Castle Conservatories

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House Extensions Banstead

Widen your living space in Banstead with a bespoke house extension. These installations are made to match either traditional or contemporary properties. you can choose the exact layout, and match your existing decor with our choice of colours, finishes, windows, doors and hardware accessories. Add value to your home when you choose a stunning extension.

House extensions from Castle offer a wealth of practical benefits and high-performance values. They are designed to withstand strong winds and rain while they offer unrivalled security. The extensions are designed to retain heat within the room with the super-insulating profile. Additionally, they are made to be low maintenance and soundproof for your comfort.

Here at Castle Conservatories, have over 25 years’ experience in home improvements. This has given us specific knowledge and skills which we take on every project we complete. We specialise in double glazing, meaning we are experts in home improvements. Get a free house extension price today by using our free quoting tool. This is quick and easy to use for your next project!


Thermally Efficient

House extensions are designed with thermal efficiency in mind. When fitting a new room to your Banstead property, it’s important it excels in heat retention. With a combination of market-leading materials, these installations work to retain heat inside the room. The extensions are fabricated with super-insulated columns and pelmets. This is to ensure the internal temperature remains at optimum.

Our sleek house extensions are fitted with expansive double glazing. The glass traps pockets of warm air in between the panes. This will fundamentally keep the room cosy and comfortable. As well as this, the glass regulates the internal temperature to prevent the room from becoming too hot in the summer. Reduce your energy bills as you utilise your existing heating, and lower your carbon footprint in the long-term.


With adverse weather comes the need for a durable home improvement product. Each component is tested to ensure decades of performance, ensuring the house extensions can stand the test of time. With columns and pelmets preventing water ingress and wind damage, you can rest assured our house extensions are designed with longevity in mind.

The high-quality extensions will endure the elements over time. They won’t warp, crack, rot or distort and will maintain their modern, sleek appearance. As well as this, house extensions come with little maintenance. The moveable elements simply require a wipe down to keep dust away. This will ensure years of usage in your fantastic house extension.


Each house extension comes with a range of security features installed. This will give our customers in Banstead total peace of mind. The doors and windows as part of the structure are integrated with robust locking systems. The multi-point handle mechanisms will prevent unwanted intruders from forcing entry. Your home, possessions and family will stay safe in our house extensions.

Glazing works as an additional security feature. The glass is internally beaded, meaning it can’t be physically removed from the outside. this will stop unwanted intruders from gaining unlawful access. This will better protect the room, preventing a means of entry through the windows and doors. Stay safe and secure in our superb house extensions.

Why Choose Castle Conservatories?

We are specialists in the home improvement industry, with over 25 years of experience. Our house extensions are entirely bespoke, as we give you creative freedom. We work closely with each Epsom customer to design your dream build. Improve the visual appeal of your property with us.

For your peace of mind, we offer a 10-year insurance backed guarantee. We want our customers to have the reassurance that we are a reliable company. Our skilled team work to the highest standards, installing extensions professionally and efficiently.

House Extension Prices Banstead

Here at Castle Conservatories, we install high-performance house extensions. Everything is made-to-measure, so prices vary based on customer specifications.

Get a free online quote for a no-obligation house extension price. Choose your style, and select your ideal colours, finishes and hardware.

If you have any queries, get in touch via our contact page, and we’ll get back to you as soon as we can. Alternatively, speak to one of our team directly on 020 8669 1500, and we’ll do our best to answer any questions you may have!

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