Extension Builders in Carterton

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

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 Carterton

292 Results

Sort by:

AR2 Construction
Rating: 5 out of 5
Extension Builder in Carterton
We are a construction and project management company based in Oxford. With a combined 25+ years experience in the industry, we have worked in the Oxfordshire area over the last 15 year. Within our team, we have experienced volume house building through working for some of the largest house builders in the country, like Taylor Wimpey PLC. We aim to provide great customer experience, through clarity, communication and high level workmanship. We have a skilled team of tradesmen, a vast network of subcontractors & suppliers. We have completed many successful construction projects in Oxfordshire, and provide our customers savings of up to 27% through our network of suppliers. We are fully insured, and are proud member of the Federation of Master Builders. We work closely with local and private building control to ensure all legal compliance is met. We have experience from new builds, loft conversions and extensions, all the way through to internal refurbs, allowing high specification finishes to private homes and investment projects alike.
Get in touch
Latest review:
Amin and his team were extremely punctual and professional from start to finish. The quality of their workmanship was outstanding, and every detail was completed to a very high standard. They maintained excellent communication throughout the project, promptly informing me of any updates or issues and offering practical solutions. The site was always kept clean and tidy, and the whole process was smooth and stress-free. I would highly recommend AR2 Construction to anyone looking for reliable, skilled, and trustworthy builders.
Project blue construction
Rating: 4.6 out of 5
Extension Builder in Carterton
Hi, I’m Simon I own Project Blue Construction. I have been building for over 12 years doing extensions, new builds, refurbishments and maintenance. I aim to build your home to a very high standard. I have a great team of trades working alongside me so the client doesn’t have to find other trades.
Get in touch
Latest review:
Conversions - General- 23 Feb 2026
Our job was a new walk in shower with the bathroom window made smaller. Simon completed this job in 5 days to a high standard, ie: from sorting the scaffolding a supplying some materials. We can't fault Simon's work ethic. Would use Simon again
Gary Herbert Building and Maintenance
Rating: 5 out of 5
Extension Builder in Carterton
Gary Herbert Building and Maintenance We are a local family run business and have been carrying out work locally for 25 years now, our success is born out of the quality of our work and satisfied clients throughout Oxfordshire! We have vast experience In large and small House extensions as well as new build and Renovation of older properties. Garage conversions, New kitchens and bathroom projects to the highest standards are also a speciality. Our aim is quality and value for money.
Get in touch
Latest review:
Restoration & Refurbishment- 7 Feb 2019
Gary did a good job for what was quite a complex project. I appreciated his prompt responses to messages and a solutions-orientated approach! Thanks Gary!
George James construction ltd
Rating: 5 out of 5
Extension Builder in Carterton
We are new to my builder as we look to grow our current client base. Please don't let our lack of feedback put you off. We have many happy previous clients and would actively encourage you to personally come and see some of our previous work,from 90m2 extensions down to simple patios and everything in-between. We pride ourselves on our punctuality and honest approach to our work.We are fully qualified and insured, based in Wantage, Oxfordshire.
Get in touch
Latest review:
Restoration & Refurbishment- 3 Aug 2019
George, James and all their colleagues have been incredibly professional, efficient, honest and helpful over the last few weeks of renovation work on my old house that was falling apart in places. They worked on replacing all my windows, front door and French doors, as well as painting most of the house, and I couldn't be happier with all that they've done. Everything is finished to impeccable standards, I couldn't have asked for better. They were also very understanding when I had a strange request for one of the windows, and they made it happen, I got exactly what I wanted. They were very generous with regard to giving me free advice about what to do/not to do when I got the survey for the house, thereby saving me a lot on costs, for which I am very grateful. The whole team was also very understanding when I had to delay the work, and they really helped me out a lot by trying to accommodate my schedule despite their own very busy schedule. The house was in a chaotic state but they put up with it, and were very patient and kind about everything throughout the process. I couldn't have worked with a more pleasant and professional team. The house is looking great because of what they have accomplished. Given the high standards they work to, I am having them come back to do my roof in a month. I wouldn't hesitate to recommend George, James and their whole team to anyone looking for the best professionals who will treat their client's house with the greatest care and respect.
J.Whitaker
Rating: 5 out of 5
Extension Builder in Carterton
Hi, I'm Jason and I have been in the trade for over 23 years. Extensions, renovations, stonework and landscapes are my specialty. I have a small loyal team behind me including electricians, heating engineer's and plasterers. Between us all we have traveled most of the country carrying out big jobs to small one offs jobs. I can give reference details and photo evidence of all my past work.
Get in touch
Latest review:
We recently completed a 7 month build with Jason and were extremely pleased with the level of commitment and high standard of finish. We would highly recommend Jason and his team. They were very accommodating when working around our family life and nothing was too much trouble.
S N Gamble
No reviews yet
Extension Builder in Carterton
I have been a bricklayer for 38 years, building houses and extensions in natural stone and brick. I am also happy to carry out smaller works to include garden walls, patios and repointing.
Get in touch
Frame & Finish
Rating: 5 out of 5
Extension Builder in Carterton
We are an Oxfordshire based company with a wealth of experience and a keen eye for detail. Over the years we have worked on various projects that have included sympathetically renovating period properties to constructing new build properties with modern touches. We pride ourselves on our professional and collaborative approach to every project in order to achieve our clients vision, either directly with the client or through a main contractor.
Get in touch
Latest review:
Carpentry- 25 Feb 2021
Hiring Kyle for our project was the best decision we made. We had undertaken a self build and Kyle acted as both our site foreman and an experienced chippie. He helped us build a unique house even though there were a lot of logistical challenges.I would not hesitate recommending Kyle to anyone he's an extremely diligent and professional carpenter who has great attention to detail.
R&S Building Services
Rating: 5 out of 5
Extension Builder in Carterton
I believe in honest quotes and discussing the needs and requirements of my customer, and am happy to advise as well as "do". I have a very strong work ethic and take great pride in my work, if need be I will work weekends to fit around my customers.
Get in touch
Latest review:
Efficient, friendly, professional. And no radio was played! Everything done to agreed time, and good cleanup.
Kaci construction ltd
Rating: 5 out of 5
Extension Builder in Carterton
Kaci Construction High quality of work, Good Manners, Work done on time, Happy customers
Get in touch
Latest review:
Bathroom Fitting- 16 Jul 2023
I am so grateful to Kaci, he called out to my property in the early evening to view the job, took detailed photographs and we had discussions about the job, what was needed, price and start date. Kaci turned up on time, fixed the leak and completed all the repairs within three days. Kaci is polite, hard working, got stuck into the job and didn't waste any time, he can turn his hand to most trades and if he can't, he knows a man who can. Reliable, reasonable and kept me informed of progress. I would certainly recommend Kaci and would definitely use him again. Very pleased, Karen
Norris Carpentry and Building Services
No reviews yet
Extension Builder in Carterton
We are a family run buisness with decades of experience. We cover all aspects of construction from extensions and full renovations to smaller jobs. We cover all trades and can offer a whole job in one package. We always keep the clients expectations at the heart of every job big or small and provide nothing but the highest quality service with a friendly approach.
Get in touch
A&A Building Construction LTD
Rating: 5 out of 5
Extension Builder in Carterton
We are passionate about delivering service and quality to all our customers whether it is a large project or a small maintenance job. This basic philosophy has achieved c ontinued customer satisfaction and resulted in continual referrals from our satisfied customers.
Get in touch
Latest review:
Extensions- 17 Feb 2020
Arthur and team took over our extention and full house refurb that another cowboy builder had completely messed up and corrected everything according to plans the correct way
Lines’ Landscapes
No reviews yet
Extension Builder in Carterton
I have been doing general building and double glazing for the last 10 years and picked up landscaping within the last 5. I am perfectionist and I aim to please. I’m willing to travel within a 20 mile radius. Very friendly and easy going. Feel free to ask for my references.
Get in touch
S M DANCEY
No reviews yet
Extension Builder in Carterton
I am a multi trade builder in brickwork, carpentry, ground work, over 30 years experience,
Get in touch
P r tiling ltd
Rating: 5 out of 5
Extension Builder in Carterton
Hello everyone, Firstly my name is Paul Rozycki. For the last 20 years I’ve been involved in many aspects of tiling, carpentry and wet room/bathroom installations across Wiltshire and throughout the Cotswolds. I have been fortunate enough to have never needed to advertise throughout this period. The last 10 years I have been solely focused on what I referred to as my bread and butter working at The Lakes by Yoo in Lechlade. Unfortunately this work has sadly come to an end and so have decided to change direction in my approach to acquiring work. If I were to describe myself I would say I’m a specialist in wetroom installations, standard tiling and specialist tiling, including large format, all types of stone etc I have many years experience in general carpentry as well as plumbing and general building works. I’m very approachable, offering my clients my knowledge and expertise to achieve their visions to the highest of standards. I’m more than happy to provide images of my previous projects and references from my clients, as well as offering a free visit and quotation for any potential works.
Get in touch
Latest review:
Tiling- 26 Sep 2025
Fantastic work. Was not an easy build but Paul and team always came up with efficient solutions helping with all elements of the job. Great finish too!
L&D plastering
Rating: 5 out of 5
Extension Builder in Carterton
We are independent company we have 25 years of experience in building industry we deliver high quality work a full house refurbishment, we do extensions, we do loft conversions we work closely with architects and designers to create the best possible build
Get in touch
Latest review:
Extensions- 11 Jan 2023
Excellent service and worksmanship. Very happy with the finished project. They were a delight to work with. Happy bunch and communicated throughout the project, I highly recommend lulzim for any building and construction needs. Will definitely be using him again.
To the line
No reviews yet
Extension Builder in Carterton
Dear customer, Allow me to introduce myself and my business. My name is Jack and i am the founder of ‘ To The Line Builidng`. Our company specialises in garden renovations and hard-scaping. At To The Line we are committed to providing high quality building services to our customers. Our team consists of experienced professionals in all fields including: Bricklaying, Ground works and foundations, Hardscaping, Extensions and plastering. All of whom are dedicated to delivering exceptional results. We cover all of Oxfordshire but are willing to travel further.
Get in touch

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

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

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

What are the hourly rates of extension builders in Carterton?

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

Find extension builders in Carterton with MyBuilder

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

Step 2: Compare different extension builders in Carterton

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

Step 3: Hire Carterton extension builders with confidence

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

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

What to ask a Carterton extension builder before hiring?

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

An extension builder in Carterton 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 Carterton 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 Carterton?

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 Carterton 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 Carterton 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 Carterton

Can an extension builder in Carterton help with planning permission?

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

Many Carterton 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 Carterton help with materials and finishes?

Yes, most extension builders in Carterton 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.