Extensions
High-Quality House Extensions Built to Last
At Castle Construction, we specialise in designing and building home extensions that are practical, durable, and expertly finished. Whether you’re looking to add a new kitchen, extra bedroom, home office, or living space, our team manages every part of the build with care and precision — from foundations to roofing.
Our Process
From the initial consultation to the final finish, Castle Construction handles every stage of your extension project. We start with a site visit to assess your property, then work alongside architects and structural engineers to bring your plans to life.
Our experienced team manages the groundwork, structural build, roofing, insulation, windows, doors, and finishing — ensuring quality at every step. We also keep the site safe and tidy while working with minimal disruption.
Types of Extensions We Build
We offer all types of residential extensions, including:
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Rear extensions
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Side returns
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Double-height builds
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Kitchen extensions
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Loft-linked or garage-top structures
No two homes are the same — and we customise every build to fit the property style, layout, and the client’s vision. Whether modern or traditional, we can deliver a seamless addition that blends beautifully with your home.
Why Extend Your Home?
A well-planned extension adds value, improves lifestyle, and saves the hassle and cost of moving house. It’s a smart way to expand your home to suit changing needs — whether you need more space for a growing family, working from home, or simply want to upgrade your living space.
An extension also boosts your property’s resale value and kerb appeal, making it a worthwhile investment in the short and long term.
What we do
We deliver tailored extension solutions for homes across the Home Counties. Our services include:
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Single-storey and double-storey extensions
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Rear, side, wraparound and over-structure builds
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Kitchen and open-plan living spaces
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Planning permission support and building regulation compliance
We take the time to understand your goals and ensure the final result improves both your living space and the value of your property.
Why Choose Castle Construction?
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We’re a family-run business with deep roots in the construction trade, bringing years of hands-on experience to every job. All work is carried out by qualified tradespeople, including our in-house bricklaying team and trusted subcontractors.
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Free site visits and quotes
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NVQ-qualified team
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Full project management
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Structural and architectural collaboration
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Public liability cover up to £5 million
We don’t just build to finish — we build with pride and care, treating every home like it’s our own.
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Get a Free Quote for Your House Extension
If you’re thinking about extending your home, speak to Castle Construction today. We’ll walk you through the process, offer expert advice, and provide a detailed quote — all with no pressure.
REVIEWS
"Brilliant from start to finish!"
“We had Castle Construction build a rear extension and couldn't be happier with the results. The team were professional, tidy, and always kept us updated. The quality of the brickwork and finish is top-notch — it blends perfectly with our existing house. Highly recommend them if you want a job done properly.”
— Rachel M., Hertford
“Castle Construction carried out all the groundwork and steel installation on our new build. They were on time, well-organised, and worked really well with our architect. The crew were polite and kept the site tidy throughout. We’ll be using them again on the next phase of our development.”
— James T., Oxfordshire
“The team designed and installed a new patio in our garden and it’s completely transformed the space. Everything from the layout advice to the final cleanup was handled with care. The attention to detail was spot on, and they delivered exactly what we were hoping for.”
— Sophie L., London
CONTACT US
07929 291937
info@castleconstruction.ltd
SERVICE AREAS
Castle Construction proudly serves clients throughout the Home Counties and surrounding regions, including London, Hertford, and Oxfordshire. If you're located nearby and need a trusted team for your project — we’d be happy to help.
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