Last updated October 2026
This guide is general information only and is not tax, legal or financial advice. Speak with a registered tax agent and a licensed finance professional about your situation.
To downsize to a granny flat, you build a smaller, self-contained home in your own backyard, move into it, and then rent out, share or hand over the main house. It lets you stay on land you know, in a neighbourhood you know, while living in a home that is easier to look after. This guide explains how the idea works in general, the Victorian rules, the questions to ask about tax and the pension, and how to plan a home that suits the years ahead.
Key takeaways
- Downsizing to a granny flat means moving into a new, smaller home on your own block instead of selling and moving away.
- The main house can be rented to tenants, shared, or lived in by family.
- In Victoria, a small second dwelling can be up to 80m², can be rented out, and cannot be subdivided or sold separately. From 15 October 2026, the maximum size of a small second dwelling increased from 60m² to 80m² under Amendment VC306. Read our guide to the 80m2 granny flat rules in Victoria (link to https://innovistagroup.com.au/80m2-granny-flat-victoria/).
- Changing how your home is used can affect capital gains tax and pension entitlements, so get advice from a registered tax agent and Services Australia first.
- A turnkey G-Flat™ costs $195,000 to $265,000 and takes approximately 5 months end to end.
What it means to downsize to a granny flat
The usual picture of downsizing is selling the family home and buying something smaller elsewhere. Downsizing to a granny flat flips that around. You keep the property, build a compact new home in the backyard and change how the main house is used.
The new home is single level, self-contained and sized for one or two people. The main house then has a new purpose. Common options include:
- Renting it out: tenants live in the main house under a residential tenancy agreement.
- Family living in it: an adult child and their family move into the main house, keeping everyone close.
- Sharing it: the main house is shared with relatives or others under an arrangement that suits everyone.
Each option has different practical, legal and financial effects, which is why advice matters before you commit.
Why some retirees consider this approach
People who downsize to a granny flat often mention lifestyle reasons first.
Staying in a familiar place
You keep your street, neighbours, local shops, clubs and medical services. For many people, that continuity matters as much as the house itself.
A home that is easier to run
A 60m² home has less to clean, heat and maintain than a large family house. A new build also means new appliances, new fixtures and a structure covered by warranty.
Family close by
If family moves into the main house, help is a short walk across the yard while everyone keeps their own front door. Read more about multi-generational living on one block.
Keeping options open
Because the granny flat stays with the property, the way you use both homes can change over time as your needs change.
Is it the right move for you?
This approach suits some people and not others. It may suit you if you:
- own a home with enough backyard space and good access for a build
- want to stay in your area for the long term
- are comfortable living close to tenants, or have family ready to move in
- have funding available for the build, such as savings or equity
It may not suit you if:
- your block is small, steep or heavily constrained by easements or overlays
- you need to release a large lump sum from your home
- you would rather not deal with tenants or a property manager
- you expect to need a level of care at home that a granny flat cannot support
Thinking through these points honestly, with family and advisers, will save time and stress later.
The rules in Victoria
In Victoria, a granny flat built under the small second dwelling rules must:
- have a floor area of 80m² or less
- include a kitchen, bathroom and toilet
- sit on the same lot as an existing home
- not connect to reticulated gas
It cannot be subdivided or sold separately from the main home. Most residential lots need no planning permit, although lots under 300m² and some overlays (such as heritage, bushfire or flood) may need one. A building permit is required in every case, and it is included in every G-Flat™.
Anyone can live in or rent out a small second dwelling, and residential tenancy laws apply when it is rented. Our guide to granny flat approvals in Victoria explains each step.
Renting out the main house
If you plan to rent the main house, you become a landlord, even though you will live right next door.
Your responsibilities as a landlord
Victorian residential tenancy laws apply to the main house, including rental minimum standards, bond rules and entry rules. Many owners use a property manager to handle the lease, inspections and repairs. Our guide on how to legally rent out a granny flat in Victoria covers the same rules that apply to any rented home.
What rent to expect
Rents vary by suburb, size, condition and demand. A local property manager can give you a rental appraisal for your main house so you can plan with real numbers.
Living next to tenants
Sharing a block with tenants works well when both homes have clear boundaries:
- separate entries and paths
- fencing or screening between outdoor areas
- agreed parking spaces
- clear rules for shared areas such as bins or a clothesline
Utilities need a plan too. Read how to split utility bills between your home and granny flat and our guide to a separate electricity meter for a granny flat.
Family living in the main house
Many people downsize to a granny flat so that an adult child and their family can move into the main house. This can work well, but it helps to agree on the details early:
- who pays for which bills, rates and insurance
- whether any rent or board will be paid
- who looks after the garden and maintenance
- what happens if circumstances change
Writing these down is a good idea, and a lawyer can help you document the arrangement properly.
A note on granny flat interests
Services Australia uses the term “granny flat interest” for a specific arrangement where a person pays for the right to live in a home for the rest of their life. It explains that you cannot hold a granny flat interest in a property you legally own, and that how an arrangement is set up can affect pension eligibility and rates. Read Services Australia’s guide to granny flat rules for an overview. If you are thinking of paying to build a granny flat on a family member’s property instead of your own, get legal and financial advice first.
Tax questions to ask
Changing how your property is used can change its tax position. The points below are general in nature.
Capital gains tax and your main residence
The ATO explains that if you rent out part or all of your home, you may not be entitled to the full main residence exemption from capital gains tax, although a partial exemption may apply. The ATO page on using your home for rental or business sets out the general rules and record keeping.
How these rules apply when you live in a granny flat and rent the main house on the same title depends on your circumstances. A registered tax agent can explain the effect for you before you build.
Rental income and deductions
If you receive rent, it will generally need to be included in your tax return, and some related costs may be deductible. Our granny flat tax and finance guide covers the basics, and your tax agent can tell you what applies.
Pension and Centrelink questions
If you receive the Age Pension or another payment, changes to how your home is used, and any income you receive from it, may affect your entitlements. The rules are detailed and depend on your situation.
Before you make a decision:
- contact Services Australia (Centrelink) about your circumstances
- consider calling the Services Australia Financial Information Service on 132 300
- speak with a licensed financial adviser about your retirement plans
Getting this advice before you sign a building contract is far easier than unwinding a decision later.
Designing a granny flat for later life
A home you plan to live in for many years should be comfortable now and adaptable later.
Choosing a floor plan
The standard G-Flat™ is a 60m², two bedroom home, and all five floor plans cost the same within each finish level:
- Lana: a balanced layout that fits most backyards
- Lana 2: adds a second bathroom, handy for guests or a carer
- Sirius: a square plan with large 4 x 3m bedrooms and an L-shaped kitchen
- Aurora: long and narrow for tight blocks, with a walk-in robe in bedroom one
- Stella: L-shaped for corner or irregular blocks
See granny flat layouts for elderly parents for ideas that also apply when you are planning for yourself.
Thinking ahead
Features worth discussing with your builder include:
- a walk-in shower with room to move
- good lighting in hallways and the bathroom
- easy to reach storage
- the path between the granny flat, the main house and the street
For more on this, read our guide to granny flat disability design.
Living with less space
Moving from a family home into 60m² means deciding what to keep. Two bedrooms with built-in robes help, and the second bedroom can work as a guest room, study or hobby space. Starting to sort belongings early makes moving day much easier.
Paying for the build
Most owners fund a granny flat through savings, home equity or a loan. Lending options and requirements vary, so speak with a mortgage broker or your bank, and with a financial adviser about how the build fits your retirement plans. Our guide on how to finance a granny flat build explains the main options.
What a G-Flat™ costs
| Finish level | Turnkey price |
|---|---|
| Affordable Lite | $195,000 |
| Affordable | $208,000 |
| Homestead | $218,000 |
| Signature | $238,000 |
| Luxe | $265,000 |
Prices are a guide for a standard 60m², two bedroom G-Flat™ and depend on your site. Sites 70km or more from the Melbourne CBD attract a 12.5% regional surcharge, sites with no driveway or tight backyard access attract a $7,000 surcharge, and sloping or elevated sites can affect the final price. A free site assessment confirms the price for your block.
Every G-Flat™ includes the building permit and all required reports, all plans, connection of services up to 10m from the main house, stone benchtops, double-glazed windows, a reverse cycle split system and a 10-year structural warranty. See our granny flat pricing in Victoria guide for more detail.
How to downsize to a granny flat, step by step
- Talk it through. Discuss the plan with family, a tax agent, a financial adviser and Services Australia.
- Check your block. Book a free site assessment to confirm what fits and the price.
- Choose a floor plan and finish level. Pick a layout that suits your block and how you want to live.
- Approvals and build. We handle the building permit and reports, and the build takes approximately 5 months end to end.
- Move in. Settle into your new home before the main house changes hands.
- Prepare the main house. Organise a property manager and rental appraisal, or agree the details with family.
Frequently asked questions
Can I live in my granny flat and rent out the main house in Victoria?
Yes. A small second dwelling can be lived in by anyone, and the main house can be rented under Victorian tenancy laws.
Will downsizing to a granny flat affect my pension?
It may. Contact Services Australia about your situation before you build.
Does it affect capital gains tax?
Renting out part or all of your home can affect the main residence exemption. Ask a registered tax agent.
Can I sell the granny flat separately later?
No. A small second dwelling cannot be subdivided or sold separately from the main home.
How long does a G-Flat™ take to build?
Approximately 5 months end to end, from planning through to handover.
Plan your move with confidence
If you are ready to explore how to downsize to a granny flat on your own block, start with an honest look at your site. Book your free site assessment or visit our display G-Flat™.