Double glazing is one of the highest-impact upgrades a Perth homeowner can make, but upfront cost is the thing that trips most people up. This price guide shows what quality double glazed windows actually cost in Perth in 2026, how each factor influences cost, and how to get an accurate quote without walking into hidden fees.
Everything below is based on current Perth market pricing for supplied and installed double glazing, with detailed pricing for the most common window styles in a standard Perth home.
Key Takeaways
Quality double glazed windows in Perth typically cost between $300 and $500 per square meter at the base price, climbing to $1,250 per square meter for premium aluminium or timber systems.
For a standard Perth 4×2 home, upgrading from single glazing to double glazing costs roughly $4,000 to $5,000 more overall, with total installed double glazed windows cost usually landing between $12,000 and $14,000.
Frame material, glass type, frame colour and window styles drive most of the variation. uPVC frames remain the best energy efficiency to cost ratio for Perth conditions.
Energy savings from double glazing typically cut heating and cooling bills by 25 to 40 per cent, producing long term benefits that recover the upfront cost over the life of the windows.
How Much Do Double Glazed Windows Cost in Perth?
Most Perth homeowners see a base price of $300 to $500 per square meter for quality double glazed windows with uPVC frames. Aluminium double glazing sits higher, commonly $750 to $1,250 per square meter installed, while timber frames can reach $1,500 per square meter.
On a per-window basis, installed double glazed windows in Perth fall into the following ranges:
Perth 2026 Pricing Table — Common Window Styles
Sliding windows (1200mm × 1200mm): $1,200 to $2,100 installed. Sliding windows are one of the most common window styles in Perth because they suit both older brick homes and modern builds.
Awning windows (900mm × 600mm): $800 to $1,500 installed. Awning windows are popular in bathrooms, kitchens and above benches where ventilation matters.
Casement windows (900mm × 1200mm): $850 to $1,800 installed. Casement windows deliver the tightest seal of any opening style, which matters for thermal and acoustic performance.
Tilt-turn windows (900mm × 1200mm): $1,400 to $2,300 installed. Tilt-turn is the European standard and pairs well with uPVC frames for maximum energy efficiency.
Fixed windows (1500mm × 1500mm): $1,300 to $2,400 installed. Fixed picture windows give the lowest cost per square meter because there is no operating hardware.
Double glazed doors: sliding doors from $3,200 to $5,200, lift-and-slide systems from $6,500 to $10,500, French doors from $2,800 to $4,500 for a standard pair.
Whole-Home Double Glazing Cost Estimates
Typical Perth whole-home costs for installed double glazing, based on 2026 pricing:
3×2 home (roughly 20 to 25 square metres of glazing): $20,000 to $25,000 for a complete double glazing package.
4×2 Perth home (roughly 30 to 35 square metres of glazing): single glazed aluminium windows cost $7,000 to $9,000 installed, while double glazed windows for the same home run $12,000 to $14,000. That is about a $4,000 to $5,000 extra cost for double glazing across a typical Perth family home.
Larger 5×2 or two-storey homes: $30,000 to $40,000+ depending on door systems, glass specification and installation complexity.
What Influences Cost in Double Glazing?
Four variables drive almost all of the price variation you will see between quotes. Understanding each one helps you read a quote properly and spot hidden fees before you sign.
Frame Material
Frame material is the single biggest lever on upfront cost. uPVC frames are the most economical at $300 to $500 per square meter and give the best energy efficiency to cost ratio. Aluminium frames run $300 to $1,250 per square meter, while timber frames sit between $600 and $1,500 per square meter. Thermally broken aluminium costs more than standard aluminium but recovers the extra cost through better thermal performance.
For Perth conditions, uPVC windows are the go-to choice for most homeowners because uPVC frames do not conduct heat, they need zero repainting, and they handle Perth summers without warping. Timber frames suit heritage properties but require ongoing maintenance.
Glass Type
Standard float glass is the baseline. Toughened glass adds roughly $50 per square meter. Low e glass adds around $100 per square meter and reflects solar heat, which is the single most valuable glass upgrade for a Perth west or north facing elevation. Acoustic glass adds $80 to $150 per square meter and is worth the extra cost near main roads, the freeway, or under a flight path.
Argon gas fill between the two panes adds $50 to $80 per window and improves thermal efficiency by around 15 per cent. Glass thickness also affects pricing; thicker glass improves acoustic performance compared to standard 4mm float, but increases weight and hardware costs.
Frame Colour
White frames are the cheapest finish. Colour upgrades and dual colour frames add $150 to $400 per window. Timber-look woodgrain finishes on uPVC frames add about 10 per cent across the order. Colorbond-matched aluminium is typically $200 to $500 extra per window.
Window Configuration
Multi-opener windows cost more than single-opener designs because every extra sash means extra hardware, seals and labour. A three-panel sliding window costs roughly 40 per cent more than a two-panel unit of the same overall size. Large single panes are cheaper per square meter than small divided-light designs because glass is priced by sheet economy.
Cost by Frame Material: uPVC, Aluminium and Timber Compared
The quick comparison for Perth buyers looking at the main options for quality double glazing:
uPVC frames — $300 to $500 per square meter, zero maintenance, best thermal performance, available in white or woodgrain. Our preferred option for the Perth climate.
Aluminium frames — $750 to $1,500 per square meter installed. Slim sightlines and strong structural integrity. Thermally broken aluminium is mandatory for any serious thermal efficiency outcome.
Timber frames — $900 to $2,000 per square meter installed. Premium look, strong property value on heritage homes, but requires repainting every 4 to 7 years.
For most Perth homeowners balancing performance and upfront cost, uPVC windows remain the best value in 2026.
Glass Specification and What It Adds to Cost
Glass specification is where a cheap quote gets you burned. A $300 per square meter quote on plain 4mm float glass is not the same product as $500 per square meter with Low e glass and argon fill, even though both are called “double glazed windows.” The second specification will outperform the first on every measure that matters in Perth.
Low E Glass
Low e glass has a microscopic metallic coating that reflects radiant heat. In Perth summers, Low e glass on west-facing windows can reduce heat gain by up to 70 per cent compared with standard double glazed units. It is the single best glass upgrade for cooling costs.
Acoustic Glass
Acoustic glass uses laminated layers to block noise. Combined with double glazing, it delivers the thermal and acoustic performance needed for homes near Tonkin Highway, the airport flight path, or main arterial roads. Expect a 35 to 45 decibel reduction on road noise.
Toughened and Safety Glass
Toughened glass is required for doors, full-height windows and any glass within 300mm of the floor under Australian standards. It adds around $50 per square meter but is non-negotiable for compliance.
Installation Costs and Why They Matter
Installation costs typically run 20 to 30 per cent of the total project cost. Glazier rates in Perth sit between $70 and $95 per hour per installer, and most windows are installed in teams of two. Expect $150 to $300 in labour per window on a straightforward replacement.
Installation complexity is the other variable. Replacing into existing window frames in a timber-framed older home is usually straightforward. Replacing into brick-veneer construction often requires structural modifications around the reveal. Second-storey windows, curved openings, and heritage-compliant installations all add cost.
Proper sealing around the frame is what separates a quality install from a leaky one. Any reputable installer will use expanding foam for structural insulation plus a silicone weather seal externally. Cheap installers skip the foam, which causes draughts and condensation years later.
Double Glazing Versus Single Glazing: Is Double Glazing Worth It?
For a Perth 4×2 home, the extra cost of double glazing over single glazing is roughly $4,000 to $5,000. That sounds like a lot, but the payback comes from three sources:
Energy bills. Double glazing cuts heating and cooling energy consumption by 25 to 40 per cent in Perth’s climate, saving $350 to $600 per year on a typical household.
Property value. Double glazed homes in Perth typically sell for 5 to 10 per cent more than equivalent single glazed properties, and they sell faster.
Comfort. The internal pane of a standard double glazing unit stays within 2 degrees of room temperature, compared with 8 to 12 degrees difference on single glazing. The cooling bills savings are real, but the comfort difference is what Perth owners consistently say is the biggest post-install surprise.
Standard double glazing is five times more energy efficient than single glazing on a thermal basis. That number is not marketing; it is the difference in U-value between a 4mm single glazed window and a quality double glazed unit with Low e glass.
Retrofitting Double Glazing to Existing Windows
You have two paths for existing windows: retrofit new double glazed units into existing window frames, or replace the complete window (frame and all).
Retrofit Double Glazed Units
If the existing frames are aluminium and in sound condition, retrofitting new double glazed units (IGUs) into the existing frames costs $800 to $1,800 per window. This is the cheaper path but works best only on aluminium frames deep enough to take a double glazed unit.
Secondary Glazing
Secondary glazing adds a second pane on the internal side of existing single glazed windows. It delivers most of the thermal and acoustic benefits of full double glazing at roughly 40 per cent of the cost. Secondary glazing is particularly useful for heritage homes where changing the original windows is restricted.
Full Window Replacement
Full replacement of the existing windows with new double glazed units gives the best long term value. It delivers better thermal efficiency, removes aging hardware, and avoids the risk of failure inside old frames. Full replacement is our recommendation for any window over 20 years old.
How to Get an Accurate Quote for Double Glazing in Perth
Getting an accurate quote is about comparing like-for-like. Three quotes from different Perth double glazing suppliers can vary by $10,000 on the same job if the glass specification and frame material are not locked down. Use this checklist before you sign anything.
What to Ask Before You Buy
Ask the installer to specify glass type (float, toughened, Low e, acoustic), frame material (uPVC, aluminium, timber), frame colour, opening configuration (fixed, awning, casement, sliding, tilt-turn), and whether the price includes removal of old windows and disposal.
Confirm whether installation includes architraves, reveals, and internal finishing. Many cheap quotes leave these to the homeowner.
Ask about the manufacturer’s warranty on the frames, the IGU (insulated glass unit) warranty, and the installation warranty. A quality supplier should offer at least a 10-year manufacturer guarantee on frames and IGU seal integrity.
Hidden Fees to Watch For
Site access charges, second-storey surcharges, heritage compliance fees, removal and disposal fees, and GST are all common line items that inflate the final invoice. A good installer includes them in the quoted base price.
Payment and Financing
Most Perth double glazing suppliers now offer interest free payment plans over 12 to 24 months. This spreads the upfront cost without inflating the total. Avoid anyone who quotes “interest free” but bundles a finance charge into the base price.
Long Term Benefits and Payback
Double glazing is a 25 to 30 year product. Over the life of a quality double glazed window, Perth homeowners can expect:
Energy savings of $350 to $600 per year on heating and cooling costs. Over 15 years, that is $5,000 to $9,000 back in your pocket just from reduced energy consumption.
Reduced cooling costs are particularly valuable in Perth because air conditioning represents the bulk of energy use from November to March.
Property value uplift of 5 to 10 per cent at sale, which on a $750,000 Perth home is $37,500 to $75,000 recovered at resale.
Structural integrity of frames. uPVC frames carry 30-year structural warranties in most cases and do not corrode, warp or rot.
Local Perth Climate Considerations
Perth is a unique climate market. Summer maximums push 40 degrees for weeks at a time, winters are mild but damp, and the Fremantle Doctor drives significant wind loads on coastal homes. Three Perth-specific priorities:
Solar heat gain on west and north elevations is the biggest thermal load in a Perth home. Low e glass or tinted double glazing should be specified on those elevations as a minimum.
Salt-air corrosion is a factor within 5 km of the coast. uPVC frames and marine-grade aluminium outperform standard aluminium in Fremantle, Scarborough, Cottesloe and Hillarys.
Bushfire compliance is required for homes in designated BAL zones. Double glazing with appropriate glass specification can satisfy BAL-12.5 through BAL-29 requirements without further upgrade.
Frequently Asked Questions
How much do double glazed windows cost per square meter in Perth?
Quality double glazed windows in Perth cost $300 to $500 per square meter with uPVC frames, $750 to $1,250 per square meter with aluminium frames, and $900 to $1,500 per square meter with timber frames. These are base prices for standard double glazing with clear float glass.
Is double glazing worth it in Perth?
Yes for most Perth homeowners. Double glazing cuts cooling bills by 25 to 40 per cent, adds 5 to 10 per cent to property value, and eliminates the 8 to 12 degree temperature swing that happens on single glazed windows during summer.
Can you double glaze existing single glazed windows?
Yes, using secondary glazing or by retrofitting new double glazed units into suitable existing frames. Secondary glazing delivers most of the benefit at lower cost, while full replacement of the existing windows gives the best long term value.
How long do double glazed windows last?
Quality double glazed windows with uPVC or thermally broken aluminium frames last 25 to 30+ years. The IGU (insulated glass unit) seal carries a typical 10-year manufacturer guarantee against fogging, and the frame itself will outlast the seal.
What is the cheapest type of double glazing?
Standard double glazing with white uPVC frames and clear float glass is the cheapest option, starting around $300 per square meter. Choosing white frames over dual colour frames or woodgrain cuts frame colour cost. Choosing fixed windows over multi-opener styles cuts hardware cost.
Does double glazing reduce noise?
Standard double glazing cuts road and aircraft noise by 20 to 30 decibels. Upgrading to acoustic glass with laminated panes of different thickness increases noise reduction to 35 to 45 decibels, which is enough to make a bedroom near a busy road feel quiet.
How much does installing double glazing add to my home’s value?
Perth real estate data suggests a 5 to 10 per cent property value uplift for homes with full double glazing versus equivalent single glazed properties. The uplift is highest in energy-conscious suburbs and on homes in the $600,000 to $1.2M bracket.
Are there hidden fees in double glazing quotes?
Common hidden fees include site access charges, second-storey surcharges, disposal of old windows, architraves and reveals, and GST. Ask for an all-inclusive quote to avoid surprises.
Get a Detailed Pricing Quote for Your Perth Home
The numbers in this price guide give you a realistic budget for double glazed windows in Perth in 2026, but every home is different. The most accurate quote comes from a site measure where the installer can assess existing frames, structural integrity, opening configurations, and the specific glass specification your elevations need.
Canon Double Glazing manufactures premium uPVC windows and doors in Perth with a 10-year manufacturer guarantee on frames and insulated glass units. Every quote includes full glass specification, frame colour selection, installation, and disposal of old windows, with no hidden fees and interest free payment plans available.
Book a free measure and quote to see what quality double glazing will cost for your home.
