Double Glazing Cost Calculator

Disclaimer: This calculator is for planning purposes only and pricing may vary based on your home's specific requirements. Contact RetroFit Double Glaze for a no-obligation quote tailored to your home.

How to use this calculator: Double glazing is priced per pane, not per window unit. Select your window type, enter the measurements, and choose the number of panes. For example, the window configuration below contains 4 panes: 2 fixed and 2 casement.

Please complete all required fields before continuing.

What type of window frames do you have?

TimberWooden frames

AluminiumMetal frames

OtheruPVC, composite, etc.

Please select your frame type.

⚠️ Sorry, we can only retrofit timber windows. Our double glazing retrofit service is designed specifically for timber window frames. Aluminium and other frame types are not compatible with our system. Please contact us to discuss your options.

Select Glass Type

Economy ThermoTech™$285 per sqm

LightBridge/Optitherm™$395 per sqm

Lightbridge Next/Optitherm Hush$455 per sqm

Ultimate Performance VIG$895 per sqm

Please select a glass type.

Select Product

Window Any window style

Door Any door style

Please select a product.

As every home is unique, we're unable to provide an online cost estimate for custom windows. Please request a free measure and quote and one of our double glazing specialists will visit your home to provide a no-obligation quote.

Free Measure & Quote