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How Much Does a Water Tank Cost?

$70 - $130 per hour

    How Much Does a Water Tank Cost?

    Water tank prices can vary considerably depending on the size of the tank, the materials from which the container is constructed, and even the colour you prefer. A water tank price also depends on the state in which the customer lives due to delivery costs and remote areas. The price of water tank can be dependent on the warranty included with the product. The average hourly price for a plumber to install a water tank is between $70 to $90 depending on the factors mentioned above.

    Below is the average hourly installation cost of a water tank in some different states in Australia:

    State Average Cost for installation
    NSW $70 – $90
    VIC $70 – $80
    QLD $80 – $90


    Factors Impacting the Cost of a Water Tank

    Type Of Tank – The type of tank you chose will have a significant impact on the price. There are many types of tanks available including, hot water, slimline, storage wall and underground, to name a few. 

    Tank Material – Water tanks can come in a variety of materials as well. Polyethylene is generally the most affordable option whilst fibreglass tends to be the most expensive. Other water tank materials include steel and concrete.

    Size Of Tank – The cost of a water tank is heavily influenced by how big it is. Tanks can range from 1,000 to 35,000 litres in size and can vary in price dramatically.

    Location of Tank – The location of the tank relates to both it’s location in Australia and it’s location on your property. A project located in a remote area will require a longer delivery time, hence, costing more. A plumber will also factor in the complexity of the installation into the price. 

    Labour Costs – A larger, more complex installation may require more labour, thus increasing the overall price.

    Tank Accessories – Pump covers, fittings and diverters, although not necessary, can increase the price of a water tank installation. 

    Price Estimates for Different Types of Water Tanks

    The prices quoted are the average in Sydney, Australia.

    Hot Water Tank (Solar Options):

    Solar hot water systems that are fully installed can cost between $2,000 and $8,500. Prices don’t usually exceed $4,500 for flat-plate collectors. Evacuated tube collectors may average more than $6,000. Heat pumps average between $3,000 and $4,000

    One of the most significant advantages of solar-powered water tanks is that they can provide between 40% and 90% of the hot water needed for your home. Solar systems are especially useful in a warm climate like Australia.

    Round Above Ground Tank:

    Size of Tank (litres) Average Reported Cost
    1,000 $450
    1,350 $500
    2,500 $700
    5,000 $900
    13,500 $2,000
    34,000 $4,400

    A 10,000 litre water tank price averages at about $1,750.

    Slimline Tank:

    Slimline tanks are an excellent option for residential neighbourhoods in urban regions where space is limited. Slimline tanks are available in sizes from 1,000 to 5,000 litres and a variety of different colours.

    Size of Tank (litres) Average Reported Cost
    1,000 $700
    2,000 $850
    3,000 $975
    4,000 $1,300
    5,000 $1,500

    Underground Tank – $400$7,500

    Bladders – $450 $10,000

    Water Pressure Tank Price – $550

    Price Estimates for Different Water Tank Materials

    Polyethylene (Poly)

    Poly tank prices vary depending on the size and style of the tank.

    Size of Tank (litres) Average Reported Cost
    1,000 $500$1,000
    5,000 $800 $1,500
    10,000 $1,700$2,500

    The average cost for a 1,000-litre tank is around $750. The 5000 litre water tank price can run as high as $2,000 for a slimline-style tank and up to $6,500 for a 46,400-litre tank. 


    The cost of water tanks for stainless steel tanks can be more expensive than tanks constructed of other materials for larger containers. The price may be reflected in the steel used to weld the parts of the tank together. 


    A fibreglass is an excellent option for harvesting and storing rainwater and for protection from fires. Fibreglass water tanks can be customized for your project and are designed to be durable. The underground water tank cost for a 3,000-litre tank is approximately $2,500.


    Sizes for residential, concrete water tanks can range from 4,000-litres to 500,000-litres and are built on-site. The concrete water tanks price for:

    Type of tank Size of tank (litres) Estimated Cost
    Class A or standard-duty tank: 33,250 $14,000
    Class B or heavy-duty tank: 33,250 $15,000
    Extra Heavy Duty without access covers: 26,150 $17,500
    Extra Heavy Duty with access covers: 33,250 $24,000


    Water Pressure Tank Prices

    Water pressure tanks with a capacity of two-litres cost approximately $75. Prices go up to around $2,000 for a 450-litre tank.

    How to Hire a Water Tank Installer

    • Find a contractor sho specializes in water tank installation
    • Make sure the applicable codes are followed
    • Determine how the installation of the water tank will be billed
    • Know the exact cost

    How to Create an Accurate Estimate

    • Determine the cost of the tank, parts, and labour
    • Length and value of the warranty
    • Type of water tank that’s needed

    Licencing and Qualifications

    Regulations and rules regarding licenced contractors and qualifications may vary between cities and states. You may have to submit a building or development application, depending on the area in which you live. Rules may apply concerning mosquito breeding preventative measures or drinking rainwater. Your area may have restrictions regarding:

    • Tank colour
    • Location of the tank
    • Labelling
    • Height 
    • Noise regulations

     The best advice is to consult your local council about water tank regulations. 

     How to Save Money Hiring a Water Tank Installer

    • Determine the size of the tank you need
    • Purchase the tank yourself
    • Compare prices of contractors before hiring



    * The cost data is based on Oneflare and third-party sources

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