Extension builders in South Glamorgan

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 5 (5 reviews)

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Some of our top rated extension builders in South Glamorgan

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Premierfinish
Rating: 4.9 out of 5
Extension Builder in South Glamorgan
Welcome to Premier Finish Property Construction Ltd, an innovative building firm specialising in general building projects & construction, renovation & refurbishment and structural integrity repairs. Having been in the construction industry for over 20+years, we have amassed a wealth of experience in the industry. Specialist trades include, structural support methods using the Cintec Anchor System and Helifix structural repair solutions for masonry reinforcement, plastering, coving & decorative wall decoration, exterior applications of Rendering including EWI thermal wall insulation, kitchen installation, bathroom fitting, windows & doors & much more. We prioritise a personalised approach, ensuring a seamless experience at every stage of your project. Our dedicated team manages everything from small renovations to large-scale builds with the utmost professionalism and care. Trust us for high-quality finishes and transformative results.
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Latest review:
Restoration & Refurbishment- 13 Sep 2026
What a find for us. Knew exactly what they were doing. Great job at a great price. Finished on time . Would recommend them anytime.
Engwell Building Services
Rating: 5 out of 5
Extension Builder in South Glamorgan
I am a qualified Bricklayer. Engwell Building services are an established business with over 25 years of experience in the field. Based in Penpedairheol (Hengoed), Engwell Building Services has an ever growing customer base, through the Local Valleys area all the way to Cardiff. Providing services for individuals and organisations like Local Councils and Churches. Whatever your need, don’t hesitate to contact us and see how we can help you.
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Latest review:
Extensions- 5 Sep 2025
We are so glad we chose Mark and the team! From start to finish. Sorting the structural calculations, dealing with the building control department and co ordinating the contractors needed to complete the job. Great communication, trustworthy and a pleasure to deal with. In some ways we are sad that they have finished! Quality work, completed in good time. Scheduled payments as the job progressed. Running my own business I am always critical of other services. I can safely say there isn’t one thing I could criticise. Building control required additional specifications but Mark didn't charge us any extra. A man to his word and price. We are so happy with the end result. Would highly recommend Engwell Building services. Top people. Top job.
dns property development limited
No reviews yet
Extension Builder in South Glamorgan
At DNS Property Development, we specialise in high-quality home renovations, extensions, property refurbishments, kitchens, bathrooms, and complete home transformations across South Wales. We understand that choosing the right contractor is a big decision, so we pride ourselves on being reliable, honest, and delivering workmanship to the highest standard. From the initial consultation through to project completion, we work closely with our customers to ensure every project is completed on time, within budget, and to the highest quality. Whether you’re planning a single-room renovation, a house extension, or a full property refurbishment, we’d be delighted to discuss your ideas and provide a free, no-obligation quotation. Thank you for considering DNS Property Development. We look forward to helping bring your vision to life.
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Linton Electrical Services
Rating: 5 out of 5
Extension Builder in South Glamorgan
Dear Customer, We are a team of brothers- A fully qualified electrician and a general builder specialising in all building trades. With a combined experience 30+ we have the right skills offer you an in house solution to your home improvement/ renovation needs. We pay attention to your requirements and the small details to ensure that our work meets your expectations. Thank you for reading, please get in touch!
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Latest review:
Electrical- 7 May 2019
Gary answered all my questions beforehand, of which there were many, and did an excellent job. Very pleased with all his work and advise on required safety features all around the house. Would definitely use him again.
anthony evans
Rating: 5 out of 5
Extension Builder in South Glamorgan
My name is Anthony, I have been in the building trade for 25 years, self employed for 15 of those. I am friendly, professional and 100% dedicated to my work/customers. I have built up an excellent reputation for my quality of work, respecting my customers wishes and offering advice where I can in order to create their ultimate goal.
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Latest review:
Extensions- 2 Sep 2020
I can highly recommend Anthony & Dean of Edge Construction they built a two story extension for us that we are very pleased with. Quality of work and commitment displayed was excellent they provided a realistic quote which was the final cost apart from extra work we requested. Total all round positive service . Gareth Jones
JMD Carpentry
Rating: 5 out of 5
Extension Builder in South Glamorgan
I work alongside my brother. We undertake all aspects of carpentry and brickwork to high level. We have 10+ years experience in the trade. We complete all our work to the highest standard. Making sure our customers are happy with our work is our priority.
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Latest review:
Carpentry- 18 Jan 2023
Really happy with the work Joel completed - very polite, professional and finished job to a really high standard. He was prompt and reasonable and made sure everything g was clean afterwards. Am delighted and would definitely recommend!
Elevia
No reviews yet
Extension Builder in South Glamorgan
We are a reliable building company specialising in high-quality residential construction and renovation work. From extensions and refurbishments to full project management, we take pride in delivering exceptional workmanship, clear communication, and honest pricing. Every project is handled with care and attention to detail, ensuring work is completed safely, on time, and to the highest standards. We work closely with our clients from the initial consultation through to completion, making the process straightforward and stress-free.
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A little bit of everything
Rating: 4.2 out of 5
Extension Builder in South Glamorgan
For the past year, our handyman business has been dedicated to providing reliable, high-quality home improvement services. With expertise in plumbing, painting, and plastering, we pride ourselves on delivering skilled workmanship, honest communication, and dependable results on every project—big or small. Our mission is to help homeowners maintain safe, functional, and beautifully finished spaces through efficient service and attention to detail. Why Choose Us Customers choose us because we combine professional skill with a personal, trustworthy approach. We show up on time, treat every property with care, and complete each job to a standard we’d be proud to have in our own homes. With fair pricing, clear explanations, and a commitment to quality, we make sure every client feels confident their job is in good hands.
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Latest review:
Plumbing- 29 Oct 2026
Firstly as some have said it’s not cheap BUT Greg knows his stuff and the waiting time is minimal. I would definitely recommend if you need something done quickly to an high standard and are prepared to pay extra.
Collier installations
No reviews yet
Extension Builder in South Glamorgan
Hi guys, I’m Lloyd. I’m a competent installer in many trades, specifically windows & doors as my profession as an MTC (FENSA) approved installer. No job is too big or small for any aspect of work, I also have a great team behind me and we work to the highest of standards. Feel free to ask any questions that you may have, thank you.
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LET’S BUILD SW LTD
No reviews yet
Extension Builder in South Glamorgan
Welcome to Let’s Build — your trusted building and renovation team covering South Wales and Cardiff. We take pride in delivering high-quality construction, refurbishment, and home improvement services tailored to your needs. From full property renovations and kitchen or bathroom installations to extensions, conversions, and general building work — we handle every stage with care, skill, and attention to detail. Our team believes in doing things the right way: reliable workmanship, transparent pricing, and clear communication from start to finish. At Let’s Build, we treat every project as if it were our own home, ensuring durable, professional results that stand the test of time. Whether you’re updating one room or transforming your entire property, you can count on us for a friendly, dependable, and professional service across Cardiff and South Wales.
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Edge carpentry and construction ltd
Rating: 5 out of 5
Extension Builder in South Glamorgan
We have been in the building trade for over 30 years and provide quality tradesmen for all your building needs from small garden walls to complete house building projects extension renovations and conversions
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Latest review:
Extensions- 27 Mar 2025
Really pleased with my single storey extension. It's been up 5 months now and no problems. Dean is a great guy to work with and I felt comfortable with him and his team when home alone with small kids. Would use him again and I would recommend him.
Morgan & son solutions
Rating: 5 out of 5
Extension Builder in South Glamorgan
Been in construction and landscaping in South Wales for nearly 30 years have a range of experience in all areas providing a professional and reliable service. We take pride in the way we approach jobs with designs that suit the client and maximise the wow factor with the budget
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Latest review:
Extensions- 26 Feb 2024
Fantastic job building a small plant room - lean-to. Reliable and tidy work. Great craftsmanship. Highly recommend.
LFB CONTRACTORS LTD
No reviews yet
Extension Builder in South Glamorgan
Look Fresh Building Contractors Ltd is a trusted and reliable construction company dedicated to delivering high-quality building services with precision and professionalism. We specialise in residential and commercial projects, offering expert solutions in renovations, extensions, refurbishments, and new builds. At Look Fresh Building Contractors Ltd, we pride ourselves on attention to detail, strong workmanship, and a commitment to customer satisfaction. Our experienced team works closely with clients from concept to completion, ensuring every project is delivered on time, within budget, and to the highest standards. Whether you’re transforming your home, upgrading your business space, or starting a brand-new build, Look Fresh Building Contractors Ltd is here to bring your vision to life — with quality you can see and results that last.
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J V Joinery
No reviews yet
Extension Builder in South Glamorgan
Josh vesey is a high class carpenter and joiner working under the Name of J V Joinery. I have a vast background of knowledge and experience in my respected craft. I have trained as a traditional handcraft joiner and carpenter, with a good and solid portfolio from many years of hard work in the domestic and commercial building sectors. I specialise in restoration joinery, which includes sliding sash and casement windows and doors, aswell as high class framing carpentry and finish joinery.
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AAbuildingcontractors
Rating: 5 out of 5
Extension Builder in South Glamorgan
We are a partnership both worked in the construction industry for many years. An undertaker all renovation and Convertion work.
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Latest review:
Plumbing- 20 Apr 2018
Very pleased with the work completed. Aaron and his apprentice Gareth arrived on time and were very pleasant and respectful throughout the whole process. Aaron allowed us time to talk things through when needed which was very helpful. They both worked quietly, efficiently and their work was very neat. Aaron was also very knowledgeable and was able to answer any questions asked. The price was competitively priced and well worth the money. Would definitely recommend.
Williams & Price Building services ltd
Rating: 5 out of 5
Extension Builder in South Glamorgan
Williams & Price are members of the Federation of master builders,We offer a stress free approach to the client when providing our services,as we believe it is crucial to be the best in our industry in order to grow as a business.Specialising in property extensions ,with a combined experience of 35+ years in the building industry.Williams and Price pride themselves on completing all projects to the highest of standards,whilst communicating with the client throughout the entire process .
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Latest review:
Liam and Stephen done a great job building my extension,we are really happy with how it turned out,I would 100% recommended them.

Top rated Extension Builders

Our Extension Builders in South Glamorgan, are rated 5 out of 5 based on 5 reviews from customers like you.

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What types of services are offered by local extension builders in South Glamorgan?

Building an extension is a major milestone for any home. It’s not just about adding extra space, it’s a big step that can transform how you live day to day, opening up new possibilities for comfort, lifestyle, and family needs.

This is why it’s so important to find the right extension builders in South Glamorgan for you. They can help with a variety of tasks and projects, including:

Extending your home with an extra room
Two+ storey extensions
Adding partition walls to create more rooms
Building annexes or external structures

To find the right extension builder near you, simply post your job on MyBuilder. Explain the type of help you’re looking for, and then home extension builders in South Glamorgan who are available and interested can respond to your post.

Browse profiles, read customer reviews and get quotes from your chosen South Glamorgan extension builders, all before you decide who to hire.

What are the hourly rates of extension builders in South Glamorgan?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in South Glamorgan will charge between £16 and £42 per hour.

Single-storey rear extensions cost between £20,000 and £60,000 depending on size and finish.
The cost of double-storey extensions, which add more space and value, can range from £100,000 to over £170,000.
Larger wrap-around extensions that combine multiple extension types can range from £40,000 to over £120,000.

The cost of an extension will vary depending on your property. For instance, extending in certain areas may require structural adjustments to ensure stability, which can increase your material and labour costs.

To get an accurate price for your home extension, request detailed quotes from several South Glamorgan extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your South Glamorgan home extension project is likely to cost.

Find extension builders in South Glamorgan with MyBuilder

Hiring the right extension builder in South Glamorgan with MyBuilder couldn’t be easier. Just follow these simple steps:

Step 1: Post your extension project on MyBuilder

Whether you’re planning a single-storey extension, a loft conversion, or adding a new room, post your job on MyBuilder to find local South Glamorgan extension builders. Once your job is live, we’ll share it with home extension builders in South Glamorgan who can express their interest.

Step 2: Compare different extension builders in South Glamorgan

When you start receiving interest, review profiles of local South Glamorgan extension builders, check their previous work, and read real customer reviews. Ask about timelines, materials, and request detailed quotes.

Step 3: Hire South Glamorgan extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in South Glamorgan, compare their experience, guarantees, and costs before choosing who to hire.

You’ll also have confidence knowing that every tradesperson on MyBuilder is verified through several checks, including:

ID verification: When a tradesperson joins MyBuilder, we ask for a valid ID, such as a passport, ID card, or eIDAS certificate.
Company verification: For tradespeople operating under a company, we make sure every tradesperson has a registered business.

Did you know? Our continuous monitoring and complaints process ensures that tradespeople who don’t meet our standards are promptly removed from MyBuilder’s platform.

South Glamorgan extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a South Glamorgan extension builder before hiring?

Before hiring an extension builder in South Glamorgan or extension building company in South Glamorgan, ask a few key questions to make sure you’re choosing the right professional for your home extension project.

What qualifications and experience do you have as an extension builder in South Glamorgan?

An extension builder in South Glamorgan should have a strong track record with similar projects and relevant building qualifications or trade memberships, such as the Federation of Master Builders (FMB) or TrustMark.

Will my home extension meet all building regulations and planning requirements?

Your South Glamorgan extension builder should ensure the project complies with Building Regulations and, where necessary, handle or assist with planning permissions. Ask how they manage building control inspections and what documentation you’ll receive once the project is complete.

What experience do you have with similar extensions in South Glamorgan?

Ask to see examples of their previous work, or view examples of their work on MyBuilder. Ideally projects similar to yours in scale and design. This helps you assess the South Glamorgan extension builder’s ability to deliver a result that meets your expectations.

How long will the extension take to complete?

Extension project timelines can vary depending on size, complexity, and weather. A typical single-storey extension might take around 8 - 12 weeks. Request a detailed schedule so you know what to expect and when key milestones will be reached.

Do you offer a guarantee for your work? Most South Glamorgan extension builders offer a guarantee or warranty on their work, often between 1 and 10 years depending on the project and materials used. This gives you assurance that any issues will be resolved after completion.

If you still have questions about the professional you are looking to hire, we have a full detailed guide on hiring the right builder here.

FAQ: Common questions about home extensions in South Glamorgan

Can an extension builder in South Glamorgan help with planning permission?

Yes, many extension builders in South Glamorgan can guide you through the planning process. They can help prepare drawings, advise on local requirements, and liaise with your local council to ensure your project meets all necessary regulations.

Can an extension builder in South Glamorgan handle everything from design to construction?

Many South Glamorgan extension builders offer full design-and-build services, managing both the architectural planning and construction stages. Ask your builder whether they can provide a complete package or if you’ll need to hire an architect or designer separately.

Will an extension builder in South Glamorgan help with materials and finishes?

Yes, most extension builders in South Glamorgan can source materials and offer advice on finishes that suit your design and budget. You can also choose to supply certain materials yourself, just make sure this is agreed upon before work starts.