Create Space. Add Value. Transform How You Live.
Sometimes a house just needs that little bit more – more space, more comfort, more flexibility. A home extension is the perfect way to unlock your property’s potential, adding both practicality and value while creating a space that truly works for you and your family.
Imagine the Possibilities
A bright, open-plan kitchen where the family can gather.
A proper utility room to keep the laundry (and mess) out of sight.
A ground-floor bedroom with en-suite for a loved one or elderly parent.
A shower room or WC downstairs for convenience.
A games room, home office, or studio that adapts with your lifestyle.
From Foundations to Finishing Touches
Building an extension isn’t just about adding walls and a roof – it’s about delivering a seamless addition that looks and feels like part of your home.
With over 30 years of experience, we manage every stage of the process, including:
- Groundworks and drainage
- Insulation and energy-efficient construction
- Structural steels (working with qualified structural engineers)
- Plumbing, heating, and electrics
- Plastering and interior finishes
- Windows, doors, roofing, and rendering (where required)
- Landscaping to tie it all together
From start to finish, we can turn your dreams into reality, whether that’s a larger open-plan kitchen or living room, or a brand new room entirely.
A Single Point of Contact
Coordinating multiple trades can be stressful and risky. With Adfer Cymru, you don’t have to juggle builders, plumbers, and electricians — Ian and his trusted team handle the lot. We project manage every stage to ensure your extension is delivered on time, on budget, and to the highest standard.
Why Choose an Extension?
In some cases, an extension is the best way to get exactly what you want, tailored to your lifestyle needs.
It can also add significant value to your property, and it can futureproof your home for accessibility or growing families
Designed and built with precision and care, we work with you to make sure your dream home extension becomes your favourite space in your entire house.
Not got room outdoors for an extension? We also undertake garage conversions.
Get in touch with Adfer Cymru today to discuss your ideas and arrange a quote.
Frequently Asked Questions
Do I need planning permission for a home extension?
How do Building Regulations differ from planning permission?
How do you ensure the extension blends with the existing house?
We pay close attention to details such as roof pitch, materials, brickwork, render, and window styles. We can source matching or sympathetic finishes to make the new addition feel like a natural part of your home rather than an afterthought.
Equally, some clients choose to make the extension a contrast to add a dramatic design aesthetic, opting for a rendered or cladded finish. We work with you to use materials that create the statement you desire.
Can you design for futureproofing, such as accessibility?
Yes – many clients choose ground-floor bedrooms, wet rooms, or wider doorways to futureproof their homes. Whether for ageing relatives, mobility needs, or just long-term planning, we design with flexibility and accessibility in mind.
What role does a structural engineer play in the project?
If your extension involves removing load-bearing walls or installing steel beams, a structural engineer will calculate the required supports. We only work with qualified engineers and ensure their designs are followed precisely for safety and compliance.
How do you handle insulation and energy efficiency?
We build to modern energy standards, using high-performance insulation, airtight construction, and quality glazing. This not only keeps your extension comfortable year-round but also helps improve your property’s EPC rating and reduce energy bills.
Can you take care of plumbing, heating, and electrics?
Yes – we provide a full service. That includes integrating heating systems, relocating or upgrading boilers if needed, adding underfloor heating, and ensuring electrics meet the latest Part P standards. All work is certified by trusted, qualified engineers.
How disruptive is the build process?
Extensions inevitably involve some disruption, but we work to minimise it. We keep access routes safe, schedule noisy or dusty work thoughtfully, and maintain clear communication throughout. Our aim is to deliver the build with as little stress as possible.
Will an extension add value to my home?
In most cases, yes. Adding additional living space is one of the best ways to increase a property’s value — particularly open-plan kitchen/diners and practical bedrooms, bathrooms, dens, gaming rooms and studios for hobbies or exercise.
We can help you weigh up the likely return on investment for your specific project.
How long does a typical extension take?
Every project is different, and so the timeframe depends on size, complexity, site access and scope.
Typically, most single-storey extensions take between 10–16 weeks from groundwork to completion.
We’ll provide a realistic schedule upfront and keep you updated at every stage so you always know what’s happening next. We’ll keep you updated throughout and explain the impact of any unforeseen issues that occasionally crop up.
