Extension Builders in Caerphilly

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

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Some of our top rated extension builders in Caerphilly

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Dunraven Design Studio Ltd
Rating: 5 out of 5
Extension Builder in Caerphilly
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.
Walsh carpentry
No reviews yet
Extension Builder in Caerphilly
Walsh carpentry and building is a cardiff based company covering all aspects of carpentry and building work to a high standard.
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S&T Haycock Construction
No reviews yet
Extension Builder in Caerphilly
Family run business with over 40 years experience in the construction industry
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Blackrock construction ltd
New on MyBuilder
Extension Builder in Caerphilly
Hi, I'm Mark, an experienced builder specialising in extensions, structural work, brickwork, foundations, and home improvements. I take pride in delivering quality workmanship and a reliable service from start to finish. My focus is on honest communication, attention to detail, and ensuring every project is completed to a high standard. Whether you're planning an extension, renovation, or structural alteration, I aim to provide a professional service and results that exceed expectations.
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Zetasin Engineering
No reviews yet
Extension Builder in Caerphilly
At ZetaSin Engineering, we take pride in our comprehensive approach to structural engineering. Whether you envision a loft conversion to create additional living space, an extension to accommodate a growing family or a refurbishment project to breathe new life into your home, we have the expertise to help you design your dreams into reality. Design and analysis packages (calculation packages), project management for Loft Conversions, Extensions, and Refurbishments.
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Kieran McConnachie
No reviews yet
Extension Builder in Caerphilly
Hi, my names Kieran and I run multiple companies in the building industry. We offer residential and commercial services and maintenance. Over the last 10 years we have developed a large portfolio of works in all aspects, any from extensions, conversions, kitchen & bathroom fitting, plastering, painting & decorating, etc. All work is taken with pride and attention to detail, clean and in line with health and safety protocols. We have no doubt you will be happy with our work. Thanks.
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RME Building Services Ltd
No reviews yet
Extension Builder in Caerphilly
RME Building & Electrical Services Ltd. We are Building and Electrical contractors based in the S.Wales area, with over 18 years in the construction industry. In this time we have built up a great client base and a great reputation. We are fully certified & insured and hold current Safecontractor & Constructionline We deal with every aspect of your project from start to finish. We work closely with all our professional and highly skilled contractors all qualified in their own trades.
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Jac Jones Construction
No reviews yet
Extension Builder in Caerphilly
South Wales based Construction company. specialize in groundwork, new builds and civil engineering. We cover all aspects of the building trades with a well established team of professional time served tradesmen. We work with many independent architects and surveyors, have great relationships with the local authorities and building control. Being a member of Federation of Master Builders gives the client great benefits from guaranteed work, discounted Structural warranties and peace of mind
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L Davies Building Contractor
No reviews yet
Extension Builder in Caerphilly
Established 25 years Bricklayer by trade ,property developer . My work varies from ,bricklaying, stonework, refurbishment, extensions, landscaping, driveways most building work
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TTC Construction
Rating: 5 out of 5
Extension Builder in Caerphilly
I am a versatile and experienced tradesman, taking pride in being a clean, tidy, reliable and a trustworthy professional. I have team of experienced tradesmen that I can rely on and trust. I project managed jobs from start to finsh and enjoy working closely with cliants. Please look at my references.
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Latest review:
Extensions- 25 Sep 2014
Tony is possibly the best option you have. He is genuine, trustworthy, a man of his word and prices competitively. Even if he isn't the cheapest quote you get you should still try to employ him as he won't let you down. He's been doing this sort of thing since he was a young lad, and even though he's still relatively young in the scheme of things do not be fooled, he knows his stuff. It has been an absolute pleasure having Tony do our extension, and I am very happy to have anyone over who wants to take a look to discuss the quality of his work before proceeding with him. And no, this is not a plant! I am just a very happy customer.
a.s building & groundworks
No reviews yet
Extension Builder in Caerphilly
we are a well established building and groundworks company that has been in the industry for many years working with a reputable architect helping customers achieve the ambition of there dream home or garden, we undertake every aspect of construction work. Working in partnership with hillier construction services ltd, we can deliver on any project required.
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Williams Carpentry & Building Contractors Ltd
No reviews yet
Extension Builder in Caerphilly
We are a carpentry & building company, we take on any type of construction work, kitchens, bedrooms, bathrooms, extensions, garage conversions, landscaping & gardening. We have completed extensive work in many schools, office refurbishments, universities, apartment renovations.
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Lass groundworks and construction
Rating: 5 out of 5
Extension Builder in Caerphilly
Driveways patios drainage all aspects of groundworks extensions and landscaping we have a combined experience of 20 years we are here for you the client we try and work to your budget so we won't be beaten on price
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Latest review:
Landscaping- 21 Apr 2021
Am happy with the work , the team was very friendly and has good communication skills, I was involved/ informed of the process as the work was carried out. Would highly recommend them to anyone.
Evolution tiling
No reviews yet
Extension Builder in Caerphilly
Evolution plumbing and tiling . Full bathroom installations . Craig has over 25 years experience in the building industry and has established himself as a leading and award winning subcontractor for several major house builders. Craig now concentrates on full bathroom installations from start to finish and covers all aspects of the building works to complete bathroom to a high standard. A reliable , punctual and trustworthy tradesman . Craig has a long list of happy and loyal customers. All works carried out are guaranteed for 12 months.
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Birch wood carpentry
No reviews yet
Extension Builder in Caerphilly
At Birch wood carpentry, we take pride in our commitment to excellence by dedicating our full attention to one project at a time. This exclusive focus ensures that our team can provide unparalleled craftsmanship and undivided attention to every detail of your conversion, delivering a bespoke living space that exceeds your expectations. With our personalized approach, we prioritize quality over quantity, guaranteeing a seamless and dedicated transformation process for each client. Trust Birch wood carpentry to elevate your home with a unique and tailored conversion experience.
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Golden web group Ltd
No reviews yet
Extension Builder in Caerphilly
GWG is a leading construction and property development company in Cardiff. We specialize in all aspects of construction and property development, including energy efficiency, building and construction, property maintenance, painting and decorating, electrical and plumbing, kitchen and bathroom, flooring and tiling, and carpentry and joinery. Our goal is to create sustainable and innovative living spaces that meet the needs of our clients while minimizing our impact on the environment.
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Top rated Extension Builders

Our Extension Builders in Caerphilly, 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 Caerphilly?

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

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

What are the hourly rates of extension builders in Caerphilly?

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

Find extension builders in Caerphilly with MyBuilder

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

Step 2: Compare different extension builders in Caerphilly

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

Step 3: Hire Caerphilly extension builders with confidence

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

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

What to ask a Caerphilly extension builder before hiring?

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

An extension builder in Caerphilly 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 Caerphilly 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 Caerphilly?

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 Caerphilly 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 Caerphilly 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 Caerphilly

Can an extension builder in Caerphilly help with planning permission?

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

Many Caerphilly 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 Caerphilly help with materials and finishes?

Yes, most extension builders in Caerphilly 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.