How much does a hot water system cost?
Replacing a hot water system in Australia typically costs $1,200–$2,400 for electric or gas storage, $3,000–$5,500 for a heat pump and $4,500–$8,000 for solar, installed.
Typical price band
$2,200typical
$1,100 low$8,000 high
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Real-world examples
Like-for-like tank replacement$1,200 – $2,400
Gas continuous flow$1,700 – $3,300
Heat pump or solar upgrade$3,300 – $8,000
What affects the price
— System type. Storage tanks are cheapest installed; continuous flow mid-range; heat pump and solar highest up front.
— Like-for-like vs conversion. Changing fuel type or location adds pipework, wiring and sometimes a gas line.
— Tank size. Bigger households need larger tanks or higher-capacity units, stepping the price up.
— Rebates. Federal STCs and state schemes can reduce heat pump and solar prices by $1,000–$3,000.
— Urgency. Same-day emergency replacement limits your ability to shop around and can cost a premium.
Tips before you post
— Hot water work must be done by a licensed plumber — and a licensed gasfitter for gas units.
— Ask every quoter to state the price after rebates for heat pump and solar options.
— If your tank is over eight years old and leaking, replace rather than repair — tanks rarely come back.
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Indicative range only, not a quote. Get quotes from local tradies for an exact price. Last updated 13 July 2026.
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