How much does a hot water system cost in Melbourne?
Installed, a new hot water system in Melbourne runs from $840–$3,150 for an electric tank to $3,150–$6,300 for a heat pump, with gas storage at $1,250–$3,675 and continuous-flow gas at $1,575–$3,675. Victoria is pushing households off gas, and with the Solar Homes rebate and the other discounts a heat pump comes down to around $2,225–$4,725. That rebate is only for owner-occupiers, so it helps less in a city where 30.2% of homes are rented (ABS 2021 Census). The cold months matter here too: July averages a top of just 13.5 °C (BOM averages), which shapes what each system costs to run.
Comparing cities, or after the Australia-wide picture? See the national guide: Hot water system cost in Australia.
Detailed Pricing — Hot Water System Cost in Melbourne 2026
| Service | Low | Typical | High |
|---|---|---|---|
| Electric storage (supply + install) | $840installed | $1,900 | $3,150 |
| Gas storage (supply + install) | $1,250installed | $2,300 | $3,675 |
| Continuous flow gas | $1,575installed | $2,300 | $3,675 |
| Heat pump (supply + install) | $3,150installed | $4,400 | $6,300 |
| Heat pump (after rebates) | $2,225installed | $3,200 | $4,725 |
| Solar hot water | $3,675installed | $5,250 | $7,350 |
| Tempering valve install | $160per job | $260 | $420 |
| Hot water repair (general) | $160per job | $315 | $525 |
| Anode replacement | $210per job | $315 | $525 |
| Old system removal + disposal | $79per job | $135 | $210 |
| Urgent / same-day replacement (like-for-like, supplied + installed) | $1,375installed | $2,425 | $4,200 |
| Running cost (electric, annual) | $525/year | $840 | $1,250 |
| Heat pump, 250–270 L (1–3 people, supply + install, before rebates) | $3,150installed | $4,000 | $6,300 |
| Heat pump, 300–315 L (3–5 people, supply + install, before rebates) | $3,575installed | $4,725 | $7,350 |
| Hot water storage tank (electric 160–400 L or gas 135–170 L, supply only) | $945per unit | $1,475 | $2,300 |
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Get Melbourne quotes →Prices include GST. Based on Melbourne metro area, October 2026. Outer suburbs may vary.
Heat pump hot water system cost in Melbourne (2026)
A heat pump hot water system in Melbourne costs $3,150–$6,300 supplied and installed, with $4,400 typical. That is the price before any rebate: federal small-scale certificates and the Victorian scheme both apply to eligible heat pumps and change over time, so ask the installer to quote with the current rebates taken off.
| Job | Low | Typical | High |
|---|---|---|---|
| Heat pump (supply + install) | $3,150 | $4,400 | $6,300 |
| Electric storage (supply + install) | $840 | $1,900 | $3,150 |
| Gas storage (supply + install) | $1,250 | $2,300 | $3,675 |
Heat pump vs electric storage: a heat pump costs more to buy than an electric storage unit ($840–$3,150 in Melbourne) because it is a small refrigeration system rather than a heating element. It uses far less electricity to heat the same tank, so the price gap is what you pay for lower running costs; whether it pays back depends on how much hot water you use and your tariff.
What moves a heat pump quote within the band:
- Tank size: a larger tank for a bigger household costs more than a compact unit.
- Where it goes: the unit needs outdoor clearance and makes some noise, so a spot away from bedrooms and the neighbours can mean longer pipe runs.
- Electrical work: a dedicated circuit, and sometimes a switchboard upgrade, is extra.
- What it replaces: swapping a gas unit means capping the gas line; replacing an old electric storage unit is usually the simplest changeover.
- Rebate paperwork: most installers claim the certificates on your behalf and take them off the quote.
Weighing the options? The sections above compare electric, gas, continuous flow and solar for Melbourne homes.
Melbourne hot water costs by system type, and what a replacement adds
Hot water system installation cost in Melbourne, by type
Installed in Melbourne: electric storage $840–$3,150, gas storage $1,250–$3,675, continuous flow gas $1,575–$3,675, heat pump $3,150–$6,300 and solar $3,675–$7,350. The typical prices run from $1,900 for electric storage to $5,250 for solar.
Hot water system replacement cost in Melbourne
Our table prices taking the old system away separately, at $79–$210. An emergency replacement is $1,375–$4,200, typically $2,425.
Tankless (continuous flow) hot water cost in Melbourne
A continuous flow gas system, the tankless type, costs $1,575–$3,675 installed in Melbourne, typically $2,300.
These answers use the prices in the table on this page.
What Affects Hot Water System Costs in Melbourne
Gas, electric or heat pump
Swapping like for like is the cheapest installation, because the pipes, gas line and power supply are already in place. Moving from gas to a heat pump costs more on the day but ends the gas connection for hot water; Solar Victoria estimates that switching from gas to efficient electric hot water saves a household around $400 a year on energy bills.
Who gets the Victorian rebate
The Solar Homes hot water rebate is up to $1,000 for an eligible heat pump or solar system, or up to $1,400 for a locally made product. It is for owner-occupiers of an existing home whose owners earn under $150,000 in combined taxable income. The system being replaced must be at least 3 years old. You buy through an authorised retailer, who uploads a written quote, and the new system must go in within 120 days of approval (Solar Victoria).
Stacking the discounts
The Solar Homes rebate is applied after other discounts, including the Victorian Energy Upgrades hot water discount and federal small-scale technology certificates. Together, Solar Victoria says the upfront cost of a heat pump or solar system can fall by up to $1,630 (up to $2,030 for a locally made product). Ask the retailer to show each discount as its own line.
Sizing for the household
Melbourne homes hold 2.6 people on average (ABS 2021 Census), the range a 250–270 L heat pump is built for: $3,150–$6,300 before rebates. Larger families of three to five need the 300–315 L size at $3,575–$7,350. Oversizing means heating water nobody uses.
Cold winters and running costs
Melbourne sits in NCC climate zone 6, mild temperate, and July nights average 6.0 °C (BOM averages). Colder air and colder mains water make every system work harder through winter, which is when an electric storage tank is at its most expensive; our table puts a year of electric running costs at $525–$1,250.
When it fails without warning
A tank that bursts on a winter morning leaves no time to shop around. A same-day, like-for-like replacement is $1,375–$4,200, against $840–$3,150 for a planned electric swap. If the tank is still sound, a new anode at $210–$525 or a repair at $160–$525 can buy it more years.
Tempering valve and old tank
The National Construction Code limits water at bathroom outlets to 50 °C in homes, and a tempering valve does that job for $160–$420. Victorian rules exclude tempering valves from the minor plumbing work an unlicensed person may do, so it must be a licensed plumber. Taking away the old unit is $79–$210.
How to Save Money on Hot Water System Cost in Melbourne
Frequently Asked Questions — Hot Water System Cost in Melbourne
Our Methodology
These are independent estimates from public cost guides, marketplaces and industry rate data, and no tradesperson can influence them, so always get a few quotes. Last reviewed October 2026. Read our full methodology →