Granny Flats in Melbourne
A granny flat is a self-contained secondary dwelling on the same block as an existing house. Melbourne granny flats are hugely popular for teenager retreats, aged parents, home offices and rental income, but the rules on what you can and cannot rent out separately vary by council.
Best for
- •Older parents who want independence next door
- •Adult children saving for their first home
- •Home-based businesses and studios
- •Landlords adding a second rental income stream
Typical timeline
A typical Melbourne granny flat runs 6 to 10 months from design to handover, faster than a full home because most fit under the 60m² threshold that streamlines consent.
Council & overlay notes
In Victoria, a new build generally needs a planning permit (where the local planning scheme requires one) and a building permit issued by a registered building surveyor. Overlays such as Bushfire Management, Heritage, Significant Landscape and Development Contributions can apply, and growth-area blocks may attract the Growth Areas Infrastructure Contribution (GAIC). Confirm current requirements with your local council and the Victorian Building Authority before finalising a design.
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Key decisions you'll face
Attached or detached
Detached granny flats give privacy and are easier to lease separately. Attached extensions cost less because they share a wall and services.
Can you legally rent it out?
Some councils allow separate leases, others treat granny flats as ancillary to the main dwelling. Get this in writing before you build.
Site drainage
A second roof on the same block doubles stormwater load. Councils will ask how you plan to handle it.
Where builds go wrong
Setback requirements
Most councils require the granny flat to sit a minimum distance from the boundary and the main dwelling. Under 60m² is often exempt from planning consent but still needs building consent.
Sewer connection cost
If the granny flat is more than a few metres from the existing sewer point, expect a five-figure connection cost that gets missed in early quotes.
How the process runs
- 1
Confirm your block can host one
Check setbacks, private open space and off-street parking under your council's development plan.
- 2
Decide attached vs detached
Detached gives privacy and rental flexibility. Attached saves money but limits future options.
- 3
Get quotes from granny-flat specialists
Not every builder is set up for small dwellings. Look for someone who has delivered granny flats in your council area.
- 4
Lodge for consent
Under 60m² usually needs only building consent. Larger builds need planning consent too.
- 5
Build, connect services, and move in
Construction on a slab-and-frame granny flat runs 3 to 5 months once site works start.
Common questions
How big can my granny flat be?▾
Under 60m² of habitable floor area is usually the cutoff for streamlined planning consent, though the exact rule varies by council. Larger granny flats need full development approval.
Can I rent my granny flat separately?▾
It depends on your council. Some allow separate tenancies, others only allow it to house family. Confirm with council in writing before you build.
Does it need its own driveway?▾
Not required in most cases but recommended if the granny flat is intended for a separate tenant. Off-street parking allocation matters at planning consent stage.
Will building a granny flat add to my rates?▾
Yes, adding habitable floor area typically increases your capital improved value and therefore your council rates. The uplift is usually modest.
Do I need a separate meter?▾
You can either sub-meter the granny flat under the main house account or install a separate connection. Separate is cleaner if you plan to rent it out.
People also ask
People also ask about building in Melbourne
Do I need a planning permit to build a granny flat in Melbourne?▾
Every new granny flat in Melbourne needs a building permit issued by a registered building surveyor. A separate planning permit is only triggered when an overlay applies — heritage, bushfire (BAL), significant landscape or flooding — or when you go beyond a single dwelling. Check the council planning scheme before you lock in the design.
Which council approves a granny flat in Melbourne?▾
Melbourne is covered by more than 30 metropolitan councils, so the planning scheme and overlays depend on which council your block sits in. The council administers the planning scheme and overlays, while your building permit and the mandatory inspections run through a private or municipal building surveyor.
How long does it take to build a granny flat in Melbourne?▾
A typical Melbourne granny flat runs 6 to 10 months from design to handover, faster than a full home because most fit under the 60m² threshold that streamlines consent. In Melbourne, add lead time up front for soil tests, surveyor sign-off and any overlay-driven planning permit before site works can start.
Who regulates builders and insurance for a granny flat in Melbourne?▾
Victoria's building industry is overseen by the Victorian Building Authority (VBA), which registers builders and surveyors. For domestic building work over $16,000 your builder must take out Domestic Building Insurance (through the VMIA) before you pay a deposit.
People also ask
Building a granny flat in Melbourne's top suburbs
Can I build a granny flat in Brighton?▾
Brighton is covered by City of Bayside, and most granny flat building there is around Church Street precinct, Dendy Street surrounds and near Brighton Beach.
Read the Brighton guide
Can I build a granny flat in Camberwell?▾
Camberwell is covered by City of Boroondara, and most granny flat building there is around Camberwell Junction, Burke Road and Prospect Hill precinct.
Read the Camberwell guide
Can I build a granny flat in Glen Waverley?▾
Glen Waverley is covered by City of Monash, and most granny flat building there is around Glen Waverley Activity Centre, Brandon Park and near Mount Waverley.
Read the Glen Waverley guide
Can I build a granny flat in Brunswick?▾
Brunswick is covered by City of Merri-bek, and most granny flat building there is around Sydney Road, Lygon Street precinct and near Brunswick East.
Read the Brunswick guide
Can I build a granny flat in Balwyn?▾
Balwyn is covered by City of Boroondara, and most granny flat building there is around Balwyn Road precinct, Whitehorse Road and near Balwyn North.
Read the Balwyn guide
Can I build a granny flat in Bentleigh?▾
Bentleigh is covered by City of Glen Eira, and most granny flat building there is around Centre Road precinct, near Bentleigh East and McKinnon border.
Read the Bentleigh guide
Can I build a granny flat in Preston?▾
Preston is covered by City of Darebin, and most granny flat building there is around High Street precinct, Preston Market surrounds and near Regent.
Read the Preston guideCan I build a granny flat in Box Hill?▾
Box Hill is covered by City of Whitehorse, and most granny flat building there is around Box Hill Activity Centre, Station precinct and near Box Hill South.
Read the Box Hill guideGranny Flat guidance for a specific Melbourne suburb
Local overlays, character rules and site conditions all shift the plan. Pick your suburb for a per-suburb read.
Western Melbourne
Northern Melbourne
South-East Melbourne
Also worth considering
Renovation & Extension
Renovating an existing house is often cheaper than knocking it down and starting over, especially when the bones are good and the location is prized.
Dual Occupancy
Dual occupancy is two dwellings on one title where the block is not subdivided.
Modular Home
Modular homes are built in a factory in sections, then trucked to site and craned into position.