Updated for 2026 — based on 10+ years of real installation experience across Melbourne.
If you are planning to replace windows in Melbourne, understanding the true cost of double glazed windows is essential. Prices vary widely depending on size, frame material, access, building type, and installation complexity.
This guide reveals real replacement costs, not theoretical estimates — so you can budget accurately and avoid surprises.
💰 Average Cost of Double Glazed Window Replacement in Melbourne
| Typical Window Size | Typical Replacement Cost | Notes |
|---|---|---|
| Openable + fixed 1800W × 2100H | $3,000 — $3,500 | Complete replacement including timber reveals, sealing, disposal, touch ups. |
| Openable + fixed 1800W × 1500H | $2,800 — $3,200 | Complete replacement including timber reveals, sealing, disposal, touch ups. |
| Openable 900W × 1000H | $2,300 — $2,500 | Complete replacement including timber reveals, sealing, disposal, touch ups. |
| Sliding Door 1800W × 2100H | $3,500 — $3,900 | Complete replacement including timber reveals, sealing, disposal, touch ups. |
Prices reflect full replacement installations in Melbourne homes.
🪟 Cost by Window Type
| Window Type | Typical Cost Range | Best For |
|---|---|---|
| Awning | $$ | Bathrooms, kitchens |
| Casement | $$ | Good ventilation |
| Tilt & Turn | $$ | Premium performance, airtightness and ventilation |
| Sliding | $ — $$ | Budget-friendly option |
📸 Recent Melbourne Installation Examples
🏗️ Frame Material Comparison (Thermal Performance)
| Frame Type | Typical U-Value | Pros | Cons |
|---|---|---|---|
| uPVC | 1.0 — 1.4 | Best insulation, low maintenance | Thicker frame |
| Timber | 1.4 — 1.8 | Natural look | Requires ongoing maintenance |
| Aluminium | 2.5 — 3.5 | Slimmer frames | Poor insulation unless thermally broken |
Lower U-value = better insulation.
🏠 Replacement Complexity by Building Type
Start
↓
Brick Veneer Home?
├─ Yes → Usually cheaper replacement
└─ No
↓
Double Brick Home?
├─ Yes → Best performance outcome
└─ No
↓
Steel Windows Present?
├─ Yes → Most complex & expensive
└─ Standard replacement
📊 Factors That Affect Price
- Number of windows (bulk discounts apply)
- Access and installation difficulty
- Existing frame type (steel is hardest)
- Building construction
- Frame colour choices
- Glass specification (noise reduction, safety, tint)
🔊 Upgrade Options That Affect Cost
Many Melbourne homeowners choose upgrades for performance:
- Noise reduction glazing
- Triple glazing
- Security laminated glass
- Low-E energy coatings
People Also Ask — Double Glazed Window Costs in Melbourne
How much does it cost to double glaze a house in Melbourne?
Replacing all windows in a typical Melbourne home usually costs between $15,000 and $40,000+ depending on window count, sizes, frame material, and installation complexity.
Are double glazed windows worth it in Melbourne?
Yes. Double glazing significantly improves thermal comfort, reduces outside noise, lowers energy bills, and increases property value — particularly important in Melbourne’s variable climate.
Why are double glazed windows so expensive?
The cost reflects specialised manufacturing (made to order), insulated glass units, professional installation, premium European hardware, and finishing work required for full replacements.
What is the cheapest type of double glazed window?
Fixed windows are the most affordable because they do not require opening hardware or complex mechanisms.
Do double glazed windows reduce noise?
Yes. Properly installed double glazing can reduce outside noise by 50–80%, depending on glass thickness and sealing quality.
How long do double glazed windows last?
High-quality systems typically last 20–35 years with minimal maintenance.
Do I need council approval to replace windows in Melbourne?
Most standard replacements do not require permits unless structural changes or heritage overlays apply.
Which frame is best for double glazing in Australia?
uPVC frames offer the best insulation and energy efficiency, followed by timber and thermally broken aluminium.
Is triple glazing worth the extra cost?
Triple glazing provides superior insulation and noise reduction but is usually recommended for high-noise locations or premium homes.
Can double glazing be installed in older homes?
Yes. Most Melbourne homes — including brick veneer, double brick, and weatherboard — can be upgraded with replacement windows.
Extended FAQ — Melbourne Double Glazing Costs
Do window colours affect price?
Yes. Custom colours and dual-colour frames typically cost more than standard white.
Are sliding doors more expensive than windows?
Yes. Larger glass areas, heavier frames, and track systems increase cost.
What adds the most to installation cost?
Access difficulty, steel frames, and high-performance glass upgrades.
Do double brick homes perform better?
Yes. Deep wall cavities allow optimal sealing and insulation performance.
How long does installation take?
Most homes can be completed in 2–5 days depending on project size.
Will double glazing increase property value?
Yes. Energy-efficient upgrades are highly desirable to buyers.
Can you replace windows one at a time?
Yes, but replacing multiple windows together reduces cost per unit.
What is the best glass for noise reduction?
Acoustic laminated glass with different pane thicknesses performs best.
Do double glazed windows stop condensation?
They significantly reduce condensation by improving thermal performance.
Are uPVC windows cheaper long-term?
Yes. They require minimal maintenance and reduce heating/cooling costs.
