Last updated October 2026
Backyard granny flats in Melbourne can work on smaller blocks when the layout suits the shape of the land and the site checks are done early. A well planned 60m² home can sit in a modest backyard and still leave room for outdoor space and privacy. This guide covers setbacks, the site checks that matter, which G-Flat™ floor plan suits which block shape, and the approvals to expect if your lot is on the small side.
Key takeaways
- In Victoria, a small second dwelling can be up to 80m² and must sit on the same lot as an existing home. 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/).
- Most residential lots need no planning permit, but lots under 300m² usually do, and every small second dwelling needs a building permit.
- Block shape matters as much as block size, so the right floor plan makes a big difference.
- Setbacks, easements, trees, slope and access are checked before any design is locked in.
- A free site assessment tells you what fits on your block and confirms the price.
Can backyard granny flats in Melbourne fit on a small block?
Often, yes. The size of the backyard matters, but so do its shape, access and what sits on or under it. A long, narrow yard can suit a slim layout, while a corner block may suit an L-shaped design that wraps around open space.
What decides whether a G-Flat™ fits:
- the usable area behind or beside the main house
- the setbacks required from boundaries and from the existing home
- easements, sewer lines and other services running through the yard
- trees you want to keep, or that are protected
- slope and soil conditions
- how materials and trades will get into the backyard
Our guide to what makes a block suitable for a granny flat in Melbourne explains each of these in more detail.
Setbacks on smaller backyards
Setbacks are the distances a building must keep from boundaries, the main house and other structures. On a small block, they shape what is possible more than almost anything else.
For small second dwellings in Victoria, the siting and amenity standards are checked in one of two ways:
- Lots of 300m² or more: the standards are generally assessed as part of the building permit.
- Lots under 300m²: the residential standards in the planning scheme apply, and a planning permit is required.
The exact distances depend on your site, the height of the walls near each boundary and any overlays. Our guide to granny flat setback requirements in Melbourne explains side, rear and front setbacks, and your site assessment confirms what applies to your block.
Site checks that matter most
Small backyards leave less room for surprises, so the early checks are worth doing properly.
Easements and covenants
An easement can stop you building over part of the yard, and a restrictive covenant on your title can limit what you build at all. Read how to check restrictive covenants before you settle on a design.
Trees
A mature tree can take up more space than it seems once root zones are allowed for. Some trees are protected by local laws or overlays. See what happens to existing trees on your block.
Services
The standard G-Flat™ is a 60m², two bedroom turnkey home, and all five floor plans cost the same within each finish level. That means you can choose the plan that suits your land without paying more for it.
Access
Builders need a way to bring materials and equipment into the backyard. Side access, driveway width and fences all affect how the build is planned.
Which G-Flat™ layout suits which block shape
Every G-Flat™ is a 60m², two bedroom turnkey home, and all five floor plans cost the same within each finish level. That means you can choose the plan that suits your land without paying more for it.
| Block shape | Floor plan to consider | Why it works |
|---|---|---|
| Corner or irregular | Stella | L-shaped plan that wraps around open space |
| Long and narrow, or tight side access | Aurora | Long, slim plan with a walk-in robe in bedroom one |
| Typical rectangular backyard | Lana | Balanced layout that fits most backyards |
| Rectangular, needing two bathrooms | Lana 2 | Adds a second bathroom |
| Wider, squarer space | Sirius | Square plan with large 4 x 3m bedrooms and an L-shaped kitchen |
Read how the Stella floor plan suits corner blocks and our 2 bedroom granny flat designs for a closer look at each plan.
Keeping outdoor space
A granny flat should not take every square metre of the yard. Good planning leaves usable outdoor space for both homes.
Ideas that help on smaller blocks:
- place the G-Flat™ to one side so a single, usable lawn or courtyard remains
- use an L-shaped plan to create a sheltered outdoor nook
- orient living areas towards the open space and north light where possible
- make use of the decking that comes with each finish level, from a landing in Affordable up to 40m² in Luxe
Landscaping and driveways are not included in a G-Flat™, so plan a budget for paths, planting and fencing if you need them.
Privacy for both homes
When two homes share a smaller site, privacy needs thought from the start.
- Window placement: avoid windows that look straight into the main house or a neighbour’s yard.
- Entry position: a separate entry and path gives each home its own way in.
- Screening: fences, screens and planting soften views between homes.
- Orientation: facing the G-Flat™ away from the main house living areas reduces overlooking.
Because a G-Flat™ is single storey, overlooking is easier to manage than with a taller building. Our guide on how to design a granny flat that feels like a full-size home has more layout ideas.
Approvals for backyard granny flats in Melbourne
In Victoria, a small second dwelling 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, and no extra car park is required. Most residential lots need no planning permit. You may need one if your lot is under 300m² or if heritage, bushfire, flood or other overlays apply. A building permit is required in every case.
The Victorian Government small second dwellings page sets out the official rules, and our guide to granny flat approvals in Victoria explains each step. The building permit and all required reports are included in every G-Flat™.
Who backyard granny flats in Melbourne suit
A small backyard can still house:
- ageing parents who want independence close to family
- adult children saving for their own home
- a home office, studio or guest space
- a tenant, under Victorian residential tenancy laws
Planning a small backyard build, step by step
A simple order of steps keeps backyard granny flats in Melbourne on track:
- Measure the usable space. Note the distance from the back of the house to each boundary, plus any sheds, pools or large trees.
- Check your title. Look for easements and covenants that limit where or what you can build.
- Confirm your lot size and overlays. This tells you whether a planning permit is likely.
- Shortlist a floor plan. Match the plan to the shape of the yard, not just the size.
- Book a site assessment. We check setbacks, services, access, slope and soil, then confirm the layout and price.
- Plan the outdoor areas. Decide on paths, fencing and planting so both homes have space to enjoy.
Taking these steps before you commit means fewer changes later and a clearer picture of what your backyard can hold.
What a G-Flat™ includes
Whichever layout you choose, every G-Flat™ comes with the building permit and reports, all plans, services up to 10m, stone benchtops, double-glazed windows, a reverse cycle split system and a 10-year structural warranty. See our granny flat inclusions in Melbourne and granny flat pricing in Victoria for the details.
A G-Flat™ takes approximately 5 months end to end, from planning through to handover.
Frequently asked questions
Do I need a planning permit for a granny flat on a small block?
If your lot is under 300m², a planning permit is usually required. Overlays can also trigger one on larger lots.
Which G-Flat™ plan suits a narrow backyard?
Aurora is designed for long, narrow or tight side access blocks.
Can I still have a garden?
Yes. Careful siting and an L-shaped or slim plan can leave useful outdoor space for both homes.
Do all floor plans cost the same?
Yes. All five G-Flat™ floor plans cost the same within each finish level, from $195,000 for Affordable Lite.
How do I find out what fits?
Book a free site assessment. We check your block and recommend a layout.
Find out what fits in your backyard
Backyard granny flats in Melbourne start with an honest look at your block. Book your free site assessment or visit our display G-Flat™.