Victoria’s granny flat regulations changed substantially in December 2023, and many homeowners are still catching up with what the reform actually allows. Understanding the granny flat regulations Victoria has in place right now is the first step before spending money on a design, since the rules determine whether a project needs council sign-off at all. This guide by the best builders in Australia walks through what qualifies as a granny flat, when a planning permit is still required, what a building permit involves, and what the whole project tends to cost.
What Counts as a Secondary Dwelling in Victoria?
A granny flat is officially classified as a small second dwelling, also called a secondary dwelling or accessory dwelling unit. It is a self-contained home, complete with its own kitchen, bathroom, and living space, built on the same lot as an existing house. Under the Building Regulations 2018, it falls into the same building classification as a standard house, Class 1a, and must meet the same structural and safety standards.
One detail that catches people out: the lot needs an existing dwelling already on it. A granny flat cannot be the first or only home built on a vacant block, and it cannot later be split off onto its own title.
A secondary dwelling is designed to function as an independent home rather than simply an extra bedroom or converted living area within the main house. For example, a backyard building with a bedroom, bathroom, kitchen and living area can qualify, whereas a detached room without the facilities needed for independent living may not meet the same definition.
The size of the dwelling is also important when considering the current granny flat regulations Victoria. The 60-square-metre threshold is particularly relevant to the planning permit exemption introduced under the 2023 reforms. Homeowners should therefore decide early whether they actually need a two-bedroom layout or whether a smaller one-bedroom design would provide everything required.
Why Homeowners Are Building Granny Flats in Victoria
Most Victorian granny flat projects fall into one of three categories. Ageing parents want to stay close to family without moving into aged care, so a self-contained unit in the backyard offers independence with support nearby. Adult children move into the second dwelling while saving for a home of their own, keeping housing costs down without losing privacy.
A growing number of homeowners build purely for rental income, using the extra dwelling to help cover a mortgage. A one or two-bedroom rental may generate around $450 to $650 a week depending on location and finish, although actual rental returns vary considerably between properties.
The intended use can also influence how the dwelling is designed. If the property will eventually be rented, features such as a separate entrance, private outdoor area and practical kitchen storage can make it more appealing to tenants.
Granny Flat Regulations Victoria: When No Planning Permit Is Required
Before the 2023 reform, most small second dwellings needed a full planning permit, adding months and consultant fees to a project. That changed with Amendment VC253. In many cases, a small second dwelling of 60 square metres or less no longer needs a planning permit, provided the land is not affected by relevant planning controls.
These may include:
- A heritage overlay
- A bushfire management overlay
- A flood or land subject to inundation overlay
- An environmental or vegetation protection overlay
- Other special planning controls specific to the site
The exemption is not automatic just because the floor area fits under 60 square metres. Checking the property’s zoning and any overlays through Planning Maps Online, or speaking with the council’s duty planner, is worthwhile before committing to a design.
This is one of the most important parts of understanding granny flat regulations Victoria. A property may appear suitable from the street but still have restrictions that affect where or how a secondary dwelling can be built.
An easement running through the backyard, for example, may reduce the available building area. Similarly, an overlay may change whether the planning permit exemption applies. Checking these details before paying for detailed architectural drawings can prevent expensive redesigns later.
Granny Flat Permits Victoria: The Building Permit You Still Need
Skipping the planning permit does not mean skipping approval altogether. Every small second dwelling still needs a building permit, issued by a registered building surveyor rather than the local council’s planning department.
Victorian building permits confirm that the design meets the National Construction Code, along with applicable Victorian requirements, including:
- Compliance with relevant NCC provisions
- Energy-efficiency requirements
- The Livable Housing Design Standard where applicable
- Construction carried out by a registered builder
Under Victoria’s building regulations, projects valued over $20,000, which covers almost every granny flat build, also require Home Warranty Insurance taken out by the builder on the homeowner’s behalf.
Understanding the difference between planning and building permits is essential. A planning permit relates primarily to how the development fits within planning controls, while a building permit focuses on whether the actual building complies with construction and safety requirements.
Site Rules That Still Apply Even Without a Planning Permit
Removing the planning permit requirement does not remove every rule about where and how the dwelling sits on the block. A building surveyor will still check:
- Minimum side and rear setbacks from boundaries
- Height limits appropriate to the zone
- Separation distance from the primary dwelling
- Approved connections for power, water, sewer or septic, and stormwater
The layout of the existing property can make a significant difference to the final design. A narrow backyard may require a compact floor plan, while a larger block could provide enough room for separate access and private outdoor areas.
Access for construction is another factor that is easy to overlook. If materials, machinery or tradespeople cannot easily reach the backyard, construction may become more complicated and expensive.
Privacy should also be considered from the beginning. Window placement, fencing, landscaping and the orientation of the granny flat can help prevent direct views between the two dwellings.
A second dwelling may also need its own metering or sub-metering arrangement, particularly if it will be rented separately from the main house. Established trees, easements and covenants on the title can also affect where the dwelling sits.
What Does It Cost to Build a Granny Flat in Victoria?
Cost varies with size, site conditions and finish level, but current pricing across Victoria provides a useful planning benchmark:
- A one-bedroom granny flat: roughly $110,000 to $170,000 turnkey
- A two-bedroom granny flat: roughly $180,000 to $260,000 turnkey
- Turnkey construction: generally around $2,300 to $3,500 per square metre
- Difficult sites: potentially $10,000 or more in additional site costs
- Landscaping and privacy screening: typically $5,000 to $15,000
The headline construction price is not necessarily the total amount a homeowner will spend. Additional expenses can include surveying, soil testing, engineering, service connections, site preparation, landscaping and other property-specific requirements.
This is why comparing quotes on a like-for-like basis is important. One builder may include design, site works and service connections, while another may list some of these as additional or provisional costs.
Cost per square metre for a granny flat can also be higher than for a full-sized new home because fixed costs such as the kitchen, bathroom and utility connections are spread across a smaller floor area.
A builder like Sarao Builders can help homeowners understand these costs upfront and provide a clearer picture of what is included in the overall project price.
Can You Rent It Out or Sell It Separately?
A granny flat cannot be subdivided or sold separately from the main house. It stays on the one title for as long as the property is owned.
Renting it out is a different story. Current granny flat regulations Victoria allow eligible small second dwellings to be rented on the open market, subject to applicable residential tenancy requirements.
If the intention is to rent the property, the design should be considered from a tenant’s perspective. A separate entrance, practical kitchen, adequate natural light, laundry facilities and private outdoor space can make the dwelling more functional and attractive.
Homeowners should also think about shared driveways, bins, outdoor areas and utility arrangements. Planning these details early can make managing two households on one property much easier.
Getting Granny Flat Approval Without the Guesswork
The most common mistake is designing first and checking the planning scheme second. A faster approach is to confirm zoning, overlays and site constraints before a single drawing is finalised.
Sarao Builders handles this sequence for clients across Victoria, coordinating the design and approval process and helping homeowners understand the requirements before construction begins.
For anyone researching granny flat regulations Victoria, getting professional advice early can make the difference between a straightforward project and one that requires costly changes later.
Frequently Asked Questions
Do I need a planning permit to build a granny flat in Victoria?
In most cases, no, provided the dwelling is 60 square metres or less and the property has no flooding, environmental, or heritage overlays. A building permit is still always required.
How much does it cost to build a granny flat in Victoria?
Most standard builds fall between roughly $120,000 and $250,000, depending on size, finishes, and site conditions, though smaller or more basic projects can cost less.
Can I rent out a granny flat in Victoria?
Yes, small second dwellings can be rented to anyone, including unrelated tenants, once an occupancy permit has been issued. This differs from the older, more restrictive dependent person’s unit rules.
Can I sell a granny flat separately from the main house?
No. A small second dwelling must remain on the same title as the main home and cannot be subdivided or sold off separately.
How long does it take to get a building permit for a granny flat?
Timelines vary, but building permits for compliant small second dwellings are commonly issued within two to four weeks through a registered building surveyor.