key Lessons
- Bigger contribution isn't always better—run the numbers first
- The non-homeowner vs homeowner decision depends on total assets
- Keeping funds in super can be more effective than contributing everything
- Professional advice paid for itself many times over
The Situation
Barbara's family set up a granny flat arrangement when she was 76, contributing $400,000 from her home sale. What they didn't fully understand was the "reasonably foreseeable" test for aged care.
The Problem
Barbara had already shown early signs of dementia when the arrangement was made. Three years later, she needed residential aged care. The Aged Care Assessment Team (ACAT) determined that her need for care was "reasonably foreseeable" at the time of the granny flat arrangement.
❌ What Went Wrong
- Foreseeable care need: Her declining health meant aged care was predictable
- Full deprivation applied: The entire $400,000 was treated as a deprived asset
- Higher aged care fees: Means-tested fees calculated on the deprived amount
- No protected person: The granny flat was on a separate title with no spouse remaining
Financial Impact
🔑 Key Lessons
- If aged care is foreseeable, the granny flat contribution may be fully assessed as deprived
- Health status at the time of arrangement matters enormously
- The five-year rule doesn't apply if care was "reasonably foreseeable"
- Seek professional advice if there are ANY health concerns before proceeding
Common Themes Across These Cases
- Legal documentation saves money: A few thousand dollars in legal fees can protect hundreds of thousands
- Run the numbers first: Use calculators and get professional advice before committing
- Plan for the unexpected: Divorce, health decline, and family conflicts can all disrupt arrangements
- Don't rush: Arrangements made under pressure or in crisis often go wrong
- Include everyone: Involving all family members prevents resentment and disputes later
Don't Become a Cautionary Tale
Learn from others' experiences and get your arrangement right from the start.
Note on Case Studies: These case studies are composites based on real situations but with names, locations, and some details changed to protect privacy. Specific dollar amounts have been adjusted to reflect current thresholds. While the lessons are accurate, individual outcomes depend on specific circumstances.
Accuracy Note: Whilst every effort has been made to provide current and accurate information, I am only one person and there's a very good chance that I'll miss something. If you spot a factual error, or if a calculator breaks or gives incorrect answers, I'd be really grateful if you could let me know via the Contact Us page so I can fix it ASAP.
Last reviewed: 9 July 2026