Glass Box Extensions

Glass Box Extensions

Contemporary frameless glass box extensions

Our modern, contemporary, frameless glass and glass box extensions have been developed over the last 30 years to create rooms made entirely of structural glass. Combining our temperature-controlled warm edge technology with specialist structural glass to create awe-inspiring, yet practical spaces, that can be enjoyed no matter the weather. Frameless glass compliments both old and new properties, effectively blending with a seamless connection to the existing building to extend, enclose, link two spaces together, or even create a double-story glass wall. They provide more space and will help your home to flow and work better for you. As well as our state-of-the-art frameless glass structures, we can also supply custom-made sliding door systems, balustrades, staircases, glass panels and screens and roof lights.


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Learn more about our premium frameless glass box extension range in our digital brochure.



Individually designed for you

Our glass rooms are the height of contemporary and modern style. The frameless finish gives a sleek and modern look with uninterrupted views of your garden and outdoor surroundings. Our designers have extensive experience in creating your tailor-made bespoke glass room extension. We can guide you whether you are looking for a simplistic box extension, a double height glass wall or an ultra-modern gable ended structure.



Your new living space should be enjoyed throughout the seasons, so our modern glass extensions use strong structural glass with built in temperature control that lets in lots of natural light while providing ultimate comfort to your glass extension. Keeping your contemporary glass extension warm and welcoming in winter, yet cool and airy in summer. Our “New Generation Glass”, originating from America, uses state-of-the-art glazing technology, to ensure all year use of your glass room, and is only available in the UK exclusively to Room Outside ®.

The transformation to our living area with so much light and feeling of space has been quite remarkable. Our glass space is our favourite space.


Create your dream glass extension

Room Outside will work to understand your individual style preferences, requirements, and how you want to use the space, to create a luxury contemporary glass extension tailored to your unique vision. Adding a home extension which offers both style and practicality, along with a guaranteed hallmark of quality and distinction is our top priority. We will ensure that your completed space delivers in all areas, enhancing both your life and the footprint of your home.


Our expert designers will guide you

Our experienced Design Consultants will work closely with you exploring ideas and taking inspiration from your lifestyle and property architecture. As well as considering complimentary styles for listed buildings or homes in areas of outstanding natural beauty, to blend sympathetically with the original building style. Quite often our glass extensions will not require planning permission, but our team will be happy to advise and point you in the right direction. We have the knowledge, expertise, and experience to offer the right solution, to create a glass room that enhances and adds value to your home.

Start planning your dream glass extension today

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