Glass Box Extensions

Glass Box Extensions & Frameless Glass Rooms

A glass box extension—also known as a glass room, frameless glass box extension, or glazed extension—is a striking form of home improvement that creates beautifully connected living space while flooding your home with natural light.

Using advanced structural glass, frameless glass panels, and minimalist detailing, our bespoke glass extensions offer a contemporary alternative to traditional house extensions and kitchen extensions, where light, openness, and architectural clarity are key.

Whether you’re extending a kitchen, dining area, or creating a new glass-walled living zone, a glass extension allows uninterrupted views, strong thermal performance, and a seamless connection between indoors and outdoors.

Frameless Glass Walls & Roof Systems

Our frameless glass boxes are engineered using high-performance glass walls and optional glass roof systems, designed to maximise daylight while meeting modern building regulations.

We carefully select the type of glass used in each project, offering thermally efficient glazing solutions that significantly improve thermal performance—helping retain heat in winter and reduce solar gain during warmer months.

Every structure is fully bespoke, meaning your glass box extension is designed specifically for your property, layout, and intended use.

Sliding Door & Entrance Options

To complete your glass box extension, we offer a range of premium door solutions. The most popular choice is our ultra-slim sliding door system, which allows entire glass panels to glide away smoothly—perfect for summer living and entertaining.

These doors provide a seamless transition between interior and exterior spaces, enhancing both functionality and aesthetics while maintaining excellent insulation and security.

Designing Your Bespoke Glass Extension

The design process begins with a site visit to understand your vision and practical requirements. We then collaborate closely with you, your architect, or builder to design a bespoke glass box extension tailored to your home.

You’ll have full control over:

• Glazing options
• Frame colours and finishes
• Door configurations
• Roof and wall glass specifications

Once the design and quotation are approved, we finalise technical drawings, coordinate with all parties, and schedule installation. As all our projects are made to order, typical lead times are around 4 weeks from order to installation.

Glass Box Extension Cost

The glass extension cost varies depending on size, glazing specification, structural requirements, and door systems. Because every project is bespoke, we provide tailored quotations to ensure the best balance of design, performance, and value.

If you’re considering a modern glass box conservatory, frameless glass room, or high-end glass extension, our team will guide you through every step—from concept to completion.