With energy bills climbing and Perth homeowners increasingly focused on sustainable living, double glazed windows have become one of the most sought-after home improvements in Western Australia. Whether you’re building new or renovating, understanding the true cost of double glazing helps you make informed decisions that balance upfront investment with long-term savings. In this comprehensive guide, we’ll break down exactly what double glazed windows cost in Perth, the factors that influence pricing, and why this upgrade delivers exceptional value for your home and wallet.
How Much Do Double Glazed Windows Cost in Perth?
The cost of double glazed windows in Perth varies considerably based on window type, size, frame material, and glass specifications. In 2025, Perth homeowners can expect to invest anywhere from $800 for a basic small window to over $5,000 for premium large-format doors with advanced glazing technology.
Perth 2025 Pricing Table for Windows and Doors
| Window/Door Type | Typical Size | Price Range (Installed) |
|---|---|---|
| Sliding Window | 1200mm x 1200mm | $1,200 – $2,100 |
| Awning Window | 900mm x 600mm | $800 – $1,400 |
| Casement Window | 900mm x 1200mm | $1,100 – $1,800 |
| Tilt-Turn Window | 900mm x 1200mm | $1,400 – $2,300 |
| Fixed Window | 1500mm x 1500mm | $1,300 – $2,400 |
| Entry Door | 2100mm x 920mm | $2,800 – $4,500 |
| Sliding Door (2-panel) | 2100mm x 1800mm | $3,200 – $5,200 |
| Lift & Slide Door (3-panel) | 2400mm x 2700mm | $6,500 – $10,500 |
Pricing includes standard Low-E double glazing, uPVC frames in white, and professional installation. Premium finishes, acoustic glass, or thermally broken aluminium frames will increase costs by 15-40%. All prices are GST-inclusive estimates and may vary based on site conditions and customisation.
Cost Per Square Meter in Perth
When budgeting for a whole-home installation, double glazed window costs in Perth can vary significantly depending on system quality and specifications. For premium thermally broken aluminium double glazing, costs are typically around $1,000 per square metre for a standard configuration, with pricing increasing for larger panels, acoustic glass, or custom architectural designs.
As a guide, a standard 3-bedroom, 2-bathroom home (3×2) with approximately 20–25 square metres of glazing may expect a total investment in the order of $20,000 to $25,000. Larger 4×2 homes with 30–35 square metres of windows and doors can range from $30,000 to $35,000+, depending on door systems, glass performance, and installation complexity.
While lower price points are often associated with uPVC or entry-level systems, high-performance aluminium double glazing offers superior durability, thermal stability, and long-term value, particularly for Perth’s climate and noise-exposed suburbs.
What Impacts the Cost of Double Glazing in Perth?
Understanding the variables that influence Perth double glazing prices helps you budget accurately and make choices aligned with your priorities. Let’s explore the main cost drivers.
Type of Window or Door
The operating mechanism and complexity of your windows significantly affect pricing. Sliding windows are typically the most economical option, offering simple operation and reliable performance at competitive prices. Awning windows sit in a similar price bracket, perfect for ventilation in Perth’s climate. Casement windows cost slightly more due to their hardware requirements, while tilt-turn windows command premium pricing thanks to their dual-operation capability and superior sealing. Large-format options like lift-and-slide doors represent the highest investment but create stunning indoor-outdoor connections ideal for Perth’s lifestyle.
Glass Type & Efficiency
The glass package inside your double glazed unit dramatically influences both cost and performance. Standard Low-E (low-emissivity) glass includes a microscopic coating that reflects heat while allowing light through, this is the sweet spot for most Perth homes, offering excellent thermal performance without breaking the budget. Acoustic laminated glass adds 20-30% to costs but provides superior noise reduction, ideal for homes near busy roads or flight paths. Toughened or tempered glass, required in certain locations for safety compliance, adds approximately 15% to glass costs. For Perth’s climate, we strongly recommend Low-E as the minimum specification; the modest upfront premium pays for itself through reduced cooling costs within 3-5 years. Learn more about energy efficiency and how the right glass choice impacts your comfort.
Frame Material and Finish
Frame choice significantly influences cost and performance. The two most common high-performance options in Perth are:
uPVC Frames – uPVC is often chosen for its lower upfront cost and good thermal performance. It’s resistant to coastal corrosion, requires very little maintenance, and never needs repainting. However, its bulkier profile limits design flexibility, and its structural strength can’t match aluminium for large spans or architectural openings.
Thermally Broken Aluminium Frames – The premium choice for modern Perth homes. Thermally broken aluminium incorporates a non-conductive barrier between the inner and outer frame, significantly reducing heat transfer and helping minimise condensation. Beyond energy performance, aluminium offers far superior strength, making it ideal for wide openings, tall windows, and contemporary designs where slim sightlines matter. While generally 25–35% more expensive than uPVC, aluminium delivers a higher-end aesthetic, longer lifespan, and greater design freedom, aligning perfectly with the needs of luxury builds and renovation projects across Perth’s premium suburbs.
Colour choice also influences cost. Standard powder-coat finishes (white, black, grey) are the most economical. Upgrades such as COLORBOND® colours, timber-look finishes, textured coatings, or anodised aluminium typically add $150–$400 per window, depending on complexity. Dual-colour frames, where the interior and exterior have different finishes, carry an additional 10–15% premium but provide the flexibility designers and architects often seek.
Installation Quality & Labour
Professional installation isn’t just recommended, it’s essential for achieving the thermal and acoustic performance you’re paying for. Perth double glazing installation costs typically represent 20-30% of your total project price, but cutting corners here undermines your entire investment. Expert installers ensure proper sealing, correct shimming for structural integrity, and optimal alignment for smooth operation. Poor installation leads to air leakage, condensation problems, and premature hardware failure. When comparing quotes, verify that installation is included and performed by certified technicians. Learn about our installation process and why expertise matters.
Double Glazing vs. Single Glazing: Is It Worth It?
Perth homeowners often weigh whether the additional investment in double glazing justifies the cost difference from standard single-glazed windows. Let’s examine the numbers.
Cost Comparison
Single glazed windows with aluminium frames typically cost $400-$800 per window installed, while equivalent double glazed windows range from $800-$1,800. For a 3×2 house, single glazing might cost $8,000-$12,000 total, compared to $15,000-$22,000 for quality double glazing, a difference of approximately $7,000-$10,000. However, this analysis ignores operating costs. Double glazing reduces cooling and heating energy consumption by 25-30% in Perth’s climate, translating to annual savings of $350-$600 depending on your home’s size and cooling habits. This means the additional investment pays for itself within 12-18 years, and windows last 25-30+ years, delivering significant net savings over their lifetime.
Long-Term Value & Resale
Beyond energy savings, double glazing enhances property value. Perth real estate agents report that energy-efficient homes command premium prices, with quality double glazing delivering 70%+ return on investment at resale. In competitive suburbs like Cottesloe, Claremont, and Applecross, double glazing has shifted from luxury to expectation among buyers. The comfort factor also matters, homes maintain stable temperatures year-round, reducing temperature swings by up to 5°C and eliminating cold draughts in winter. This translates to genuine lifestyle improvement that residents notice daily. Discover more about achieving higher resale value through smart upgrades.
Comfort and Security
Double glazing delivers benefits beyond dollars and cents. The sealed cavity between glass panes reduces external noise by 30-40 decibels, transforming homes near busy roads or under flight paths into peaceful retreats. The robust construction and multi-point locking systems standard on quality double glazed windows significantly improve home security, two panes of glass are exponentially harder to breach than one. Combined with toughened glass options, your home becomes demonstrably more secure against break-ins. Learn more about security features in modern double glazing.
How to Get an Accurate Quote for Your Home
Perth double glazing prices vary substantially between suppliers, making informed comparison essential.
What to Ask Before You Buy
When requesting window replacement Perth quotes, ensure you’re comparing like with like by asking:
- Is professional installation included in the quoted price? Some companies quote supply-only prices that seem attractive until installation costs emerge later.
- What warranty terms apply? Quality suppliers offer 10+ year warranties on frames, 5+ years on seals, and lifetime glass breakage warranties.
- What glass specification and energy rating does this include? Confirm whether Low-E coating, argon gas fill, and the glass thickness (typically 4mm-6mm per pane).
- What frame material and finish? Verify whether standard colours or custom finishes apply, and understand maintenance requirements.
- Are there site-specific considerations? Multi-storey homes, difficult access, or structural modifications may incur additional costs.
Tools to Estimate Your Costs
Getting accurate pricing for your specific project is straightforward. Use our embedded quote calculator to receive a preliminary estimate based on your window count, sizes, and preferred specifications. For detailed pricing that accounts for your home’s unique characteristics, book a free in-home consultation where our specialists measure precisely and discuss options suited to your needs and budget.
Can Repairs or Replacements Impact Double Glazing Costs?
If you’re retrofitting double glazing to an existing home, the condition of your current window frames and openings affects project costs. Deteriorated timber frames, non-standard opening sizes, or structural modifications required to accommodate modern windows can add $200-$800 per opening. However, this investment in proper preparation ensures decades of reliable performance. We recommend a thorough inspection before finalising your quote, our team identifies any remedial work needed upfront, eliminating surprise costs during installation. In some cases, window openings may need enlarging to meet current building codes for emergency egress, or lintels might require upgrading to support heavier double glazed units.
Special Considerations for Perth Homes
Perth’s unique environment creates specific requirements for double glazing success.
Local Climate Considerations
Perth experiences intense UV exposure, coastal salt air in some suburbs, and temperature fluctuations between hot summer days and cool winter nights. These conditions demand carefully selected materials. Low-E glass is essential, it reflects summer heat while retaining winter warmth, optimising performance for Perth’s Mediterranean climate.
Australian Compliance & Testing Standards
All double glazed windows sold in Western Australia must comply with AS2047 (window performance standards) and AS1288 (glass selection and installation standards). These standards ensure your windows withstand Perth’s weather conditions, including cyclonic winds in some coastal areas. Compliance with these standards means your windows have been tested for water penetration, structural adequacy, and operating force. Additionally, energy ratings follow the Window Energy Rating Scheme (WERS), providing objective performance data. When comparing suppliers, verify their products carry current certification, this protects your investment and ensures building code compliance. Quality manufacturers provide documentation proving their products meet or exceed these Australian standards.
Why Choose Penot for Double Glazing in Perth?
When investing thousands in window replacement Perth projects, choosing the right partner matters enormously. We manufacture our double glazing right here in Perth, ensuring quality control and quick turnaround times without interstate shipping delays. Our certified installers undergo continuous training, and every installation carries comprehensive warranties covering both product and workmanship. We believe in transparent pricing with no hidden fees, your quote reflects the complete cost including installation, disposal of old windows, and any necessary site preparation. Visit our showroom to see and operate different window styles firsthand, discuss your project with experienced consultants, and view real product samples to understand quality differences.
Book your free consultation today and receive a no-obligation quote tailored to your home’s layout and energy goals.
Areas We Serve in Perth
We proudly serve Perth’s most desirable suburbs, delivering expert double glazed windows in Nedlands, Cottesloe, Claremont, Applecross, South Perth, Mosman Park, Subiaco, Dalkeith, Peppermint Grove, Mount Pleasant, Como, and throughout the western suburbs. Our local knowledge means we understand the specific challenges your suburb presents, whether coastal corrosion, aircraft noise, or extreme summer heat, and recommend solutions proven effective in your area.
Frequently Asked Questions (FAQs)
Are double glazed windows worth it in Perth?
Absolutely. Perth’s climate creates ideal conditions for double glazing benefits, significant cooling cost reductions in summer, improved winter comfort, and year-round noise reduction. With energy savings of 25-30% and property value increases of 70%+ ROI, double glazing represents one of the smartest home improvement investments Perth homeowners can make.
How much do double glazed windows cost in WA?
In Western Australia, double glazed window costs range from $800 for small awning windows to $5,000+ for large-format sliding doors. Complete home installations typically cost $15,000-$30,000 depending on home size and specifications. Perth prices align closely with broader WA market rates, with some regional variation for remote installations.
Can you retrofit double glazing to existing windows?
True retrofitting, adding a second pane to existing single glazed windows, is rarely viable or recommended. Instead, most “retrofits” involve complete window replacement with new double glazed units fitted to existing openings. This approach delivers superior performance and typically requires minimal structural modification. Secondary glazing (magnetic or fixed panels added to existing windows) offers a budget alternative but provides inferior thermal and acoustic performance compared to purpose-built double glazing.
How long do double glazed windows last?
Quality double glazed windows last 25-30 years or more with minimal maintenance. The sealed glass units themselves typically carry 10-20 year warranties against seal failure, while uPVC and aluminium frames last indefinitely when properly maintained. Hardware may require replacement or adjustment over this timeframe, but frames and glass commonly outlive these timelines when sourced from reputable manufacturers.
Is uPVC better than aluminium for double glazing?
Both materials have their place, but thermally broken aluminium is the superior choice for high-performance, long-lasting window systems in Perth’s climate. While uPVC can offer a lower upfront cost, aluminium provides far greater structural strength, slimmer and more refined sightlines, and the design flexibility needed for large openings and architecturally designed homes. It also performs exceptionally well in WA’s heat, delivering stable performance without warping or fading over time.
Ready to transform your Perth home with energy-efficient double glazing? Contact us today for your free consultation and discover exactly how much you could save on energy bills while increasing your property value and comfort.
