House Extensions in Carmarthenshire – Designed for Your Lifestyle
Looking to add more space, value, and comfort to your home? At Wren Construction, we specialise in building high-quality, custom-designed house extensions across Carmarthenshire and throughout Wales. Whether you need a larger kitchen, an extra bedroom, a home office, or a stylish open-plan living area, our team of experts will work with you to create a custom extension plan that meets your unique needs and vision – using only the highest quality materials and craftsmanship.




Create the Home You’ve Always Wanted
Extending your home is a fantastic way to adapt your space to suit your changing lifestyle. From growing families to remote working needs, more and more homeowners are choosing to stay and improve rather than sell and move.
At Wren Construction, we make that possible with seamless, stress-free building services tailored to your property, budget, and goals.
We specialise in all types of house extensions:
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Single-Storey Rear Extensions
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Side Return Extensions
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Double-Storey Extensions
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Wrap-Around Extensions
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Kitchen Extensions
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Garage Conversions & Integral Additions
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Orangeries and Conservatory Conversions
No matter the size or complexity, we approach every project with the same commitment to quality, detail, and communication. From the initial design and planning permissions to construction and final finishing, we’re with you every step of the way.
House Extensions Tailored to Your Needs
Every home – and every family – is different. That’s why our expert team takes the time to understand your needs, your lifestyle, and your property layout before offering the right solution.
Whether you want to:
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Open up your kitchen for family living
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Add an en-suite bedroom or guest room
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Create a dedicated home office or hobby space
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Improve energy efficiency and natural light
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Futureproof your home for accessibility
We design and build extensions that don’t just look great – they function beautifully in your daily life.
Our architects, builders, and project managers work closely together to deliver a design that complements your existing home, maximises space, and complies fully with building regulations in Wales.
Why Choose Wren Construction?
As a trusted Carmarthenshire-based construction company, we’ve earned a strong reputation across West Wales and beyond for delivering home extensions that are practical, stylish, and built to last.
What sets us apart:
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✅ Experienced Builders & Skilled Tradespeople
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✅ Custom Design & Full Project Management
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✅ Transparent Quotes & Timelines
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✅ Work Completed to Building Regulations
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✅ Top-Quality Materials & Finishes
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✅ Local, Reliable, and Fully Insured
We understand that a home extension is a significant investment – which is why we treat your project with the care and professionalism it deserves.
From Llanelli and Ammanford to Llandeilo, Carmarthen, and throughout Wales, we’ve helped homeowners transform their properties with thoughtful and beautifully built extensions.
The Benefits of a House Extension
A house extension is one of the best ways to enhance your home’s space, usability, and value without the cost and hassle of moving.
Here are just a few reasons why it’s a smart choice:
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Increase Your Living Space – Ideal for modern lifestyles and growing families
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Boost Property Value – Well-designed extensions can increase value by up to 25%
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Avoid Moving Costs – Save on stamp duty, estate agent fees, and removals
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Tailored to Your Lifestyle – Build the spaces you truly need
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Modernise Your Home – Improve flow, natural light, and energy efficiency
Whether it’s a new dining room overlooking the garden or an extra bathroom for convenience, a house extension gives you the freedom to improve and personalise your home.
Planning, Permissions & Building Regulations
We understand that the process can feel overwhelming, but don’t worry – we take care of everything. Our team handles:
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Planning permission (if required)
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Building control and regulation compliance
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Liaison with architects and structural engineers
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Full construction and finishing
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Inspections and certification
In many cases, extensions may fall under Permitted Development Rights, especially for single-storey rear additions. We'll help you understand what applies to your property and keep the project compliant at every stage.
Serving All of Wales
While we’re proudly based in Carmarthenshire, we provide house extension services across Wales, including:
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Swansea & Neath Port Talbot
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Pembrokeshire & Ceredigion
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Cardiff & South Wales Valleys
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Powys & Mid Wales
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North Wales (on request)
No matter where you are, our team is ready to help you bring your ideas to life with friendly advice and expert building services.
Let’s Build Your Dream Space – Contact Us Today
If you're ready to expand your home and improve your lifestyle, Wren Construction is here to help. We offer free site visits, detailed quotations, and clear guidance from concept to completion.
Discover how easy it can be to add beautiful, functional space to your home with Wren Construction – the trusted name for house extensions in Carmarthenshire and across Wales.