How much does it cost to install a hot water system in Australia?

If you’re looking for information on hot water system installation costs, you’re not alone. In Australia, installing a hot water system typically costs between $100 and $250 per task. Since water heating is the second largest segment of household energy use, choosing the right system can affect both your installation costs and long-term energy bills.

Curious to know how much a hot water system costs in your location? This guide explains average costs, factors that affect pricing, and what to expect before booking a hot water installation service.

What are the average hot water system installation costs by city?

Your location strongly influences the cost of installing a hot water system. Here’s a look at average hot water unit installation prices across major Australian cities:

*Based on recently completed tasks for hot water system installation and repair on Airtasker.

The type of hot water system you choose has one of the biggest impacts on installation costs. Each option differs in purchase price, installation requirements, energy efficiency, and ongoing running costs.

Here’s what you can expect to pay for the most common hot water system prices in Australia:

*Installation labour only. The cost of the hot water system is additional.

Electric storage hot water systems

An electric water heater stores heated water in a tank and is common in older Australian homes. It suits households without a gas connection but generally has higher running costs.

Gas storage hot water systems

Gas storage systems keep heated water in a tank, ready to use on demand, though some heat can be lost while the water sits. They suit homes with a natural gas connection and usually cost more upfront than electric units but are cheaper to run, though they’re less efficient in cold climates.

Instant or continuous flow gas systems

An instant hot water system, or continuous-flow system, heats water on demand without a storage tank, saving space and suiting larger households with higher simultaneous hot water needs.

Heat pump hot water systems

Heat pump systems use heat from the air to warm water, making them an energy-efficient choice. They have a higher upfront cost but lower running costs and may be eligible for rebates.

Solar hot water systems

Solar hot water systems use rooftop collectors to capture sunlight and heat water, making them best suited to sunny climates. Homes with less sun or long, cold nights may need a booster to maintain supply. They have the highest upfront cost of all the system types here, but can deliver the biggest long-term savings.

What factors affect hot water system installation costs?

The cost of installing a hot water system can vary depending on the type of unit, the work involved, and your location. Understanding these factors can help you budget more accurately and avoid unexpected expenses.

System type and tank size

The type of hot water unit and its capacity are among the biggest cost factors, and they also affect how much hot water the unit can deliver.

Larger storage tanks and premium systems generally take longer to install and may require additional plumbing or electrical work, but it’s usually smarter to size hot water system capacity to your household’s demand than to simply buy the largest tank.

Fuel source

Fuel source is another factor affecting installation costs. Electric systems are usually the simplest to install, while the cost of gas hot water system installation can be higher due to gas connections and licensed gas-fitting work. Solar systems may also require an electrician for additional electrical connections.

Switching fuel source

Changing from one fuel type to another, such as electric to gas or to a heat pump, typically involves additional plumbing, gas connections, or electrical upgrades and can trigger compliance work as part of the job. Older setups may also need a new tempering valve and other safety updates, which can add to the overall cost.

Location of installation

Installing a system indoors, on a rooftop, or in hard-to-access areas usually requires more labour than a straightforward ground-level installation, so labour costs tend to be higher when access issues increase labour time.

Removal and disposal of old unit

If you’re planning a hot water system replacement, removal and disposal of the old hot water unit may be included in the installation cost or charged separately. Bundling both services can often help reduce the overall cost.

How to save money on hot water system installation

Here are some practical ways to reduce your hot water system installation cost and avoid unnecessary expenses:

• Replace your system before it fails. If your hot water system is nearing the end of its expected life, planning a replacement early can help you avoid an emergency call-out and potentially higher after-hours installation fees. Add regular checks to your home maintenance checklist so you can spot signs of leaks, rust, unusual noises, or reduced performance.

• Compare quotes from different installers. Compare the total installation cost, including labour, old-unit removal, and any plumbing or electrical work. Check what’s included before booking, as the lowest quote isn’t always the best value.

• Choose a system that suits your budget and household. If your budget is tight, consider a standard-efficiency system with a lower upfront cost, while keeping long-term energy costs in mind.

• Choose the right system size. Avoid paying for a system that’s larger than your household needs. Choosing the right tank capacity can reduce the initial purchase price and prevent unnecessary energy use.

• Check government rebates and incentives. The Australian Government’s Small-scale Renewable Energy Scheme provides Small-scale Technology Certificates (STCs) for eligible solar hot water systems and air-source heat pumps, potentially saving several hundred dollars.

• Ask about combined installation and removal. If you’re replacing an old hot water unit, ask whether removal and disposal can be included in the same service. Combining may help reduce the total labour and call-out costs.

What to look for in a hot water system installer

Before hiring an installer, consider their qualifications, experience, pricing, and customer service. Ask the following questions to help you choose a suitable professional:

• Licences and qualifications: Does the installer hold the required plumbing, gas fitting, or electrical licence for the work in your state or territory? This helps ensure proper installation that’s safe, compliant, and suited to your system.

• Relevant experience: Have they installed the type of hot water system you need, and can they explain thedifferences between electric and gas systems, as well as heat pump and solar systems?

• Clear pricing: Does the quote cover labour, installation, removal, and disposal of your old unit, as well as any additional work, such as installing new tempering valves to meet safety regulations?

• Reviews and reputation: What do previous customers say about their work, reliability, and communication?

• Installation timeframe: How long will installing a new hot water system take, and could additional plumbing, gas, or electrical work affect the final cost?

Get your hot water system installed

The final price of a hot water system installation depends on the system type, installation requirements, location, and whether your old unit needs to be removed. Comparing quotes and checking available rebates can also help you manage your overall water heater installation cost.

When you’re ready to arrange your project, you can find hot water system installers on Airtasker and compare Tasker profiles, reviews, and quotes. Provide details about your system and installation needs when posting your task to receive relevant offers.