How much do double glazed windows cost in Australia in 2025?

Double-glazed windows cost between $800 and $2,500 per window installed, depending on size and material.

Key Takeaways Installing double-glazed windows typically costs between $800 and $2,500 per window in Australia, with whole-house installations ranging from $8,000 to $30,000. Material choice significantly impacts price, with uPVC being the most affordable and timber frames commanding premium prices. Energy savings from double glazing can reduce heating and cooling costs by 20–30% annually.

Ever walked into someone’s house on a scorching summer day and wondered why it feels so cool without the air conditioner blasting? Check if they have double-glazed windows because it might be one of the reasons. While the cost of double-glazed windows can seem steep at first, homeowners who install them enjoy lower power bills.

Double-glazed window costs vary depending on whether you want basic aluminium frames or fancy timber ones and whether you’re fitting out a compact unit or a sprawling family home. Here’s what you need to know about double-glazed window costs in 2025.

How much do double-glazed windows cost in 2025?

Disclaimer: Oneflare’s cost estimates come from thorough research on industry and third-party rates. Please only use the listed prices as a benchmark when setting your budget. Moreover, as different areas have local taxes and service fees, the rates listed below are subject to change.

When researching the cost of double-glazed windows Australia-wide, you’ll find prices vary significantly based on frame material, size, and style. Here’s a detailed double-glazed window price list of current and typical pricing:

Material type	Average cost (per window)	Benefits
uPVC	$800 – $1,500	Most affordable, good insulation
Aluminium	$1,200 – $2,000	Durable, low maintenance
Timber	$1,500 – $2,500	Premium look, excellent insulation

uPVC double-glazed windows

uPVC (unplasticised polyvinyl chloride) frames offer excellent value for money, combining good insulation properties with durability. These windows typically cost between $800 and $1,500 per window installed, making them the most budget-friendly option for double glazing. uPVC frames are particularly popular in new builds and renovation projects where cost-effectiveness is a priority.

Aluminium double-glazed windows

Aluminium frames, on average, cost $40 to $300 per m2, but that depends on several factors. They offer superior durability and require minimal maintenance. Due to their corrosion resistance, they’re ideal for coastal areas and are available in a wide range of colours and finishes.

Timber double-glazed windows

Timber frames represent the premium end of the market, costing between $1,500 and $2,500 per window installed. Timber frames combine excellent insulation with a classic, high-end appearance, making them popular in heritage properties and high-end residential projects.

That said, timber frames require more maintenance, including periodic repainting. See our guide on how to paint window frames, including timber frames.

Double-glazed windows consist of two panes of glass separated by a sealed 12–20 mm gap filled with inert gas, such as argon. This insulating barrier maintains indoor temperature and reduces noise transmission while enhancing thermal performance.

Modern double-glazed windows offer significant benefits compared to traditional single-pane windows. These include:

• Superior thermal insulation reduces heating and cooling costs.
• Cuts external noise by as much as half, particularly valuable in urban areas.
• Improved security due to stronger construction.
• Reduced condensation on window surfaces.
• Higher property value and market appeal.

How much does a double glazed window cost? It depends on the style you choose. 

Double-glazed windows rarely come in a standard package. Most window styles complement a particular architecture, so if you want a double-glazed window for your specialty window, expect to pay a premium price.

That said, here are some average costs for typical window styles:

Casement windows

How much to double glaze a window of the casement style? Casement windows open like a door, catching cross-breezes and offering full ventilation from top to bottom. They’re a popular choice for modern Australian homes, with prices ranging from $280 to $1,500 installed. The simple crank mechanism means less can go wrong over time, making them a reliable long-term investment.

Tilt and turn windows

Tilt and turn windows offer the best of both worlds, since they can either swing open fully or tilt inward from the top. While they sit at the higher end of the price range starting at $1,000 (installed), their versatility makes them worth considering, especially for upper floors where easy cleaning access matters.

Sliding windows

Sliding windows are ideal for wider openings and rooms with great views. The cost to double glaze a window of this style is relatively economical thanks to their straightforward design and smooth operation. Average installation costs between $420 and $2,000. Since they’re less complex to install than other styles, they often work out better for larger spaces.

Fixed windows

Fixed windows might not open, but they excel at their main job: bringing in natural light while keeping the elements out. As the most straightforward option, they’re also the most affordable at $300 to $700 installed. They’re particularly effective for high spaces or areas where ventilation comes from other sources.

Understanding double-glazed window prices starts with knowing the key factors that influence the final cost:

Labour costs by region

Installation costs vary significantly across Australian cities. In general, the bigger the city (by population), the more expensive it tends to be.

City	Average labour cost (per window)
Sydney	$300 – $500
Melbourne	$280 – $450
Brisbane	$250 – $400
Perth	$260 – $420
Adelaide	$240 – $380

Note that the average hourly rate for window installers across Australia typically ranges from $50 to $80 per hour. Urgent or emergency repair costs may even be more expensive, reaching up to $150 per hour. You can look for local window repair professionals if you need an urgent window repair job.

While these rates apply to new window installations, you might also want to understand how much window repairs cost if you’re considering fixing existing windows before committing to double glazing.

Window size, material, and frame type

Larger windows naturally cost more due to increased material requirements. Custom sizes and shapes can add 20–30% to standard pricing. Frame material significantly impacts cost, with timber being the most expensive option but offering superior insulation and visual appeal.

For period properties with sash windows, compare window sash repair costs against full replacement, as restoration might be more cost-effective and preserve original features.

Type of glazing

The type of glass and gas fill used affects both performance and price:

• Standard double glazing: Often rates at a standard price. The most common type, standard double glazing, provides basic thermal and acoustic insulation suitable for moderate climates.
• Low-E glass: This type could add 15 to 20% to base price. This method employs a microscopic coating that reflects heat while allowing light to pass through, improving energy efficiency year-round.
• Triple glazing: Triple glazing incorporates three panes of glass for maximum insulation, ideal for homes in extreme temperature zones or high-noise areas. Because of it’s multiple panels and stronger frames, this type could add roughly 30-40% to the initial cost. 
• Argon gas fill: This glazing type uses dense, non-toxic argon between panes to reduce heat transfer compared to air-filled units significantly. Expect to pay extra 5–10% on top of your bill if you prefer to have this. 

Installation complexity

The overall double glazing cost can vary significantly based on installation factors. Find a local windows installer who understands your specific requirements, such as:

• New construction vs replacement
• Access difficulties
• Required modifications to existing frames
• Number of windows being installed
• Ground floor vs upper floor installation

While costs vary for double glazed windows, a quality window installation can slash your energy bills and keep your home comfortable for decades. On the other hand, a poor installation can lead to air leaks and moisture problems within months.

You’d know if an installer knows your local quirks if they discuss thermal ratings specific to your region and are certified by the Australian Glass and Window Association. A proper consultation involves a site visit and detailed discussion about your home’s specific challenges, whether that’s coastal salt spray or intense afternoon sun.

Before signing any contracts, ensure your installer provides:

• WERS (Window Energy Rating Scheme) certification details—aim for 6+ stars in most climates
• A detailed quote breaking down materials, labour, and any structural work needed
• Examples of similar installations they’ve completed, ideally some that are 3-5 years old
• Specific experience with your chosen frame material (timber, uPVC, or aluminium)
• Written warranty terms that cover both the windows and the installation work

Many installers are skilled with both windows and doors, offering comprehensive home improvement solutions. Talk to a local window and door installation expert who can handle both of your needs.

While the cost of double-glazing windows might seem steep at first, several strategies can reduce costs:

• Retrofit existing frames: Keep current frames and upgrade just the glass to save nearly half of the price versus a full replacement.
• Time installations strategically: Book during slow seasons (April–May or September–October) for roughly 10–15% savings through promotional discounts.
• Start with high-impact areas: In the southern hemisphere, begin with north-facing rooms that get the most sun exposure for immediate benefits.
• Bundle installations: Packaged whole-house upgrades reduce per-window costs, letting you save big if you’re doing a whole renovation.
• Plan for maintenance: Browse local window cleaning services to find professionals to clean double-glazed units, which require less frequent care than traditional windows.

Double-glazed windows of savings opportunity

Double-glazed windows have evolved from luxury items to essential home improvements offering significant long-term value. Whether upgrading a single room or your entire home, professional installation ensures you’ll maximise energy efficiency and comfort benefits.

Whether you’re looking to upgrade a single room or transform your entire home, the cost of double glazing is an investment that pays off through professional installation. It ensures you’ll enjoy the full benefits for years to come.

Connect with licensed double glazing specialists who can provide detailed quotes and help you choose the right windows for your specific needs.