Double Glazing Cost Melbourne: Prices and VEU Discount

Prices Published 12 September 2026 2 min read

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The short answer

Melbourne double glazing runs $2,300 to $3,500 per window↗ fully installed according to a local window company, or $1,200 to $1,800 per m²↗ for windows of 1.5 m² and up. Victorian homes with single-glazed windows↗ can claim up to $210 per 10 m²↗. Melbourne sits in climate zone 6↗, so summer and winter both matter.

What would eight windows cost?

Take a common Melbourne setup: six windows at 1200 × 1200 mm and two sliders at 2400 × 1200 mm. That is 14.4 m² of glass across eight openings, which is enough to see how the two pricing methods pull apart.

Eight windows, 14.4 m² of glazing

Official and industry figures. Source: Windows Republic (Melbourne uPVC window maker); Consumer Affairs Victoria; Building and Plumbing Commission (Victoria). Our arithmetic on published rates, rounded to the nearest hundred.

Show the numbers

Item	Range
Double glazed, by area	$17,300 to $25,900
Double glazed, by window	$18,400 to $28,000
Secondary glazing, by area	$4,300 to $9,400
Marker: Contract from $10,000	$10,000
Marker: Insurance from $16,000	$16,000

Both double glazing methods land in the same neighbourhood, which is reassuring. Secondary glazing on the same glass area comes out far lower, though it leaves the existing frames in place. The Victorian discount on 14.4 m² is about $302 at the full rate, worth having on a quote of this size without changing the decision.

Why does climate zone 6 matter here?

Melbourne is in climate zone 6↗, described as mild temperate, where the job is to cut cooling in summer without giving up winter warmth. That is why a single headline number is a poor way to choose glass here: ask for the WERS heating stars and cooling stars, which run 0 to 10 stars↗, rather than one figure. The code treats the zone the same way, with conductance limits across climate zones 2 to 8↗ and solar heat gain limits across climate zones 1 to 7↗.

What paperwork does a big window job need in Victoria?

Once the price passes the thresholds marked on the chart, the job stops being a simple order. Domestic building work of more than $10,000↗ needs a major domestic building contract, and only a registered building practitioner may enter one. Work valued at $16,000 or more↗ must carry domestic building insurance. The regulator also treats full replacement of building elements as treated as an alteration↗, so ask a registered building surveyor where your job sits before the first window comes out.

What is changing, and when?

Victorian dates worth knowing

Official dates. Source: NatHERS: Victoria and Queensland adopt NCC 2022; Victorian Energy Upgrades: insulation discounts; Energy Victoria: energy efficiency for rental properties.

Show the dates

Date	What happens
1 May 2024	New Victorian homes must reach 7 stars
12 September 2026	Today, when these figures were checked
1 October 2026	VEU insulation discounts open to more homes
1 July 2027	Rentals need draught proofing on windows

The 7-star rule applies to new homes rather than to replacing windows in an existing one. If you own a rental in Melbourne, the 2027 date is the one to diarise, and our renters and landlords guide covers what it asks for.

How do you get Melbourne quotes you can compare?

Give every company the same window schedule, with sizes and opening styles.
Ask for fully installed prices, including reveals, sealing and taking the old windows away.
Ask for the VEU discount on its own line, with the glazing area it was calculated from.
Ask for WERS heating and cooling stars for the product being quoted.

Sources

Victorian Energy Upgrades (energy.vic.gov.au): Victorian Energy Upgrades discount to double glaze windows. Checked 2026-09-12.
Victorian Energy Upgrades (energy.vic.gov.au): Victorian households and most businesses with single-glazed windows can receive the window glazing discount. Checked 2026-09-12.
Victorian Energy Upgrades: insulation discounts: Victorian Energy Upgrades insulation discount for eligible households from 1 October 2026. Checked 2026-09-12.
Energy Victoria: energy efficiency for rental properties: Victorian rental properties must have draught proofing on external doors, windows and unsealed wall vents from 1 July 2027. Checked 2026-09-12.
NatHERS: Victoria and Queensland adopt NCC 2022: Victoria adopted NCC 2022 energy efficiency, so new houses and apartments must meet a 7-star thermal rating and a Whole-of-Home rating. Checked 2026-09-12.
NCC 2022 Housing Provisions Part 13.3 External glazing: In climate zones 2 to 8, the conductance of glazing in each storey must not exceed the allowance from Housing Provisions Table 13.3.2a. Checked 2026-09-12.
NCC 2022 Housing Provisions Part 13.3 External glazing: In climate zones 1 to 7, the aggregate solar heat gain of glazing in each storey must not exceed an allowance based on the storey's floor area. Checked 2026-09-12.
YourHome (Australian Government): Melbourne is in climate zone 6, mild temperate, where designs balance reducing summer cooling with reducing winter heating. Checked 2026-09-12.
Window Energy Rating Scheme (Australian Glass and Window Association): WERS rates a window's heating and cooling performance separately on a scale of 0 to 10 stars, where more stars is better. Checked 2026-09-12.
Victorian Building Authority practice note EE 04: Full replacement of elements of a building does not constitute repair, renewal or maintenance and must be treated as an alteration. Checked 2026-09-12.
Consumer Affairs Victoria: Domestic building work costing more than $10,000 requires a major domestic building contract, which only a registered building practitioner may enter. Checked 2026-09-12.
Building and Plumbing Commission (Victoria): Domestic building work valued at $16,000 or more must be covered by domestic building insurance. Checked 2026-09-12.
Windows Republic (Melbourne uPVC window maker): A Melbourne window company reports double glazed windows cost this much per window, fully installed, in 2026. Checked 2026-09-12.
Windows Republic (Melbourne uPVC window maker): A Melbourne window company reports double glazing costs this much per square metre, fully installed, for windows of 1.5 m² and above. Checked 2026-09-12.
Windows Republic (Melbourne uPVC window maker): A Melbourne window company reports professionally installed secondary glazing systems generally run this much per square metre. Checked 2026-09-12.

Double glazing cost in Melbourne