How much does a granny flat cost in Melbourne in 2026? Here is a plain, honest answer, and the things that actually move the price. Every figure below is indicative and depends on your site. We give you a fixed price after a site assessment, so you are never guessing.
What you are really paying for
A backyard second dwelling has two parts. The dwelling itself, built in our factory. And the site work, where a local builder connects services, prepares the ground and installs it. The dwelling is predictable. The site work is where costs move.
The EcoPrestige model lineup
We build to a residential model lineup, turnkey and pre cladded. The one bedroom Orchid is 42 square metres. The two bedroom Tulip is 59 square metres and suits most backyards. The three bedroom Acacia is 84 square metres for larger blocks. All are NCC Class 1a with an Occupancy Certificate, a 12 year structural warranty and a 12 month materials warranty.
What moves the price on your block
Sewer or on site wastewater. Stormwater to a legal point of discharge. The soil class under your footings. Electrical supply and metering. Access for delivery and craning. A flat, sewered, easy access block is at the lower end. A sloped, rocky or unsewered block costs more. This is why a fixed price after a site assessment matters more than a headline number.
Two bedroom or three
The two bedroom Tulip gives most owners the strongest result for the money. A third bedroom adds real cost for a smaller rent gain, so the Acacia earns its place mainly in family suburbs where the extra room clearly rents. We help you pick the one that fits your land and your goal.
How people pay for it
Most owners fund a build with home equity or a construction loan, subject to a lender assessment. Read our full guide on how to finance a granny flat in Victoria, and check the small second dwelling rules to see what your block allows.
Frequently asked questions
How much does a 2 bedroom granny flat cost in Melbourne?
It depends on your site and finish. We give a fixed price after a site assessment rather than a headline figure, so there are no surprises.
Why do site costs vary so much?
Sewer versus on site wastewater, stormwater, soil class and access all change the site work. The dwelling itself is predictable.
Is a building permit included?
A building permit is always required and we manage it. Often no planning permit is needed for a dwelling of 60 square metres or less.