Castle Conservatories

Design your dream build online today

Plan your project ideas today by using our unique design tool

Glass Extensions Sutton

For bespoke glass extensions in Sutton, look no further than Castle Conservatories. Add a touch of elegance to your space with our range. Our glass extensions provide a wealth of light without compromising on thermal efficiency. The contemporary style works to update properties or as a welcome addition to modern houses.

Enjoy panoramic views of your garden with our glass extensions, allowing you to appreciate the outside while in the comfort of your new room. With heat retained longer and the cold kept out, you’ll enjoy a comfortable temperature year-round. Find out more about what Castle can offer you today.

A glass extension is different from conservatories and orangeries, features that we also offer. An extension doesn’t have interconnecting doors from your house. Therefore, it widens your space, merging your home with your new build effortlessly. This makes it even more fundamental to provide energy efficiency that matches with your Sutton property.


Thermal Efficiency

With our exceptional double-glazing technology, you won’t have to worry about the cold seeping into your house in Sutton. We use the highest quality materials on the market today to give you a warm space to enjoy.

Our double-glazing specialists are expertly trained to fit your glass with great care and precision, while also working promptly. Keep your heating bills to a minimum as our glass extensions retain heat for longer. This, in turn, reduces your carbon footprint and is extremely economical.

Increased Light

Utilise as much of the natural daylight as you can with our stunning glass extensions. With windows lining the entirety of your design, light can stream into your home. This creates the illusion of a larger space in your Sutton property.

Enhance the light with a choice of glass roofs, which allows sunlight to beam through. Reduce your electricity bills as you let natural light fill your extension, making a positive impact on the environment.


For a contemporary addition that provides style and sophistication, our glass extensions are perfect. If you live in a traditional build but want to modernise your space in Sutton, then we can create a bespoke design.

Or if you’re looking to enhance the look of your garden in a modern property, we have the answer. With a modern look comes advanced technology, so we use the most durable, energy-efficient materials on the market today.


Add character to your Sutton home in a variety of ways. Our glass extensions can transform your space with a new lounge area or a quiet space to escape to. You can enjoy panoramic views of your garden while you relax in a cosy room.

You may choose to have an office space in your new glass extension. Enhancing as much of the natural light as possible, you can work in a comfortable, bright area. Alternatively, you could choose an open plan space to create unity from your house to the extension.

We ensure that each conservatory fits in with the look and feel of your Sutton property, so regardless of how you choose to design it, we can adhere to your preferences.

Classic Conservatory Glass Extension

These designs are predominantly made from our double-glazed windows. While the roof option is down to you, our classic conservatories are typically fitted with a glass roof to fill your space with light. A classic conservatory is very similar to a glass extension but differs with the addition of an interior door. This gives you a space to escape to and feel comfortable at home.

Why choose Castle Conservatories?

We are proud to have over 25 years of experience in the home improvement industry. Our specialist knowledge within the industry means we can efficiently design and install your dream extension.

Our customer focus at Castle means you are guaranteed professionalism and care with us. Extend your Sutton home with us as we strive to provide the best quality. Our 10-year insurance backed guarantee will give you the reassurance that you are in good hands, with a glass extension that’s made to last.

All of our features are tailored to each customer. This allows you to have free reign over your design, as you can decide the finishes. See what we can do for you today!

glass extensions prices sutton

Glass Extension Prices Sutton

We offer competitive prices for our bespoke glass extensions. Enhance your Sutton home today with our beautifully designed spaces. With our sophisticated glass extensions, you shouldn’t compromise on price.

We offer a free online quoting service for our glass features, as well as our other products. This allows you to explore your options and see what price we can give you.

Get in touch today via our contact page. We are happy to answer any questions you have for us about any of our services. Speak to one of our team directly on 020 8669 1500, and we will answer any queries you have.

Latest News

What is the Difference Between an Orangery and a Conservatory?

If you’re planning on designing an Orangery or Conservatory on your property, one question you might be pondering is what the difference between ...

Tiled Conservatory Roofs Prices Carshalton

Can I put a tiled roof on my conservatory?

Conservatories have long been a popular addition to British homes, providing a peaceful spot to enjoy the outdoor views while protecting against ...

glass conservatory

Can you replace a conservatory roof?

A conservatory roof replacement could transform your conservatory entirely, from draughty, leaky, and cold to a space that is comfortable, light ...

Need Help With Directions?

Enter your postcode to instantly get directions to our showroom to view our stunning range of home improvement products!


Design & Plan