Secondary Glazing Cost Calculator
Estimate the cost of secondary glazing, an additional pane fitted inside your existing window, popular for noise reduction and heritage homes where you cannot replace the original windows. Enter the number of windows.
Your secondary glazing details
Your estimate sits within the typical range.
For noise, a larger air gap between the original and secondary pane matters more than for thermal insulation, which is why acoustic secondary glazing uses a wider cavity. It is very effective against traffic and aircraft noise.
Magnetic or removable acrylic secondary panels are the cheapest and are DIY-friendly, good for renters or a budget. Fixed or sliding glass panels look better and perform best but cost more.
Secondary glazing keeps your existing windows and adds an internal pane, ideal for heritage homes and renters who cannot replace windows. It is especially effective for noise, often more than double glazing for sound.
💰 Ways to save
- Magnetic or acrylic secondary panels are a cheap, renter-friendly, often DIY option.
- Treat the noisiest or coldest windows first if budget is limited.
- For heritage homes, secondary glazing keeps the original windows intact while improving comfort.
or from $18/week over 5 years , indicative finance
How we estimate this
Secondary glazing in Australia typically costs around $400 to $800 per window in 2026 for fixed or sliding glass panels, less for magnetic or acrylic panels. A whole house of 8 to 12 windows often runs $4,000 to $12,000.
Pricing reviewed: November 2026.
Pricing reviewed November 2026. Indicative Australian costs, not a quote.
Understanding secondary glazing costs in Australia
Secondary glazing in Australia typically costs around $400 to $800 per window in 2026 for fixed or sliding glass panels, less for magnetic or acrylic panels. A whole house of 8 to 12 windows often runs $4,000 to $12,000.
It adds an internal pane to your existing window rather than replacing it, keeping original frames, which suits heritage homes and renters. It is particularly effective for noise, where a wide air gap outperforms standard double glazing.
Frequently asked questions
How much does secondary glazing cost in Australia?
Roughly $400 to $800 per window in 2026 for glass panels, less for magnetic or acrylic. A whole house of 8 to 12 windows is often $4,000 to $12,000.
Is secondary glazing good for noise?
Yes, it is often more effective than double glazing for sound, because the wide air gap between the existing and secondary pane dampens noise well. It suits homes near traffic, trains or flight paths.
Are you a glazing / window business?
Everyone on this page is working out what secondary glazing costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.