Three Phase Power Cost in Melbourne (2026)
In Melbourne a three-phase upgrade is priced by whether the street has three-phase and the switchboard, metering and service run.
Your three phase power details
Your estimate sits within the typical range.
Your estimate sits within the typical range.
Upgrading to three-phase is worth confirming is actually needed, many homes run large loads on single-phase. The cost depends heavily on whether three-phase is already at the street or the network has to extend it.
Ways to save
- Confirm you actually need three-phase, some big appliances and EV chargers run fine on single-phase.
- Check whether three-phase is already available at your street, if not, the network upgrade is the big cost.
- Do the switchboard upgrade and any new circuits in one visit.
How we estimate this
Upgrading to three-phase power in Australia typically costs around $2,500 to $5,000 in 2026 where three-phase is already available at the street, including the switchboard upgrade. If the network has to extend the supply, it can reach $8,000 to $12,000 or more.
Pricing reviewed: October 2026.
What a three phase power costs in Melbourne
Upgrading to three-phase power in Melbourne is priced first on whether three-phase already runs in the street, since if the network's three-phase mains pass the home the work is a service upgrade from the street to a new switchboard, while if only single-phase reaches the street the distributor must extend three-phase, a far bigger job. The switchboard upgrade, the metering change and the length of the service run then make up the rest of the figure.
Three-phase is typically sought in Melbourne for a load single-phase struggles with, such as heavy ducted heating and cooling run hard through the cold winter and warm summer, a home workshop, EV fast-charging or a large home. Many older inner Melbourne suburbs and period streets were wired single-phase, so three-phase availability must be checked with the distributor and cannot be assumed. A Victorian or period home with a tight or outdated meter position adds to the switchboard work, and reactive clay movement is irrelevant to the supply but a cracked driveway can complicate an underground run. Competitive trade labour just below Sydney's keeps the install reasonable.
A three-phase upgrade is licensed electrical work that must be done by a licensed electrician in Victoria under the Victorian Building Authority, and the connection to the network is coordinated with the distributor, who must supply or confirm the three-phase service. For a Melbourne home, the clearest way to price a three-phase upgrade is by whether the street already has three-phase, then the switchboard, metering and service run.
Compare against the national picture: Three Phase Power Cost in Australia →
Three Phase Power Cost in other cities
Frequently asked questions
How is a three-phase upgrade priced in Melbourne?
First on whether three-phase already runs in the street, because if the mains pass the home the work is a service upgrade to a new switchboard, while if only single-phase reaches the street the distributor must extend three-phase, a far bigger Melbourne job.
Why upgrade to three-phase in Melbourne?
For a load single-phase struggles with, such as heavy ducted heating and cooling run hard through the cold winter and warm summer, a home workshop, EV fast-charging or a large home, which is the usual reason in Melbourne.
Is three-phase available in older Melbourne suburbs?
Not always. Many older inner Melbourne suburbs and period streets were wired single-phase, so three-phase availability must be checked with the network distributor and cannot be assumed before pricing an upgrade.
Do I need an electrician for three-phase in Melbourne?
Yes. A three-phase upgrade is licensed electrical work that must be done by a licensed electrician in Victoria under the Victorian Building Authority, and the connection is coordinated with the distributor who supplies the three-phase service.