How Much Does It Cost to Replace a Hot Water System in Perth?
Hot water system replacement cost in Perth depends mainly on which type you choose. Heat pumps cost more upfront but come with rebates that bring the gap down.
Typical price
$840–$6,300 depending on system type, before rebates
Electric storage
$840–$2,625
Gas storage
$1,450–$3,000
Heat pump
$3,150–$6,300
Before rebates
Government rebates can reduce the cost of a heat pump system by $800-$1,200.
These are estimates based on typical Perth pricing, not a quote - get an exact price for your job by posting it free on Locentra.
Prices last reviewed: August 2026
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What affects the price
- System type - electric, gas, and heat pump systems have very different upfront costs.
- Tank capacity, sized to your household's hot water usage.
- Installation complexity - a straightforward like-for-like swap is cheaper than relocating the unit.
- Removal and disposal of the old system.
- Rebate eligibility, which can significantly reduce the net cost of a heat pump system.
Frequently asked questions
Why do heat pump systems cost so much more upfront?
Heat pumps use more advanced technology to extract heat from the air, which makes them more energy-efficient to run but more expensive to buy and install than a standard electric or gas system.
Are there rebates available for hot water system replacement in Perth?
Yes - rebates are available for eligible heat pump systems and can reduce the cost by $800-$1,200. Ask your installer what you currently qualify for, as rebate schemes change over time.
Is a like-for-like replacement always the cheapest option?
Generally yes - replacing an existing system with the same type in the same location avoids extra plumbing, gas fitting, or electrical work, keeping the installation cost down.
Other Perth cost guides
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