Glass Box Extensions

Glass box Kitchen Extension

Glass Box Extensions

Our range of Glass Box Extensions are manufactured to exacting architectural specifications and are available with several choices of glass and frames which can be powder coated in over 600 colors of your choice.

A Glass Box Extension or a Glass Box Conservatory as they are often referred to, can provide a frameless structure with no metal supports maximizing light and design. Our Full range of G-span Structural Glass can be used giving you options such as heated glass and our laminated options reduce cleaning and maintenance.

Where your glass box extension connects to the main building care can be taken in the design and installation to create a minimalist clean connection ensuring emphasis is placed on the synergy between the existing building and the glass walls of the extension.

Heated Glass

Our Heated Glass Range can eliminate the need for other heat sources such as traditional radiators or even underfloor heating giving you the ability to maximize the your floor space and provide an ultra modern look.

Also available is our thermally efficient glass to enhance the energy effiency of your glass box extension and retain heat in the winter months and reduce your heating requirements.

Glass Box Doors

You choose from a range of door options to enhance your glass box extension and provide a seamless transition between your exterior and exterior.

Most clients choose our slimline sliding doors which can slide back to open up your extension to your garden or patio area.

Sliding Doors

Designing Your Glass Box Extension

First we will arrange to visit your property and present you with the glazing and frame options available. Then our structural glazing team can work closely with the architect to design a bespoke glass box extension for your property.

Our Tailored design process will allow you to choose every aspect of your new glazing structure to incorporate any features such as heated or low maintenance glass.

Then when you are happy with our design and quotation our team will finalize the plans and liaise with the architect and arrange an installation date. As all our glass box extensions are bespoke and made to order our lead time is usually around 4 weeks from order placement to the installation date.

Key Benefits

  • For retrofit or new build
  • Bespoke design
  • Fully installed


  • Choice of frame color
  • Choice of glass
  • Heated option