Extension Builders in Caerphilly

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

Easily find verified Caerphilly Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in Caerphilly.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in Caerphilly

435 Results

Sort by:

A1 Building Solutions
Rating: 4.5 out of 5
Extension Builder in Caerphilly
With experience in all aspects of building works here at A1 Building solutions we cover all types of building works from the footing rite up to the chimney all works we carry out comes with a 12 month guarantee
Get in touch
Latest review:
Extensions- 8 Jan 2025
I contacted A1 builders for a quote on an extension inside kitchen area renovated with new fitted kitchen installed. The quote was fair and we did come into some complications but it was rectified. Workers were polite and friendly although a little untidy but the end result far exceeded my expectations and I’m very happy with the work and will use A1 builders again.
Cleverly associates ltd
Rating: 4.9 out of 5
Extension Builder in Caerphilly
We are a long established family owned and run Limited company. With over 35 years experience in the building trade. We pride ourselves in our hassle free, open, honest approach where we believe we offer a competitive, professional, reliable service which is second to none.
Get in touch
Latest review:
Extensions- 27 Jul 2018
CAL provided a competitive quote and completed the work quickly and to schedule. Additional works pushed the cost over budget but these were detailed in the invoicing. Messy at times but generally a punctual and professional service, able to recommend and worth including in your search for contractors.
Ashgwen building services LTD
Rating: 5 out of 5
Extension Builder in Caerphilly
With over 20 years of experience in the building industry, a wealth of knowledge and second to none workmanship means you can trust the job you want done, will be done right. Working throughout South Wales from Cardiff to Fishguard. All aspect of building work completed, from mall plastering jobs, kitchens and bathrooms to extensions and conversions. Honest, friendly and reliable.
Get in touch
Latest review:
Conversions - General- 26 Nov 2025
Excellent job. Really pleased with the quality of work and wouldn’t hesitate to hire again and recommend to family, friends and neighbours. As a matter of fact, my neighbour has recently taken on Ashgwen Building Services Ltd to carry out some work on their home, too.
Chris Muscat Carpentry & Renovations
Rating: 5 out of 5
Extension Builder in Caerphilly
Hi, I’m Chris, an independent and fully insured, qualified carpenter offering reliable, high-quality workmanship across all aspects of carpentry and property renovation. I take genuine pride in my work and have a strong attention to detail, professional approach, and solid work ethic. I aim to deliver every project to a high standard while keeping work areas clean, organised, and disruption to a minimum. My services include: Full & partial property renovations Kitchen fitting & installation First fix carpentry (framing, stud walls, joists) Second fix carpentry (doors, skirting, architraves & finishing work) Fencing & decking Outdoor timber frame buildings Property maintenance & restoration Whether it’s a small repair or a larger renovation project, I provide honest advice, clear communication, and dependable service from start to finish.
Get in touch
Latest review:
We found Chris extremely helpful through the build process and he came up with a number of fresh ideas to save us money. We are delighted with the finished building which was brought in ahead of schedule and within budget. It’s rare to find a friendly competent building with good communication skills. We intend on using Chris again on other projects. Highly recommended.
Quality Building & Roofing Contractors
Rating: 5 out of 5
Extension Builder in Caerphilly
Hi My name is Michael and I own QBR Contractors Ltd. I am a fully qualified site manager, with an NVQ6 in construction management. I am up to date on all CDM requirements, and I have all the necessary tickets to legally run all relevant jobs. I am also a qualified bricklayer and roofer with over 35 years experience in the trade. I have managed many sites and built many houses and extensions all over the South Wales area and can get client references if needed.
Get in touch
Latest review:
Roofing (Pitched)- 11 Feb 2020
He was very good and fixed the roof professionally. I will definitely recommend to my family and friends
Floem - Home and Garden Improvements
Rating: 4.7 out of 5
Extension Builder in Caerphilly
Floem is the group of professional, qualified trade workers, with many years of experience on most of the fields around property maintanance, improvements and renovations. Covering most interior tasks, we pay attention to every detail and work with the passion to find the best solution every time. Hire us, and join to group over 100 satisfied clients.
Get in touch
Latest review:
Bathroom Fitting- 6 May 2026
Tom and team were great, from start to finish. Completed the job earlier than expected and the end result was just what we were looking for! Will definitely recommend to anyone looking for house improvements and upgrades and hope to work again with you soon!
First Class Windows,Doors and Conservatories
No reviews yet
Extension Builder in Caerphilly
Here at First Class Windows,Doors and Conservatories we are a family Buisness run by husband and wife Paul and Melanie who between them have over 60 years experience in the industry. Every job that we take on is personally looked after by Paul or Melanie to make sure you get an excellent level of customer service from the start of the project until completion. We offer free quotes and take no deposits at all and all our products come with a rock solid 10 year guarantee.
Get in touch
Elevia
No reviews yet
Extension Builder in Caerphilly
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.
Get in touch
Daves Patio & Building Services
Rating: 5 out of 5
Extension Builder in Caerphilly
Advanced city and guild bricklayer been in the building trade since I left school 38 years of experience. All aspects of building work from new builds to extensions, landscaping, renovation work and paved driveways.
Get in touch
Latest review:
Extensions- 25 Jan 2017
Dave was a friendly, professional tradesman that always turned up on time and when he said he would. Dave did a fantastic job for us on repairing some steps and matched the stonework into the original effortlessly and also a very clean worker, would highly recommend and we have already asked him to do some more work for us. thank you.
Bricksmith Limited
Rating: 5 out of 5
Extension Builder in Caerphilly
Repointing – Ensure the structural integrity of your brickwork with expert repointing services.
Get in touch
Latest review:
Bricklaying- 13 Jul 2025
Excellent completed work from Walid. Friendly, fast and polite communication with every question I asked, the work was booked in quickly and completed, and Walid even added in additional work when I asked him, with very fair pricing. I highly recommend Walid and have asked him to quote for some new work.
Tudor Construction Preservation Services Ltd
Rating: 5 out of 5
Extension Builder in Caerphilly
We are a family run business and have been trading since 1986, we carry out all aspects of construction and renovations and specialise in the sympathetic restoration of period properties. All work is carried out by our own highly skilled employees.
Get in touch
Latest review:
Damp Proofing- 12 Jan 2016
Tony and his team were superb. They assessed the work, drew up clear plans so I understood what the job entailed and completed the interior work to a very high standard. Every day they swept and mopped to reduce my workload and for the first time in my experience of builders, every last scrap of rubble was removed. A very happy customer; cannot recommend them highly enough.
Gordon Knox Joinery
Rating: 4.7 out of 5
Extension Builder in Caerphilly
I am a fully qualified Joiner with 17 years experience who has spent most of my working days on domestic projects although I have done some commercial projects. I have worked on many different aspects of joinery from building houses from start to finish to small extensions and renovations. I have experienced in a wide range of joinery aspects such as; framing, fitting windows, hanging doors, skirting and architraves, fitting kitchens and gyprocing but to name a few.
Get in touch
Latest review:
Decking- 6 Sep 2020
I am very pleased with the quality of work Gordon completed on my composite decking. He was here for three days and worked tirelessly through a very rainy afternoon. I found his communication to be excellent, keeping me up to date on materials ordered and a timescale for work to be completed. Professional, honest and friendly. I’d definitely recommend him to friends and family.
D.B Plastering and Rendering
Rating: 5 out of 5
Extension Builder in Caerphilly
a highly recommend company that as been going over 40 years. We work at very high standards, very clean and tidy. You are in safe hands with us no cowboy builders, and everything is priced and made illegal for your safety.
Get in touch
Latest review:
Plastering- 15 Jun 2017
Not met Dean before, friendly and professional manner, would recommend, happy with work completed Thank you.
T&O construction ltd
Rating: 5 out of 5
Extension Builder in Caerphilly
We are an established construction company based in cardiff. Find us on Facebook to see some of our amazing work followed by some amazing reviews. We specialise in Landscaping Bricklaying Driveways Extensions Loft conversions Garden rooms Roofing Flat roofing. Please dont hesistate to get in touch, no job is too big or small. We are fully insured and fully liscenced to carry waste.
Get in touch
Latest review:
Driveways (Paved & Loose)- 25 Jun 2025
Absolutely fantastic. The boys worked really hard all day and my drive looks like new
Extension Plans
Rating: 5 out of 5
Extension Builder in Caerphilly
Residential Extension Design & Build in Cardiff and Surrounding Areas.
Get in touch
Latest review:
CAD / Drawings- 30 Apr 2019
Shiraz is a great architect, he has in depth knowledge of the planning regulation and he supported with me till the end. He answered my queries fast, I highly recommend him.
Matthew’s Building Construction
Rating: 5 out of 5
Extension Builder in Caerphilly
Matthew's Building Services has been established since 2005, and has a vast portfolio of very happy customers. Our working area covers all over South Wales and further. We are very proud of our work, as you can see from our feedback, we are committed to our work & the customer. I will be happy to forward you a list of names and contact details for recently completed works.
Get in touch
Latest review:
Extensions- 15 Sep 2014
Shane, Ryan and Gareth made the effort of constructing my extension to a high standard. Shane, the foreman, was very punctual, methodical in his work and would not leave until he is satisfied with his work. He is the backbone of Matthew's Building Services. Matthew's Building Services is impressive and worth the wait.

Top rated Extension Builders

Our Extension Builders in Caerphilly, are rated 5 out of 5 based on 5 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 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.