The short version: Replacing a hot water system in Melbourne typically costs $900–$3,500 fully installed, depending on type. Electric storage is cheapest to fit but dearest to run; a heat pump costs more upfront but can cut running costs by up to ~75%. Solar Victoria rebates of up to $1,000–$1,400 can apply, and from 1 March 2027 a failed gas system in an existing home must be replaced with electric.
What replacement costs in Melbourne, by type
Prices vary with the brand, tank size (litres), whether you're swapping like-for-like or changing fuel type, and how easy the unit is to get to. These are typical fully installed ranges for a standard suburban Melbourne home in 2026:
| System type | Typical installed price | Best for |
|---|---|---|
| Electric storage | $900 – $2,000 | Lowest upfront cost; highest running cost |
| Natural gas storage | $1,200 – $1,800 | Homes already plumbed for gas |
| Gas continuous flow (instant) | $1,500 – $2,500 | Endless hot water, no standing tank |
| Heat pump | $2,000 – $3,500 | Lowest running cost; rebate-eligible |
| Solar hot water | $3,000+ | Long-term savings where roof space suits |
Treat these as a starting point, not a quote. The same unit can vary by several hundred dollars between installers, which is exactly why getting more than one quote from a reliable tradie pays off.
What pushes the price up
Two quotes for the "same" job can differ because the scope isn't identical. Common extras:
- Relocating the unit — moving from inside to outside (or vice versa) adds plumbing and often electrical work.
- Fuel-type switch — going from gas to a heat pump may need a new electrical circuit and a different base or slab.
- Difficult access — rooftop, sub-floor, or tight side-passage installs take longer.
- Compliance upgrades — a new tempering valve, expansion control, or bringing old pipework up to current standards.
- Old system removal & disposal — usually included, but confirm it's in the quote.
- Emergency / after-hours callout — a burst tank on a Sunday costs more than a planned swap.
Rebates that bring the cost down
In Victoria, energy-efficient hot water is subsidised. Solar Victoria offers a rebate of up to $1,000 for an eligible heat pump or solar hot water system, or up to $1,400 for a qualifying locally manufactured system. Separately, Victorian Energy Upgrades (VEU) incentives can be applied at the point of sale by participating installers, discounting the price further.
Worth knowing: Rebates typically require an accredited installer and an eligible product, and the amounts and rules change over time. Confirm current eligibility with Solar Victoria before you commit, and make sure your installer is accredited to claim it.
The 2027 gas rule — why fuel type matters now
Victoria is phasing gas out of homes. From 1 March 2027, when a gas hot water system fails and needs replacing in an existing home, it must be replaced with an electric system — a heat pump or electric storage unit.
If your current gas unit is near the end of its life, that changes the maths. Replacing it with another gas system now could mean replacing it again with electric in a couple of years. For many Melbourne owners, going straight to a heat pump — and claiming the rebate — is the cheaper decision over the life of the appliance.
Renting the property out? A dead hot water system is urgent
If this is an investment property, the timeline isn't yours to set. Under Victorian rental law, a failure of an appliance or service that supplies hot water is on the urgent repairs list — it must be arranged immediately, not booked in for next week. If you can't be reached, the renter can arrange the repair themselves up to $2,500 and you must reimburse them within 7 days.
We cover the full obligations — urgent vs non-urgent repairs, the 14-day rule and renter remedies — in our guide to self-managing a rental in Victoria, and the related safety-check duties in our Victorian gas & electrical safety checks guide.
How to not overpay
- Get at least three quotes for the same scope — like-for-like, not apples to oranges
- Ask what's included: removal, disposal, tempering valve, and any compliance upgrades
- Check the installer is licensed (plumbing/gas/electrical) and rebate-accredited
- Confirm the Solar Victoria rebate or VEU discount is applied before you pay
- Factor running cost, not just sticker price — a heat pump's higher upfront often pays back
- For a rental, act immediately and keep the invoice and photos for your records
Get competitive hot water quotes — fast
PropCommand lets Melbourne owners post a hot water job in plain language and receive competitive bids from vetted local tradespeople, side by side, with every quote, invoice and photo kept on one audit trail. No cold-calling five plumbers on a Sunday.
Frequently asked questions
How much does it cost to replace a hot water system in Melbourne in 2026?
As a guide, roughly $900–$3,500 fully installed depending on type. Electric storage is typically $900–$2,000, natural gas storage $1,200–$1,800, gas continuous flow around $1,500–$2,500, and heat pumps $2,000–$3,500 installed. Solar can run higher. Difficult access, relocating the unit, or upgrading pipework and wiring can add to these figures.
What is the cheapest hot water system to replace?
Electric storage is the cheapest to buy and install, typically $900–$2,000 fitted, but usually the most expensive to run. A heat pump costs more upfront ($2,000–$3,500 installed) but can cut hot water running costs by up to about 75%, and rebates narrow the gap.
Are there rebates for replacing a hot water system in Victoria?
Yes. Solar Victoria offers up to $1,000 for an eligible heat pump or solar system, or up to $1,400 for a qualifying locally manufactured system, subject to eligibility. Victorian Energy Upgrades (VEU) incentives may also reduce the price. Amounts and rules change, so confirm before you commit.
Can I still install a gas hot water system in Victoria?
For now, yes in existing homes — but from 1 March 2027, when a gas hot water system fails in an existing Victorian home it must be replaced with an electric system (heat pump or electric storage). If you're replacing a unit near end of life anyway, going electric now can avoid replacing it twice.
Is a failed hot water system an urgent repair in a rental?
Yes. In a Victorian rental, a failure of an appliance or service that supplies hot water is on the urgent repairs list, so it must be arranged immediately — not scheduled for the following week.
This article is general pricing information for Melbourne property owners and is not a quote or professional advice. Prices are indicative for 2026, vary by installer and site, and change over time. Rebate amounts and eligibility (including Solar Victoria and Victorian Energy Upgrades) and the 2027 gas replacement rule are set by the Victorian Government — always confirm the current details with Solar Victoria and use a licensed, accredited installer before making a decision.