Extension Builders in Treharris

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 5 (3 reviews)

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Some of our top rated extension builders in Treharris

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Shaun Jones
No reviews yet
Extension Builder in Treharris
I’m a dryliner but over the years of work I have undertaken multiple jobs. So I’m basically a handy man. And can adapt to most work environments. Also worked for Anglian fitting facials gutters and soffits to a high standard
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Thomas Building services (TBS)
No reviews yet
Extension Builder in Treharris
Thomas Building Services/Ponds4U is a father and son business with over 55 years experience. We are members of the Federation of Master Builders and hold the Trustmark government endorsed standards certification. We provide a competitively priced building services to both residential and business customers. Our customers can be confident that the standard of work they receive is of the highest quality.
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C Thomas Building Services
No reviews yet
Extension Builder in Treharris
We are a highly skilled team of general builders specialising in refurbishment/renovations, conversions, kitchens, bathrooms and extensions. I have 20 years experience as a general builder with extensive knowledge of all aspects of construction. All our team members are NVQ City and guild qualified in various trades to ensure everything is carried out to a very high standard. Great care is taken no matter how big or small the job may be, EVERYTHING is built from the heart, not just the hands.
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Ingram plant and groundworks Ltd
No reviews yet
Extension Builder in Treharris
At Ingram plant and Groundworks Ltd we carry out Digs and muck away for Footings, Driveways, Landscaping projects.
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JB Masonry
Rating: 4.7 out of 5
Extension Builder in Treharris
( Reviews in photos Bio ) (40 5⭐️ reviews between my builder & Facebook) Hey my name is Javan business owner of JB Masonry At JB Masonry we bring well over a decade of building Experience. Anything from Garden brickwork walls, patios, hard scaping & extensions full new builds. We cover the whole process from beginning to a satisfactory end leaving minimal stress to the client and the desired finish. Additionally we cover any type of structural repair to domestic or commercial builds. We also take great pride in our stonemasonry work. We also cover Ground works, 360 machine excavation Level 3 NVQ gold card Mason at your service. Get in touch for an immediate Estimate. Services we offer New builds Extensions Patios Brick repair Stone repair Structural steels Concreting Landscaping And any trade outsourcing I hand picked using quality as a metric.
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Latest review:
Extensions- 8 Jan 2025
Jamie is excellent guy, really quick quote, confident tradesman and did an excellent work installing some very chunky steel beams into our 200 year old, random stone house for a doorway extension. Once steels were in, expertly cut and installed the stone back into reveals. Really pleased and will consider again for future works on our precious home.
Shane Davies
No reviews yet
Extension Builder in Treharris
Time served tradesmen 30 years experience family run business quality competitive cost effective service fully insured and guaranteed.
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JLK Property Developments
No reviews yet
Extension Builder in Treharris

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MDR CARPENTRY AND BUILDING SERVICES
Rating: 5 out of 5
Extension Builder in Treharris
All aspects of CARPENTRY and BUILDING. Doors Hand cut roofing Roofing Trusses Extensions Footings Rendering Landscaping Just to name a few things we do
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Latest review:
Conversions - General- 13 Jun 2024
Would highly recommend. Really good job from start to finish even did extra work for me. Very professional and has good tradesmen working along side of him that come on time. Would have again for work.
KR9 Plastering & Carpentry
Rating: 2 out of 5
Extension Builder in Treharris
Hi, I’m Kyle a reliable and hard working plasterer with over 10years of experience in the building and home improvement industry. I take pride in delivering high-quality workmanship, clear communication, and honest pricing on every job — big or small.
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Latest review:
Handyman- 5 Jan 2026
A nice enough guy and fit us in last minute but work is very rough around the edges, really lacking attention to detail. Going to have to pay someone to come and redo parts of the jobs unfortunately.
Brickfitz ltd
New on MyBuilder
Extension Builder in Treharris
Hi I’m Rhys the director of brickfitz Ltd based in Merthyr Tydfil, we undertake all aspects of bricklaying works not only in the local area but have travelled as far as Somerset,Gloucester and beyond. I’ve been a bricklayer for 20+ years with a wealth of knowledge in all aspects of bricklaying and Groundworks, from building houses for major house builders on site, building home extension, boundary and retaining walls, patios etc… I’m very passionate about my job and take a lot of pride in my work to achieve the best quality and to have very good results leaving customers satisfied.
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Dunraven Design Studio Ltd
Rating: 5 out of 5
Extension Builder in Treharris
Dunraven Design Studio provide architectural services throughout South Wales, specialising in providing planning and design advice for all types of domestic building projects. With over 10-years of experience, we have worked on all projects from single and double storey extensions to garage and loft conversions. We work closely with clients to bring their vision to life with precision and creativity and we help you transform your home to create the perfect space to suit your needs.
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Latest review:
CAD / Drawings- 10 Jan 2026
Big thank you to Dan, who was professional through out his involvement. Very skilled communicator, helping us understand the process. Regular calls and emails keeping us up to date with our planning application which with his support and expertise was granted successfully. Would recommend highly.
Mepani Builders
Rating: 5 out of 5
Extension Builder in Treharris
We are group of 4 people all skilled in different trades so we can do A to Z jobs our self. We are fully aware of rules and regulation of building industry and keep ourself updated as well so, we can deliver best quality of work to my customers. We take great pride in our work and like to see the transformation from start to finish.I may not be the cheapest but I am certainly not the dearest,but if you want the job done right to a very high standard then you will want me to do the work. I don't leave at the end of the job until you are completely satisfied with the work. Got construction skill certificate with CSCS Card.
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Latest review:
Handyman- 27 Apr 2012
Very quick service, completed the job well. We would definitely use Mepani Builders again.
Valley's Lofts
No reviews yet
Extension Builder in Treharris
We have been doing loft conversions for over 16 years now and mainly been working around the Cardiff and Bristol area but this year we are starting a company down West Wales. We have a full design and Technical Team working with us, so we can sort everything from planning to painting
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Thomas roofing and building
No reviews yet
Extension Builder in Treharris
I’ve been roofing and building for 24 years and started out working for my father's company after leaving school. 8 years ago, I ventured out and started my own roofing and building company. I’ve covered a vast range of different roofs and building work and can confidently use various materials. My company offers a wide variety of services, including roofing, extensions, internal renovations, garden work including patios and fencing, bathrooms, kitchens and many other services. We are also certified resin driveway and path installers. I have a large portfolio of previous jobs to show customers as I take a lot of pride in what I offer and love sharing our quality workmanship.
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RENOVAE LIMITED
Rating: 5 out of 5
Extension Builder in Treharris
Welcome to Renovae – From Foundation to Future At Renovae, we specialise in construction, extensions, full refurbishments, and property management across Cardiff and surrounding areas. From building extensions and loft conversions to kitchen fitting, RSJ installations, roofing, flooring, and complete home makeovers – we deliver quality workmanship, clear communication, and on-time completion. With years of experience, we work to the highest standards, ensuring every project is safe, efficient, and tailored to your vision. Whether it’s a modern upgrade or a full structural transformation, we guide you from first consultation to final handover. ✅ Fully insured – Public & Employers’ Liability ✅ 24-month workmanship guarantee ✅ Transparent pricing and clear contracts At Renovae, we believe every property has potential – let’s build yours into reality.
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Latest review:
Renovae did an excellent job from start to finish. The team was professional, reliable and always on time. The quality of the work is outstanding and they paid attention to every detail. Communication was clear throughout the project and everything was finished to a very high standard. I would definitely recommend them and will be using them again for future projects.
Morgan Plasterers
Rating: 5 out of 5
Extension Builder in Treharris
My business is plastering.i have been in the trade for 30yrs.i normally plaster full rooms, dry line and render.
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Latest review:
Plastering- 3 Jul 2016
Friendly, efficient, competitively price, clean and tidy!! They've done a really good job of plastering our bedroom ceiling.

Top rated Extension Builders

Our Extension Builders in Treharris, are rated 5 out of 5 based on 3 reviews from customers like you.

Quality screening

Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

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

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 Treharris 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 Treharris who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Treharris?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Treharris 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 Treharris extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Treharris home extension project is likely to cost.

Find extension builders in Treharris with MyBuilder

Hiring the right extension builder in Treharris 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 Treharris extension builders. Once your job is live, we’ll share it with home extension builders in Treharris who can express their interest.

Step 2: Compare different extension builders in Treharris

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

Step 3: Hire Treharris extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Treharris, 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.

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

What to ask a Treharris extension builder before hiring?

Before hiring an extension builder in Treharris or extension building company in Treharris, 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 Treharris?

An extension builder in Treharris 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 Treharris 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 Treharris?

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 Treharris 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 Treharris 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 Treharris

Can an extension builder in Treharris help with planning permission?

Yes, many extension builders in Treharris 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 Treharris handle everything from design to construction?

Many Treharris 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 Treharris help with materials and finishes?

Yes, most extension builders in Treharris 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.