Wondering what a new hot water system will cost in Perth? Here are the 2026 price ranges by system type, what affects the install cost, and how to get a fast, upfront quote.
How Much Does It Cost to Replace a Hot Water System in Perth? (2026)
Replacing a hot water system is one of those jobs that tends to arrive without warning, usually the morning you least want a cold shower. If you are trying to work out what it will cost before you commit, this guide walks through the real numbers for Perth homeowners in 2026.
Quick answer: in Perth, hot water unit prices range from $1,189 to $5,900 depending on the type of system and the size you need, plus installation, which is quoted per job. The final figure comes down to the system you choose, your household size, and how straightforward the install is at your property.
Below we break down the price ranges by system type, explain what pushes the cost of a replacement up or down, and show you how to get an accurate quote without any surprises.
Hot Water System Prices in Perth by Type
The table below shows the unit price range for each type of system we supply. These are product prices only. Installation is quoted separately, because every property and every job is different.
| System type | Unit price range | Best for |
|---|---|---|
| Electric storage | $1,189 to $1,749 | Lowest upfront cost; homes without gas |
| Gas storage | $1,400 to $1,999 | Households wanting steady hot water and lower running costs |
| Continuous flow (instant) gas | $1,200 to $1,550 | Endless hot water; smaller footprint; good for most family homes |
| Instant electric | $1,400 to $1,800 | Homes without gas that want on-demand hot water |
| Solar hot water | $3,900 to $5,900 | Lowest long-term running costs; may qualify for rebates |
Across all systems, unit prices sit between $1,189 and $5,900. Remember that installation is not included in these figures, so the best way to know your total is a free on-site quote. You can also read more about each option on our hot water systems page.
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What Affects the Cost of Replacing a Hot Water System
Two homes buying the same brand of unit can end up with different totals, and it usually comes down to the install rather than the product. Here are the main factors:
- System type and size: a larger tank or a higher-flow continuous unit costs more than a compact model sized for a couple.
- Brand: different manufacturers sit at different price points for similar capacities.
- Difficulty of the install or relocation: tight access, a rooftop position, or moving the unit to a new spot all add labour.
- Switching between electric and gas: changing fuel type can mean new gas or electrical connections and extra compliance work.
- Removal and disposal of the old unit: taking away and responsibly disposing of your old system is part of the job.
- Same-day or emergency call-outs: urgent work outside a planned booking can affect scheduling and cost.
- Compliance requirements: tempering valves, safe trays, and other code items may be needed to bring the installation up to current standards.
Because these vary so much, we do not publish a single installed price. A licensed plumber assessing your property in person is the only way to get an accurate, fixed figure.
Repair or Replace: Which is Better Value
Sometimes a repair makes sense, and sometimes you are throwing good money after bad. As a general guide, replacement is usually the smarter call when:
- The system is over 10 years old and near the end of its expected life.
- You have had repeated faults or call-outs in a short space of time.
- There are visible leaks, rust, or corrosion on the tank.
- Running costs are creeping up as an ageing system loses efficiency.
A newer unit with a minor fault is often worth repairing. If you are unsure, our team can inspect it and give you an honest recommendation rather than pushing a sale. If you are stuck without hot water right now, our 24/7 emergency plumbing service can help fast.
Ways to Reduce the Cost
You cannot avoid replacing a failed system, but you can make smart choices that lower both the purchase price and what you pay to run it over the years.
- Right-size to your household: buying more capacity than you need means paying more upfront and more to run. Match the system to the number of people and your peak usage.
- Consider solar rebates: solar hot water systems can be eligible for government rebates that reduce the purchase price, which helps offset their higher starting cost.
- Choose a system with lower running costs: the cheapest unit to buy is not always the cheapest to own once energy bills are counted.
A quick note on running costs by type. Gas systems and solar are generally cheaper to run over time. Electric storage is often the cheapest to buy, but running it on standard grid power tends to be dearer than gas or solar. If you have gas connected, a continuous flow gas unit is a popular balance of upfront cost and efficiency. For homes without gas, an instant electric system is worth a look.
How to Get an Accurate Quote in Perth
Because installation depends on your property, the only way to get a genuine total is a proper assessment. Here is how we make that easy at Proud Plumbing & Gas:
- Free on-site consultation: we come to you, look at your setup, and recommend the right system.
- Fixed, upfront pricing: you get a clear quote before any work starts, with no hidden extras.
- $0 call-out fee: it costs you nothing to have us assess the job.
- Fast turnaround: same-day installation in most cases, and new systems usually fitted within 24 hours.
We are licensed plumbers and gas fitters servicing the Perth metro area, 7 days a week, with 24/7 emergency support. Call us on (08) 6185 3008 to book your free quote.
Frequently Asked Questions
How much does it cost to replace a hot water system in Perth?
In Perth, hot water unit prices range from $1,189 to $5,900 depending on the type and size of system. That is the product price only. Installation is quoted per job, because it depends on your property and setup.
How long does a hot water system replacement take?
Most straightforward replacements are completed in a few hours. In many cases we can install a new system the same day, and new systems are usually fitted within 24 hours of your booking.
Can you replace a hot water system same day?
Yes, in most cases. We offer same-day installation where possible, and new systems are usually fitted within 24 hours. Call (08) 6185 3008 and we will let you know availability.
Which hot water system is cheapest to buy and which is cheapest to run?
Electric storage is generally the cheapest to buy, starting from $1,189. For running costs, gas and solar systems are usually the more affordable options over time, while electric storage on standard grid power tends to be dearer to run.
Are there rebates for hot water systems in Perth?
Solar hot water systems can be eligible for government rebates that reduce the purchase price. Eligibility varies, so we can talk you through what may apply to your situation during your free quote.
Is it cheaper to repair or replace my hot water system?
If your system is over 10 years old, has repeated faults, or shows leaks or rust, replacing it is usually better value than paying for ongoing repairs. A newer unit with a minor fault is often worth repairing. We can inspect it and give you an honest recommendation.
Does the price include installation?
No. The ranges we quote, from $1,189 to $5,900, are unit prices only. Installation is quoted per job, because the cost depends on factors like access, fuel type, and compliance work at your property.
What size hot water system do I need?
It depends on how many people live in your home and your peak usage. Buying more capacity than you need adds to both the upfront and running cost, so our team will help you right-size the system during your free on-site consultation.
