Extension builders in Barnes

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.6 (19 reviews)

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

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 Barnes

3657 Results

Sort by:

Ed’s loft conversions Ltd
Rating: 5 out of 5
Extension Builder in Barnes
We specialise in loft conversions, Extension to a complete house refurbishment.
Get in touch
Latest review:
I engaged Edi to work on a full renovation and refurbishment of a 4 bedroom detached house with front and back gardens on Blackheath’s Cator Estate. Edi did an extensive amount of work, including stripping out; plumbing; plastering; windows installation; carpentry; and decoration. In addition, after commencing the property work, once the scaffold had been erected, following sensible advice, Edi and his team replaced the roof and fully insulated the attic; fitted additional electric points; rebuilt the garden patio; and replaced the flooring throughout, in addition to other important jobs including re rendering and pointing of chimneys, building new wardrobes in the main bedrooms; and upgrading the radiators. A new kitchen, and two new bathrooms have been fitted. The kitchen redesign meant knocking through a wall with the lounge to create a larger space. Edi is a highly skilled craftsman, who thinks creatively as he works to make best use of the space, including shelf fittings, and additional lighting for example. He has built some beautiful wardrobes, and the internal decorations have brightened up what was previously a rather shabby looking house. In addition to the above, I wish to commend Edi for his professionalism, courtesy, and passion for doing the best work possible. On all the site visits I attended, and every time I spoke with him on the phone, it was striking how much he cared about the work that he was doing, his desire to ensure that the house would look the best. I always left site visits with the feeling that he cared so much about the house that he could be safely relied on to give the best advice to enable us to make the right decisions. I also noticed that Edi and his team would take the upmost care to keep the property safe, tidy and in good shape throughout the project. He can be fully trusted to look after any site he works on. He is intelligent and careful when it comes to safety and security. It has been a pleasure for Edi and his team to work with us over a period of around 6 months, and he did so much to reduce the stress of a significant project so that we could always rely on him to work methodically, patiently and sensibly, and to make best use of the resources available. His pleasantness shines through, and everyone I know who has spoken to him has always provided me with the most positive feedback I have no hesitation in recommending Edi to anyone who wishes to engage him for future projects, and is most deserving of the good words that I and others that work with him have to say about him.
DRS construction
Rating: 5 out of 5
Extension Builder in Barnes
we are builders who construct the dreams of others. we have the experiece as cscs skill worker about 5 years now doing our own work contact us if you want to get good work experience
Get in touch
Latest review:
Plastering- 23 Sep 2025
These guys are superb. Came to look at the job, quote & arrange a start date. Friendly and polite at all times. Knowledgeable about best techniques to use. Arrived early, worked till late to get the job done in good time and to great standard. Kept to their quoted price. Highly recommend
Lazur Design Ltd
No reviews yet
Extension Builder in Barnes
With over 25 years of experience serving South West London, we are a trusted and professional building services company committed to delivering high-quality workmanship and reliable service. We specialise in a full range of building and maintenance services, including:
Get in touch
NICER LTD
No reviews yet
Extension Builder in Barnes
We are a reliable and professional Chinese building team based in London, specialising in residential renovation and property improvement work. Although we are new to MyBuilder and do not yet have reviews on the platform, we have completed a wide range of projects for homeowners and landlords across London. We are happy to arrange viewings of previous completed work for peace of mind. We understand that good communication, reliability, and keeping to budget are just as important as the quality of the work itself. We take pride in being: • Punctual and hardworking • Clean and respectful in customers’ homes • Transparent with pricing and quotations • Efficient without cutting corners • Focused on delivering a professional finish We cover all aspects of home improvement, including bathrooms, kitchens, flooring, decorating, carpentry, and general building work. Our aim is simple — to provide dependable workmanship at a fair price and make the process as smooth and stress-free as possible for every customer.
Get in touch
QUOTRIX CONTRACTORS & ENGINEERS LTD
Rating: 5 out of 5
Extension Builder in Barnes
1. Design and Planning; 2. Development of residential & commercial buildings; 3. Refurbishment & Renovation of domestic building projects, and 4. Any other types of building works including extensions and conversions.
Get in touch
Latest review:
Kitchen Fitting- 4 Aug 2020
Quotrix contractors did a fantastic job of kitchen refurbishment. Great friendly service by all of the team, from the sales through to installation. Brilliant job, all round!
DF Construction
Rating: 5 out of 5
Extension Builder in Barnes
DFGC are commercial and residential refurbishment specialists. We've created partnerships with high profile companies to complete large scale projects, in the South East of England - shown on my profile. We are known for a wide range of undertakings, from complete refurbishments, extensions, bathrooms, driveways, to name a few. There's very little we can't do, with regards to construction. We're a one stop shop for all your construction needs - we can take your vision and make it a reality.
Get in touch
Latest review:
Extensions- 13 Dec 2021
Couldn't recommend Domi & Emile enough. They have great building knowledge and kept us informed and up to date throughout the whole building process. The job was finished to a high standard and they even came back free of charge to tie up a few snags a few weeks later. Great builders and a great team!
LJS construction
Rating: 5 out of 5
Extension Builder in Barnes
Extensions, lofts, kitchens, refurbishment, driveways and patios
Get in touch
Latest review:
Landscaping- 6 Jun 2023
We are so happy with our new patio and garden. They were on time, very helpful and did a fantastic job, for a very competitive price. We will definitely use LJS for any future projects.
B&D Construction London Ltd
Rating: 5 out of 5
Extension Builder in Barnes
Hi Our company undertake jobs ,Loft Conversion, Extensions, Carpentry, Gardens, Plumbing/Electrical , Plastering and Decorating,
Get in touch
Latest review:
We’ve had multiple jobs done by Silviya. The first was a small extension and downstairs and partial upstairs refurbishment with new kitchen and 2 bathrooms fitted. This large job was completed within 16 weeks and looks exactly as we hoped. Given the extent of works we moved out for the build. The second was the construction of an outbuilding and garden redesign (patio and astro fitted). Again the results are great. We lived in during this project and I worked from home without disturbance. The latest has been the re-fit of new windows, front door and fixing the front render. Again, the results are very professional and minimal disturbance while the work took place. Will definitely use him and his team again, should we need any more building work and recommend them to others
Reon construction
Rating: 5 out of 5
Extension Builder in Barnes
we r reliable, honest and hardworking people team in which everyone has more than 16 years of experience in every field of construction site..we r spot on in our work and always give our 100 percent to make it good and attractive.our work speak before we do..always feel free to contact us...
Get in touch
Latest review:
Bathroom Fitting- 17 Mar 2022
I have seen many tradespeople in my lifetime and they claim to be master of all trade …..but none that I know…until I met Davinder he is so meticulous in everything he does and today he has finished my bathroom to standard that Is over my expectations….. I will definitely recommend him to my family and friends
Lto construction
Rating: 5 out of 5
Extension Builder in Barnes
We are a family run building company with years of experience. We fully commit ourselves to each and every project and try our hardest to exceed our clients expectations.
Get in touch
Latest review:
Bricklaying- 23 Oct 2018
Tony and his team were phenomenal! Professional, courteous, reliable, tidy and quick. Tony's communication throughout the build was consistent, clear and precise. Tony really listened to me throughout the process; provided advice and options but most of all completed the project the way I needed it. The whole build went exceptionally smoothly, was finished ahead of schedule and on budget. Tony's workmanship is excellent and the final finish spot on. I was really worried about finding the right builder for my project... I simply could not have found better. I got several quotes from different providers and Tony's represented the best value for money. I highly recommend Lto builders, you will not be disappointed.
Maxcontractorsint.LTD
Rating: 5 out of 5
Extension Builder in Barnes
At MaxContractors , we pride ourselves in providing our customers with quality construction services that are tailored to their needs. Our team is highly experienced in the industry and have a great deal of knowledge when it comes to building and renovation. We pay attention to detail and are always willing to go the extra mile to ensure that the job is done to the highest standard. Over the past many years our company has thrived within the domestic as well as commercial building industry. With vast amounts of staff specialising in all areas of the trade, our tradesmen/women boast skill and determination many could only wish of. Having completed thousands of projects, putting smiles on countless of faces we aim to deliver the highest of standards in all aspects of the works and services. Providing quality and great time management throughout each step of this journey. We stand strong beside our clients providing a helping hand so ideas become reality, all while with a peace of mind you kick back and watch your future grow. maxcontractorsint. com
Get in touch
Latest review:
We recently completed a first and second floor renovation alongside an 5x6m extension of our 1930s property with Maxcontractorsint.ltd , and we couldn’t be happier with the results. From start to finish, they have been absolutely fantastic. The attention to detail and the quality of workmanship throughout the project has been exceptional. Matt and his team are incredible, they worked efficiently, kept work on track, and made sure we were updated and involved at every stage. Their skills, ideas, and collaborative approach truly brought the whole project together. Communication throughout the project was good, and the team provided great pre and post project support. Matt was very detail-oriented, offered inspiration during site visits, and was supportive of our requests along the way. We’re so happy with the end result and would absolutely recommend Maxcontractorsint.ltd for any project.
SGB Water Engineering
Rating: 5 out of 5
Extension Builder in Barnes
SGB maintain an interactive IT process, to ease transparency and movement of information data, to all parties involved in any one project. We have a combined 25 years professional experience in the civil engineering / construction management. We are experts in water utilities management enabling us to offer a variety of services and solutions in this area.
Get in touch
Latest review:
Plumbing- 9 Dec 2020
Work completed and problem has been resolved .
Timeless finishes ltd
Rating: 5 out of 5
Extension Builder in Barnes
With over 15 years in the construction industry, I have honed my expertise in managing both domestic and commercial projects. I thrive in high-pressure environments, where my skills in project management and quality assurance lead to successful, on-time project completions. I'm dedicated to sustainable practices and mentoring upcoming professionals in the field.Leading construction firm specializing in both residential and commercial projects. Managed multiple construction projects, overseeing budgets and ensuring projects were completed on time. Implemented quality control procedures that led to a 20% reduction in rework. Coordinated with subcontractors and suppliers to maintain project flow efficiently.Construction company focusing on residential buildings. Conducted site assessments and prepared reports on project feasibility. Supervised daily operations on site, ensuring adherence to safety standards. Fostered relationships with clients that resulted in repeat business
Get in touch
Latest review:
Carpentry- 30 Dec 2025
Did the skirting across the whole house and the wood paint. Did a really good job! Would recommend.
First Choice Builders
Rating: 4.8 out of 5
Extension Builder in Barnes
Christopher Graham -Level 1,2,3 in Bricklaying Trowel Occupations. -NVQ Level 1,2,3 -Professional Development Diploma in Historic Building Conservation and Repair -Stone and Brick Repair for Historic Building Restoration -Building and Pointing with Lime Mortar In 2010 I started up First Choice Builders and haven't looked back since. Taking on all Bricklaying works, Fully Qualified with 15+ years experience. Have done extensive courses on Repointing and Brick Restoration. Mastering Tuck, Weatherstruck, Flush and all other types of pointing. Top quality brickwork guaranteed. Also have tower scaffold £150 per week hire. Which should save on getting a proper scaffolding which is a minimum of around £400. Please give me a call for a free quote.
Get in touch
Latest review:
Repointing- 14 Sep 2026
Booked the job then disappeared
ASC
Rating: 5 out of 5
Extension Builder in Barnes
Plumbing & heating — full professional range ASC HEATING & PLUMBING is based in London and works across London and the surrounding areas. With 6+ years in business, we offer everything from emergency call-outs and repairs to installations, leak detection, drains, bathrooms, boilers, central heating, underfloor heating and commercial plant rooms — planned so you know scope, timescale and cost up front.
Get in touch
Latest review:
Plumbing- 1 Apr 2026
Aurel and his son did a great job, really knowledgeable and helped with a difficult job. Not only were the results fantastic but the guys were a pleasure to have around.
INTERSTAR BUILDING CONTRACTORS LTD
No reviews yet
Extension Builder in Barnes
Interstar Building Contractors was formed in 2005 with over 20 years of experience in supplying to quality services to the UK Construction industry. Our Staff have extensive knowledge of working within the Capital, and pride themselves on producing a top quality finishing within agreed time frames. We work extensively throughout London and South. For almost 10 years we have offered a wide range of construction services in London. We strive to maintain the highest standards while exceeding client’s expectations at all levels. We not only honor commitments, but we are known for meeting though deadlines while delivering nothing but the best. We aim to create a responsive client relationship that allows us to meet and even exceed the goals of each of our projects.
Get in touch

4.6

Top rated Extension Builders

Our Extension Builders in Barnes, are rated 4.6 out of 5 based on 19 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 Barnes?

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

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

What are the hourly rates of extension builders in Barnes?

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

Find extension builders in Barnes with MyBuilder

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

Step 2: Compare different extension builders in Barnes

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

Step 3: Hire Barnes extension builders with confidence

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

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

What to ask a Barnes extension builder before hiring?

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

An extension builder in Barnes 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 Barnes 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 Barnes?

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 Barnes 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 Barnes 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 Barnes

Can an extension builder in Barnes help with planning permission?

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

Many Barnes 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 Barnes help with materials and finishes?

Yes, most extension builders in Barnes 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.