Double glazing can cost around $300–$1,500 per square metre in Australia, depending on the glass, frame, window style and installation requirements. Basic aluminium systems may sit toward the lower end, while Low-E glass, premium frames, larger windows and custom designs can increase the price.
For Melbourne homeowners, the final cost depends on the property and the type of upgrade required. Replacing a few standard windows is very different from upgrading a whole home with large openings or difficult access. Understanding the factors behind the price can make it easier to compare different glazing solutions for Melbourne properties. These options can vary depending on the window type, glass specification and installation requirements.
What Is the Typical Cost of Double Glazing?
As a general 2026 guide, double glazing can range from about $300 to $1,500 per square metre in Australia. Simpler aluminium or uPVC systems may be toward the lower end, while premium frames, specialised glass and custom designs can cost more.
This range is useful for budgeting, but it is not a fixed Melbourne price. The final quote depends on window size, glass specification, frame material, window style and installation conditions. Check whether removal, installation, sealing and disposal are included when comparing quotes.
What Affects Double Glazing Cost?
Window Size and Style
Larger windows require more glass and frame material, increasing the overall cost. Oversized panels may also need additional handling during installation.
Window style matters too. A small fixed window is generally simpler than a large sliding door, bi-fold system or opening window with specialised hardware.
Glass Type
Different glass specifications can change the price. Clear double glazing is a straightforward option, while Low-E, tinted or thicker glass can cost more.
The right specification depends on the property, orientation, sunlight exposure and comfort requirements.
Frame Material
Aluminium, uPVC and timber frames have different prices and performance characteristics. Standard aluminium is widely used, while thermally broken aluminium is designed to reduce heat transfer through the frame.
Timber can provide a different appearance and may have a higher upfront cost.
Number of Windows
Replacing one or two windows is a smaller project than upgrading an entire home. A larger project requires more materials and installation time. Having several windows measured together can also make budgeting easier.
Different double glazed glass solutions can suit different properties and project requirements. Factors such as the glass specification, frame material and window configuration can all influence the overall cost.
Does the Existing Window Condition Affect the Price?
Yes. The condition of the existing frames can change the amount of work required.
If a frame is sound and suitable for the proposed glazing, there may be options for upgrading the glass without replacing the complete system. Damaged, distorted or poorly sealed frames may need to be replaced.
Existing hardware can also affect the project. Sliding windows and doors need suitable rollers, tracks and locking components to operate properly after the upgrade.
This is why an assessment is more useful than comparing prices based only on the glass.
How Much Does Installation Add?
Installation is an important part of the total cost. Depending on the property, the work may include measuring, removing existing windows, preparing openings, fitting the new glazing, sealing and adjusting hardware.
Access can also affect the price. Upper-storey windows, restricted areas and difficult removal conditions may require additional equipment or labour.
An assessment can identify these requirements before the final quote.
How Can Double Glazing Improve Home Comfort?
Double glazing uses two panes of glass separated by a sealed space. This creates an additional barrier that slows heat transfer through the window.
It can help reduce heat loss during colder weather and limit unwanted heat transfer during warmer periods. For Melbourne homes, this can be useful where older single-glazed windows create cold surfaces in winter or allow too much heat into rooms during summer.
Performance depends on the complete window system. Glass type, frame construction, orientation, shading and installation quality can all influence the result.
Understanding Double Glazing Windows
If you are unfamiliar with the structure of double glazing, learning what double glazing windows are can help explain how the two panes, sealed space and frame work together.
This basic information can also make it easier to understand why different glass and frame specifications affect the overall price.
How Double Glazing Reduces Heat Transfer
The way the glazing system performs is also important when comparing options. Understanding how double glazing windows work provides more detail about how the insulated glass unit helps slow heat transfer through the window.
This can give homeowners a better understanding of what they are paying for when comparing different double glazing specifications.
Is Double Glazing More Expensive Than Single Glazing?
Yes. Double glazing normally costs more because it uses two panes of glass, a sealed insulating space and a suitable frame system.
The difference depends on the complete specification. A basic window will cost less than a large custom opening using premium glass and a specialised frame.
What Should a Double Glazing Quote Include?
When comparing quotes, look beyond the headline price. A detailed quote should identify:
- Number and dimensions of windows
- Glass type and thickness
- Frame material
- Low-E or other glass coatings
- Removal and disposal of existing windows
- Installation and sealing
- Hardware and finishing work
- Access requirements
- GST and additional charges
Knowing exactly what is included can help prevent unexpected costs later in the project.
Is Double Glazing Worth Considering in Melbourne?
The value of double glazing depends on the property, existing windows and the improvements the homeowner wants to make.
For an older Melbourne home with single glazing, upgrading selected windows may improve indoor comfort and reduce heat transfer. Double glazing can also be considered during renovations or new builds as part of a wider approach to improving energy performance.
It is useful to consider glazing alongside insulation, shading and draught sealing rather than looking at windows in isolation.
Understanding how much double glazing costs can help homeowners set a realistic budget before deciding which windows to upgrade.
Frequently Asked Questions About Double Glazing Costs
How much does double glazing cost per square metre?
Double glazing can cost around $300–$1,500 per square metre in Australia. The final price depends on the glass, frame, window style and installation requirements.
Is double glazing expensive in Melbourne?
The cost varies between properties. Larger windows, premium glass, specialised frames and difficult installation conditions can all increase the total price.
Is double glazing more expensive than single glazing?
Yes. Double glazing generally costs more because it uses two panes of glass and a sealed insulating space. The price difference depends on the complete specification.
Can existing windows be converted to double glazing?
Sometimes. It depends on the existing frame and whether it can accommodate the proposed insulated glass unit. Some projects may require complete window replacement.
Does double glazing reduce energy bills?
It can reduce heat transfer through windows, which may reduce heating or cooling requirements. Actual results depend on the property, glazing area, insulation and how the home is used.
What is the cheapest type of double glazing?
Standard-sized aluminium or uPVC systems are generally more affordable than premium timber frames, specialised opening systems or large custom windows. The suitable option depends on the property.
Contact Pronto Glass Australia for Your Double Glazing Services
If you are planning a glass upgrade for your Melbourne property, Pronto Glass Australia can help with options suited to your space, layout and project requirements. The team can discuss your glazing needs and recommend a suitable approach for your property.
Pronto Glass Australia also provides glass sliding door installation for homes and commercial spaces, as well as shop fronts for businesses that need practical and well-fitted glazing. Contact Pronto Glass Australia to discuss your project and arrange a quote.
Pronto Glass Australia
Phone: 0435 359 888
Email: pronto.glass@outlook.com
Address: 27 Randor St, Campbellfield, VIC 3061, Australia
