If you are researching the cost of double glazing in Melbourne, the honest answer is that it depends on the window, not on a single headline price. Two homes with the same number of windows can land at very different totals once you factor in opening sizes, glass specification, frame system, and how easy the site is to work on.
Most Melbourne suppliers quote per opening rather than per square metre, because every window has its own size, style, and installation requirements. Below you will find typical installed price ranges for uPVC double glazed windows and doors, a per-square-metre budgeting guide, and the main factors that move a quote up or down. Ultimate Windows manufactures Deceuninck uPVC systems in our own Wodonga factory and installs with in-house teams, so the pricing here reflects genuine supply-and-install work rather than supply-only figures.
A note on the numbers: all figures below are indicative installed ranges in Australian dollars for common residential replacement projects. Your final quote will vary with sizes, glass, access, and finishing scope, and your written quote should confirm inclusions, exclusions, and whether GST is included.
Double Glazed Window Prices in Melbourne (Installed, uPVC)
The table below shows typical installed price ranges by window type for standard residential openings. Fixed windows are the most economical because they have no moving parts, while sliding, awning, casement, and tilt & turn windows carry more hardware and so cost more. Larger multi-panel windows such as bay and bifold sit at the top of the range.
| Window Type | Approximate Size | Estimated Installed Price |
| Fixed / Picture Window | 1200 × 1200 mm | $1,700 – $2,500+ |
| Sliding Window | 900 × 1200 mm | $2,200 – $3,400+ |
| Awning Window | 900 × 1200 mm | $2,100 – $3,400+ |
| Casement Window | 900 × 1200 mm | $2,100 – $3,400+ |
| Tilt & Turn Window | 900 × 1200 mm | $2,000 – $3,300+ |
| Double Hung Window | 900 × 1400 mm | $2,300 – $3,600+ |
| Bay & Corner Window | 1800 × 1200 mm (3-panel) | $5,500 – $10,000+ |
| Bifold / Stacking Window | 2400 × 1200 mm (3-panel) | $5,500 – $9,000+ |
Prices are estimates based on typical Melbourne residential installations. Actual costs vary with glass specification, site access, and project requirements.
These installed prices generally include:
- uPVC multi-chamber Deceuninck frame system
- Double glazed insulated glass unit (IGU) with argon gas as standard
- Removal and disposal of your existing windows (recycled where possible)
- Installation into the existing opening
- Sealing and perimeter weatherproofing
- Basic internal finishing around the frame
They typically do not include: structural enlargement of openings, major brick or render repairs, scaffolding for difficult access, or custom architectural detailing. These are quoted separately after a site measure.
You may see supply-only prices advertised from around $800 per window. Those figures usually exclude removal, installation, disposal, reveals, and sealing, which is why a fully installed opening sits higher. We quote installed, all-in, so there are no surprises once the old windows come out.
Double Glazing Cost Per Square Metre in Melbourne
While most projects are quoted per opening, a per-square-metre figure is a useful way to sketch a whole-home budget before a site measure. For installed uPVC double glazing in Melbourne homes, realistic ranges are:
| Glass Specification | Estimated Installed Cost / m² |
| Standard Clear Double Glazing | $1,000 – $1,600 |
| Low-E Double Glazing | $1,150 – $1,800 |
| Acoustic Laminated Double Glazing | $1,300 – $2,000 |
| Triple Glazing | $1,600 – $2,500+ |
Square metre pricing is a general budgeting guide only. Final costs depend on window configuration, glass selection, and installation conditions.
One important caveat: smaller windows cost more per square metre than large ones. Measure, fabrication, hardware, and labour don’t scale down with the glass, so a small bathroom window works out at a higher rate per m² than a large living-room window. This is exactly why per-opening quoting is more accurate for most homes.
Double Glazed Door Prices in Melbourne (Installed, uPVC)
Doors generally cost more than windows because of their larger spans, heavier glass, and more complex operating hardware. Wider openings may also need additional reinforcement within the uPVC frame to stay rigid and operate smoothly over time.
| Door Type | Typical Size | Estimated Installed Range |
| Sliding / Patio Door (2-panel) | 2100 × 1800 mm | $3,800 – $7,500+ |
| Stacking Door (multi-panel) | 2400–4000 mm span | $7,000 – $14,000+ |
| French Door | Standard double opening | $4,500 – $8,500+ |
| Entrance Door | Standard single / double entry | $4,000 – $7,500+ |
| Bifold Door | Multi-panel (3–6 panels) | $9,500 – $18,000+ |
| Back / Laundry Door | Standard single opening | $3,500 – $6,000+ |
Door pricing reflects typical installed costs for standard residential openings. Larger spans, custom configurations, or complex access affect final pricing.
Windows vs Doors: Cost at a Glance
If you’re weighing up where your budget goes, this side-by-side shows why doors carry a higher price than a comparable window: bigger glass, heavier panels, and more demanding hardware.
| Factor | Double Glazed Windows | Double Glazed Doors |
| Typical installed range | $1,700 – $3,600 per opening | $3,500 – $18,000+ per opening |
| Glass area | Smaller panels | Large, heavier panels |
| Hardware complexity | Hinges, locks, rollers | Multi-point locks, tracks, heavy-duty rollers |
| Frame reinforcement | Standard steel reinforcement | Additional reinforcement for wide spans |
| Installation time | Lower | Higher (larger, heavier units) |
Whole-Home Double Glazing Cost Examples
To put the per-opening prices in context, here are typical project totals for full window replacement across common Melbourne home sizes. These assume standard access and like-for-like replacement without major structural changes.
| Home Size | Typical Scope | Estimated Budget Range |
| 3-Bedroom Home | 8–10 windows | $18,000 – $30,000 |
| 4-Bedroom Home | 12–15 windows + 1 sliding door | $30,000 – $48,000 |
| Larger / Architectural Home | 15+ windows + multiple doors | $45,000 – $85,000+ |
Melbourne homeowners may be able to reduce these totals through the Victorian Energy Upgrades (VEU) program, depending on the product and installation. Ask us how the current rebate applies to your project.
What Affects Double Glazing Cost the Most?
A quote is rarely driven by one thing. It reflects a mix of window size, style, glass performance, and site conditions. The biggest levers are:
Window Size, Span and Reinforcement
Larger openings need more glass, stronger steel reinforcement inside the uPVC frame, and heavier-duty hardware. Wide living-room windows, corner glazing, and bay windows carry extra engineering, so span matters as much as glass area.
Window or Door Style
Fixed units are cheapest because nothing moves. Sliding windows add tracks and rollers, awning and casement windows add hinges and compression seals, and tilt & turn windows add dual-action hardware and multi-point locking. Doors sit above all of these because of their size and weight.
Glass Performance
Glass is a major part of the total. Upgrades change the price as follows:
| Upgrade Type | Typical Cost Increase |
| Low-E coating | +10% to 20% |
| Acoustic laminated glass | +20% to 35% |
| Toughened safety glass | Project dependent |
| Increased pane thickness | Project dependent |
Low-E glazing suits Melbourne’s cooler winters, while acoustic laminated glass is worth specifying for homes near major roads, train lines, or busy suburban streets.
Installation Conditions and Access
Second-storey windows may need scaffolding, and narrow side access or steep blocks add labour time. Older Melbourne homes bring their own challenges: double brick, out-of-square openings, age-related movement, and rendered façades that need careful finishing.
Structural Changes and Compliance
Enlarging openings, replacing lintels, heritage overlay compliance, or body corporate approval for units can all move the final figure beyond a straight like-for-like replacement.
Double Glazing Cost FAQs
Why are some double glazing quotes much cheaper than others?
Large price gaps usually come down to glass specification, frame reinforcement, hardware quality, or installation scope. A cheaper quote may use thinner glass, simplified hardware, or exclude removal and finishing. Compare written specifications, not headline prices.
Does replacing only the glass reduce the cost?
It can look cheaper up front, but existing frames often can’t properly support a double glazed unit, so full window replacement usually delivers better insulation, sealing, and durability over the life of the window.
Is double glazing more expensive in older Melbourne homes?
Often, yes. Double brick construction, uneven openings, heritage overlays, and tight access all add labour and complexity compared with newer brick-veneer homes.
Can I get a rebate on double glazing in Melbourne?
Eligible Victorian homeowners may access discounts through the Victorian Energy Upgrades (VEU) program, depending on the product and installation. We can explain how the current rebate applies during your free measure and quote.
Does double glazing add value to my home?
Well-installed double glazing improves comfort, energy efficiency, and noise control, which can lift buyer appeal. Treat it as a long-term improvement rather than a short-term investment play, as resale impact varies by location and market.
Get a Fixed-Price Quote on Your Double Glazing
Every home is different, so the most accurate way to know your cost is a free on-site measure. We manufacture your uPVC windows and doors in our Wodonga factory and install with our own qualified teams, backed by an industry-leading 12-year guarantee. Claim your free measure and quote and we’ll give you a clear, itemised, fixed price with no hidden extras.
