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Water Heater Replacement Cost in Australia

Water Heater Replacement Cost in Australia

Last updated on March 15, 2025

Knowing the water heater replacement cost is crucial for homeowners to budget effectively for unexpected expenses and ensure they choose a system that fits their financial and energy needs.

If you’re looking to replace your water heater, it’s important to understand the potential cost. Learn about the factors that can affect water heater replacement costs and get a better idea of what you can expect to pay. From the type of unit you choose to installation fees and more, we’ve got you covered with everything you need to know about water heater replacement cost

Types of Water Heaters and their Associated Replacement Costs


Tankless Water heater replacement cost

Tankless water heaters heat water on demand using a heat exchanger. When hot water is needed, cold water enters the unit and is heated by the heat exchanger before flowing out to the faucet or shower. This process eliminates the need for a storage tank and allows a continuous and limitless supply of hot water.

tankless water heater system

Tankless water heaters require regular maintenance to ensure optimal performance.

The cost of tankless water heaters can vary widely based on the unit’s size, type, features, and installation process. On average, tankless water heaters’ purchase and installation costs can range between $500 to $4,000.

Heat Pump Water Heater Replacement Cost

A heat pump water heater’s replacement costs range from $3,000 to $6,000. While highly priced initially, it promises to save money over time with low energy bills. Plus, the cost is further subsidized by rebates and incentives offered by the government. 

Electric Water Heaters Replacement Cost

Replacement of electric water heaters goes from $1,200 to $3,000. It is a price that will be dependent on several factors. For instance, the type of the unit, brand and size. Generally, small units are cheaper. However, additional installation or upgrade fees add to the price.

Gas Water Heaters Replacement Cost

The prices can be from $1,000 to $3,000 for replacing a gas water heater. Most storage models are cheaper than continuous flow systems. However, it depends on how tricky an installation or upgrade in a gas line would be in all these cases.

Solar Water Heaters Replacement Cost

Replacement of a solar water heater costs between $3,000 and $7,000. However, a huge investment, government rebates and lower energy bills will justify it in the long run, especially in sunny regions.

Signs you need a Hot Water System Replacement

  • It’s more than 10 years old.
  • You can see damage on it.
  • It needs fixes too often.
  • It makes a loud rumbling sound.
  • Your water has rust in it.
  • There is grit at the tank’s bottom.
  • The water isn’t hot like before.
  • You find rust around the pipes or tank.
  • Water is dripping from it.
  • Hot Water System Prices in Different Regions

Hot Water System Prices in Different Regions

The cost of water heater replacement can vary significantly depending on the region. There are several factors that can contribute to regional cost differences, including the cost of living, availability of skilled labour, local regulations, and market competition.

For example, areas with a higher cost of living generally have higher labour costs, which can drive up the overall cost of the water heater replacement. Additionally, areas with strict regulations or limited market competition may also have higher prices.

Comparison of average water heater replacement cost in different regions in Australia:

Below is a regional comparison of the approximate cost of water heater replacement for the different regions in Australia:

Sydney$1,200 – $2,500
Melbourne$1,200 – $2,500
Brisbane$1,000 – $2,000
Perth$1,000 – $2,000
Adelaide$1,000 – $2,000
Canberra $1,200 – $2,500
Darwin$1,500 – $3,000
Hobart$1,200 – $2,500

Actual Cost of Replacing a Water Heater

Replacing a water heater can be a significant expense, although it may be necessary due to age, wear and tear, or functional damage. The cost of replacing a water heater can vary based on several factors, including the type of heater, the size of the unit, and the complexity of the installation process.

In Australia, the hot water system price typically ranges between $800 to $3000, with an average cost of around $1500. This cost includes the purchase and installation of a new water heater, in addition to any necessary modifications to the plumbing or electrical networks.

The cost can also vary depending on the location and accessibility of the installation site, including site-specific additional features or upgrades that may be required. This guide will explore the different types of water heaters available in Australia and their associated costs.

Factors Affecting Water Heater Replacement Cost


There are several factors that can alter the cost of a water heater replacement. Let’s discuss each one in more detail:

A. Type of water heater:

The type of water heater you choose can have a big impact on the cost of replacement. Tankless water heaters typically have a higher upfront cost; however, since they are more energy-efficient, they allow for larger financial savings in the long run. Water heaters with storage tanks are generally less expensive upfront, but they are less energy efficient and can lead to higher energy costs over time.j

B. Size of the water heater:

The size of the water heater you need will depend on your household’s hot water requirements. Larger water heaters will cost more than smaller ones, and it’s important to select a size that can meet your household’s needs to avoid running out of hot water.

C. Efficiency of the water heater:

The efficiency of the water heater is measured by its energy factor (EF). Higher EF ratings mean that the water heater is more efficient and will allow you to save more money on energy bills. However, more efficient models may have a higher upfront cost.

D. Installation location:

The location of the water heater can also impact the cost of replacement. If the water heater is in a hard-to-reach area or if significant modifications are required to accommodate and fit the new unit, the installation cost can be higher.

E. Labor costs:

The cost of labour required for installation can vary depending on the complexity of the job, the contractor’s experience, and local labour rates.

Other Costs Associated with Water Heater Replacement


Removal of the old water heater:

The cost of removing an old water heater can vary depending on the location, the accessibility of the unit and on how complicated the process is.

In some cases, the installer may charge a flat fee for removal, while in other cases, they may charge by the hour. The cost of removing an old water heater can range between $50 to $200.

Installation of a new water heater:

The cost of installing a new water heater depends on the type of water heater being installed and the complexity of the installation. For example, a standard gas or electric tank water heater can be installed for as little as $500, while a tankless water heater installation can cost more than $3,000.

The cost of installation also includes the labour involved in connecting the water heater to the gas and electrical networks, as well as to the water supply and drainage systems.

Permits and inspections:

In many areas, a permit is required to install a new water heater, which can cost between $50 to $200, depending on the location. An inspection may also be required, and the cost of the inspection will depend on the location and on the inspector. An inspection can cost anywhere from $50 to $200.

Additional components and materials:

Depending on the type of water heater being installed, additional components and materials may be required. For example, a gas water heater may require a new gas line, and a tankless water heater may require a new venting system. The cost of these additional components and materials will vary depending on several factors, including the type and size of the water heater, as well as the location of the installation.

Factors that influence regional cost differences:


Several factors can influence regional cost differences in water heater replacement, including:

1. Cost of living

Areas with a higher cost of living generally have higher labour costs, which can drive up the overall cost of water heater replacement.

2. Availability of skilled labour

Regions with a shortage of skilled labour have more restrictive and higher labour costs, which can drive up the cost of water heater replacement.

3. Local regulations

Areas with strict regulations usually suffer from higher purchase and installation costs due to requirements to comply with codes, apply for and get permits and satisfy inspection needs.

4. Competition in the market

Areas with limited market competition have fewer product and installer options, which can lead to higher prices.

5. Transportation costs

Regions that are far away from manufacturing centres or distribution hubs suffer from higher transportation costs, which can drive up the overall cost of water heater replacement.

6. Weather conditions

Areas with extreme weather conditions may require specialized equipment, labor and materials, which can drive up the cost of the water heater replacement.

7. Taxes and fees

Different regions may have different tax rates and fees that can influence the overall cost of water heater replacement.

8. Cost of materials

The cost of materials, including the type and size of the water heater, can also impact the overall cost of replacement. Some regions may have higher material costs due to supply and demand factors.

9. Cost of energy

The cost of energy in a region can also impact the overall cost of water heater replacement. It may be wiser to install more energy-efficient water heaters in regions with higher energy costs, which may be more expensive.

10. Level of demand

Regions with a higher demand for water heater replacement services may have higher prices due to factors of supply and demand.

11. Type of water heater

Different types of water heaters, such as tankless or solar water heaters, may have different installation costs in different regions.

12. Age of the home

Older homes may require additional and more intricate work to complete the installation of a new water heater, which can increase the overall cost.

13. Access to the water heater

The location and accessibility of the water heater can impact the cost of replacement. For example, if the water heater is in a hard-to-reach location, additional labour may be required, increasing the overall cost.

14. Warranty and guarantees

Service providers may offer different warranties and work guarantees, which can alter the overall cost.

15. Size of the water heater

Larger water heaters require more labour and more materials, increasing the overall cost of replacement.

16. Seasonal factors

The time of year can also impact the cost of water heater replacement, with prices potentially higher during peak demand seasons.

Tips for Reducing Hot Water Replacement Costs


Regular maintenance

One of the best ways to reduce water heater replacement costs is by ensuring that your current water heater is regularly maintained.

Some of the measures include flushing the tank to remove sediment buildup, checking the anode rod for signs of corrosion, and inspecting the heating element or burner. Regular maintenance can extend the lifespan of your water heater and prevent expensive future repairs and replacements.

Upgrading to a more efficient water heater

Upgrading to a more energy-efficient water heater can also reduce replacement costs in the long term.

A more efficient water heater can help you save money on your energy bills and may also qualify for tax credits or other incentives that can partially offset the cost of replacement. More efficient water heaters include tankless heat pumps and solar water heaters.

Shopping around for the best deal

When it comes to water heater replacement costs, it is worth the effort to consider different options and compare prices. You may be able to land a better deal by receiving quotes from multiple contractors or retailers.

Keep in mind that the lowest price may not always be the best value, as you should consider other factors like installation quality and warranty coverage when making a decision.

Proper installation

Finally, ensuring that your water heater is properly installed is essential to prevent future problems and to reduce replacement costs.

Poor installation can often lead to leaks, floods, space damage, and safety hazards. Make sure you choose a licensed and experienced contractor who will thoroughly follow local building codes and manufacturer guidelines for installation.

Given the cost of a water heater replacement, it’s important to remember that investing in a high-quality water heater can ultimately save money in the long run. Although the upfront cost may be higher, a more efficient and durable unit will require less maintenance and use less energy, resulting in lower utility bills.

Additionally, a malfunctioning or outdated water heater can become a safety risk, forcing owners to make swift and rapid decisions.

It’s important to ensure that your water heater is functioning properly. Regular maintenance and inspection can help prevent operational problems and can extend the lifespan of your unit.

If you notice any signs of trouble, such as leaks, strange noises, or inconsistent water temperature, it’s important to contact a professional who can properly assess the problem and determine if replacement is necessary or not.

Don’t wait until it’s too late – taking proactive steps to maintain your water heater can save you time, money, and hassle in the long run.

Frequently Asked Questions

Are heat pump water heaters worth their high initial cost?

Yes. They make massive savings over time, and these savings can even recoup their installation costs. Plus, government rebates help lower costs.

Which hot water system is the most energy-efficient?

Heat pump water heaters have higher efficiency as they only transfer heat and do not create it.

What’s better: storage or instant water heaters?

Storage is ideal for high demand, while instantaneous models save energy by only heating water when required.

Why are electric water heaters so popular?

They’re cheap- from $ 1,200- and relatively easy to install. However, the running costs are much higher in the long term.

Do gas water heaters work during power outages?

Yes, they continue to operate as they are powered by natural gas or LPG, not electricity.

Can I install a water heater myself?

No. Unless fully trained, the proper installation and meeting of safety standards require a licensed plumber.

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E-Green Electrical

E-Green Electrical is a top tier energy efficiency company based in Sydney. We focus on utilising government rebates to help reduce our clients energy consumption by installing energy efficient solutions. E-Green boasts a rich heritage within the realm of energy efficiency, consistently staying up to date with cutting-edge technologies to deliver optimal results for our valued customers.

We don't just sell products and services; we also provides tips and information on how to help reduce energy consumption. We believe in using energy wisely and teaching others how to do the same. For E-Green, it’s important to share knowledge with the community. That's why we regularly write articles about saving energy, new government rebates available and increasing sustainability.

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