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Glass Box Extensions

About fineline doors

Bespoke Glass House Extensions

Glass extensions come in all shapes and sizes and can be used to create architectural glass structures in different areas of your home. Glass house extensions can add natural light and space to an area that you spend most of your time. Kitchens and dining areas are often the hub of our homes.

Bringing the outside in with a clear glass room structure. This creates a healthy environment for your family. It is for this reason, glass kitchen extensions are one of our most sought-after extensions.

Glass Box Extensions

What Our Clients Say About Us

Creating elegant, structurally unique and safe Glass Extensions throughout the UK.

“The Fineline team delivered our glass boxes in almost impossible timeframes which meant the laser survey and design process was condensed into a very short period of time so that the glass could be ordered. The construction of our glass boxes was then completed to programme with no delays. The product delivered is of exceptional quality and they now offer unique lounge spaces for our guests to enjoy the gardens throughout the year. Thank you to Andrew and his team. Neil Kedward, Managing Director, Seren Collection”

Neil Kedward
Google Review

“Fineline Doors designed and delivered a glass extension to our house and we can’t be more happy with the way it turned out. The product itself is very nice – the glass beams and finish are excellent. The insulation is amazing too – we were a bit worried it would be cold but it works exactly as advertised – not too cold in the winter, not too hot in the summer. The installation was performed by an excellent team, led by Tyler who really knows his stuff. All in all I wouldn’t hesitate to recommend this company.”

John Simmons
Google Review

“Fineline provided me with 3 arched, 2.6m high steal Crittall style doors to the rear of our house and aluminium crittall style windows to our extension and more. We are delighted with the results and the compliments keep coming. Andrew has been a delight to work with and his attention detail very comforting. Highly recommend Glasspace. A glass extension is next and we will definitely be speaking with Andrew, having seen the his previous very extensive projects.”

Google Review

How It Works

Fineline and its team work hard to make the process of adding a new bespoke glass extension to your home or commercial building as easy as possible.

At glasspace we encourage you to take advantage of our complimentary design consultation with an advisor.


Laser scanners give a exact indoor or out door measurement in three dimensions “At your fingertips”

Concept Design

Using the latest 3-dimensional solid modelling and CAD systems, we produce computer-generated images 


All structures are tailor-made to your chosen design, and once the raw materials the aluminium frames will be custom extruded


Your bespoke structure will be installed by our own team of highly skilled fitters / engineers at your location


Our team will ensure your project is completed to the highest level of quality and maintenance will be available

About fineline doors

How Are Modern Glass Extensions Made?

Our custom glass house extensions are meticulously crafted to align with your unique specifications. This bespoke approach enables us to design and construct glass extensions that perfectly complement the size, layout, and desired expansion space of your home. Additionally, our flexibility extends to accommodating various glazing glass panel sizes within the structure of the glass room.

For added structural integrity, our glass room extensions can incorporate a diverse selection of glass support beams or steel supports, ensuring not only aesthetic appeal but also enduring strength and durability. Your glass room will stand as an eye-catching and resilient addition to your home.