Last updated October 2026
A 1 bedroom granny flat can be a comfortable, self-contained home for one person or a couple, such as an ageing parent or an adult child wanting more independence. For many families, though, a second bedroom adds useful flexibility as needs change. Every Innovista G-Flat™ is a 60m², two bedroom home, so this guide explains when one bedroom works, when two may suit better and how to plan a granny flat around your family.
Key takeaways
- A 1 bedroom granny flat can suit a single person or couple who want a simple, compact home.
- A second bedroom can work as a guest room, study, carer’s room or hobby space.
- In Victoria, a small second dwelling can be up to 60m², with no planning permit needed in most residential zones.
- Every G-Flat™ is a 60m², two bedroom turnkey build across five floor plans.
- A free site assessment shows which layout fits your block.
What is a 1 bedroom granny flat?
A 1 bedroom granny flat is a self-contained home in the backyard of an existing house, with its own bedroom, living area, kitchen and bathroom. In Victoria, it falls under the small second dwelling rules. A small second dwelling:
- has a floor area of 60m² or less
- includes a kitchen, bathroom and toilet
- sits on the same lot as an existing home
- does not need a planning permit in most residential zones, although lots under 300m² and some overlays may need one
- needs a building permit
- cannot be subdivided or sold separately
The Victorian Government small second dwellings page explains the official rules. If you are thinking about an open-plan layout instead, our guide to granny flat studios in Melbourne compares the options.
When a 1 bedroom granny flat suits families
One bedroom can be a good fit when:
- one person or a couple will live there long term
- the backyard is small and you want to keep more outdoor space
- the occupant prefers a simple home that is easy to clean and maintain
- guests and visitors can stay in the main house
For an independent parent who wants their own front door close to family, a well-planned 1 bedroom granny flat can offer privacy and connection in a compact footprint.
When two bedrooms may suit better
Family needs often change over time. A second bedroom gives you room to adapt without building again. It can become:
- a carer’s room: space for a family member or support worker to stay overnight
- a study or home office: handy for an adult child who works or studies from home
- a guest room: for grandchildren, visiting relatives or friends
- storage or a hobby room: a place for belongings when a parent downsizes
- a second bedroom for a couple: useful when partners keep different hours
Many families find that the extra room keeps the home useful for longer, whether it houses a parent now, an adult teen later or tenants in the future.
Parents, adult teens and other family situations
Ageing parents
Parents moving closer to family often want independence with support nearby. Look for step-free access where possible, a walk-in shower, good lighting and a bedroom close to the bathroom. A second bedroom can hold a carer, visiting family or treasured furniture from the family home. See our guides to granny flat layouts for elderly parents and accessible granny flat design.
Adult teens and young adults
For an older teen or young adult, a granny flat can be a first step towards independence while staying close to home. A second room can work as a study, a gaming or music space or a room for a partner. Read can a granny flat be your teen’s first home? and kids who can’t move out.
University students
Students often need a quiet place to study. A second bedroom used as a study keeps work separate from rest. Our guide to granny flats for university students covers what to think about.
Multigenerational households
When grandparents, parents and children share one block, flexible rooms help everyone have space. Read multi-gen living on one block.
Privacy and independence on one block
Whether you choose one bedroom or two, a granny flat works for family when everyone feels at home. A few planning choices help:
- A separate entry: the occupant can come and go without walking through the main house.
- Thoughtful window placement: windows that do not look straight into the main living areas protect privacy for both homes.
- Outdoor space: a deck or small courtyard gives the granny flat its own place to relax.
- Separate utilities: a separate electricity meter can make bills simpler to manage.
- Agreed house rules: a clear conversation about visitors, shared spaces and costs before move-in avoids misunderstandings later.
These details matter as much as the bedroom count, and your site assessment is a good time to plan them.
1 bedroom granny flat vs two bedrooms at a glance
| Consideration | One bedroom | Two bedrooms |
|---|---|---|
| Suits | One person or a couple | Couples, a parent with a carer, adult teens, small households |
| Spare room | No | Yes, for guests, study or a carer |
| Future flexibility | Suits a single long-term use | Adapts as family needs change |
| Backyard space | Can use a smaller footprint | Uses up to 60m² |
How the G-Flat™ makes room for two bedrooms
Every G-Flat™ is a 60m², two bedroom turnkey home, with five floor plans to suit different blocks:
- Stella: an L-shaped plan for corner and irregular blocks
- Aurora: long and narrow for tight or side-access blocks, with a walk-in robe in bedroom one
- Lana: a balanced plan that fits most backyards
- Lana 2: adds a second bathroom, handy for a parent and carer or two adults
- Sirius: a square plan with large 4 x 3m bedrooms and an L-shaped kitchen
All five plans cost the same within each finish level. Our guides to 2 bedroom granny flat designs and every G-Flat™ layout and finish explain each plan in detail.
What it costs
| Finish level | Turnkey price |
|---|---|
| Affordable | $198,000 |
| Homestead | $208,000 |
| Signature | $238,000 |
| Luxe | $265,000 |
Prices are a guide only and depend on your site. Sites 70km or more from the Melbourne CBD attract a 12.5% regional surcharge. A free site assessment confirms the price for your block.
Each price includes the building permit, all plans, connection of services up to 10m from the main house, stone benchtops, SPC hybrid flooring, double-glazed windows, a reverse cycle split system and a 10-year structural warranty. See granny flat pricing in Victoria for the full breakdown.
Questions to ask before you choose
Before you settle on a 1 bedroom granny flat or a two bedroom layout, ask yourself:
- Who will live there first, and who might live there in five or ten years?
- Will anyone need to stay overnight to help?
- Does the occupant work or study from home?
- How much backyard space do you want to keep?
- Would you consider renting the granny flat in future?
Your block also shapes the answer. Read what makes a block suitable for a granny flat before you decide.
How long it takes
A G-Flat™ takes approximately 5 months end to end, from planning through to handover, including the building permit, construction and connection of services.
Frequently asked questions
Is a 1 bedroom granny flat big enough for a parent?
It can be for one person or a couple. Many families choose two bedrooms so there is room for a carer, guests or storage.
Does Innovista build a 1 bedroom granny flat?
Every G-Flat™ is a 60m², two bedroom home. The second room can be used as a study, guest room or carer’s room.
Do I need a planning permit?
Usually not in most residential zones, but lots under 300m² and some overlays may need one. A building permit is required.
Can a granny flat be rented out later?
Yes. A small second dwelling can be rented out, and residential tenancy laws apply.
Find the right fit for your family
Seeing the space in person is the easiest way to decide between one bedroom and two. Book your free site assessment or visit our display G-Flat™.