Extension Builders in Barnes

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (18 reviews)

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Some of our top rated extension builders in Barnes

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Ava Constructions & Decors
Rating: 4.9 out of 5
Extension Builder in Barnes
Ava Constructions & Decors Ltd is a UK-based construction and renovation company committed to delivering top-quality craftsmanship and reliable project management. We specialise in full refurbishments, extensions, bathroom and kitchen installations, and commercial fit-outs — always tailored to the client’s vision and delivered to the highest UK building standards. With a keen focus on transparency, timelines, and customer satisfaction, Ava Constructions has earned the trust of homeowners, investors, and developers alike. Punctuality and completion of work on time are a priority .Our team always respect the client wishes and work with them to achieve the best possible results to their satisfaction. Thank you in advance
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Latest review:
Extensions- 16 Apr 2026
I would not recommend this builder based on my experience. Instead of using crushed concrete they used soil to fill the house flooring for underfloor heating. 1 The project suffered from poor communication, repeated delays, and a lack of clarity around responsibilities. There were serious issues with the foundation works, which failed Building Control inspection and now require remedial engineering input before works can proceed. The site was also left incomplete and not in an acceptable condition. Despite substantial payments being made, key documentation, technical responses, and follow-through were lacking, leaving me to resolve major compliance and structural issues independently. My experience has resulted in delay, additional cost, and considerable stress. I would strongly advise others to ensure there is a detailed written contract, clear scope of works, and defined accountability
Kalafuldeco
Rating: 5 out of 5
Extension Builder in Barnes
❌ We Turn Houses Into Kalaful Homes ❌ 350+ REVIEWS / 5 STAR RATING X⭕️X - WE'LL MATCH ANY REASONABLE QUOTES - X⭕️X Hi, This is Cristina in The Office. We Specialise in Flooring / Painting Int / Ext Building Services - Kitchens / Bathrooms / Lofts / Extensions.etc +£25 Each - Plane / Trimming Doors if required +Removal £50 - £75 Each Room + Disposal £100 - £300 If Required FLOORING ESTIMATES / WE ALSO DO PAINTING Fitting Beading / Scotia is Free, Inc in the Job Fitting Skirting is Min £200+ / Hallway Min £250+ Kitchen / Bathroom Min £200+ Laminate / Lvt Click ( Sub Floor Must be Reasonablly Level ) Straight Runs - £20m2 / Inc Hallways £25m2+ MIN £100 UPTO 5m2 Engineered Click Straight Runs - £25m2 / Inc Hallways £30m2+ MIN £150 UPTO 5m2 Hardwood T&G / Tongue & Groove Straight Runs - £30m2 / Inc Hallways £35m2+ MIN £200 UPTO 5m2 Herringbone - £40 - £45m2+ Cash Deals + 20% on Bank Transfer or if Invoice is Required - Payments To be Made End Of Each Day ❌ Must be Able to Provide Off Street Parking / Permits as The Crew Needs Access to The Vehicle at all Times. Thanking you in Advance Christina & Kam @ Kalaful Deco PAINTING ESTIMATES PAINTING ONLY - NO WALLPAPERING We also do Flooring / Gardening / Man & Van + Handyman Jobs Single Room - £300 Inc Minor Filling & Sanding / All White ) + £75 / 2 Colours / Woodwork £50+ £150 Extra To Paint on Fresh Plaster Living / Double Room - £400 Inc Minor Filling & Sanding / All White + £75 / 2 Colours / Woodwork £50+ Hallways- £450 - £750 Inc Working around 4-8 Doors Thanking you in Advance Christina & Kam @ Kalaful Deco
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Latest review:
Hard Flooring- 28 Jun 2026
Excellent, great advice and hard worker. Assisted all day and gave me good knowledge on laying the floor. He did a great job and a happy worker. Loves his job.
Builder
Rating: 5 out of 5
Extension Builder in Barnes
Hi we are specialize in all type of plastering and decorating thanks
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Latest review:
Plastering- 3 Jul 2026
Did a high-quality fabulous job
Tota Spark Ltd
Rating: 5 out of 5
Extension Builder in Barnes
Hi there.I have established this company because I like the work I do and the most important thing is that I want that every client to receive the best of service.I undertake electrical work and general building works.
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Latest review:
Electrical- 10 Sep 2019
Nice, trustworthy guy. Quick reply and on time. Will definitely call again next time I need an electrician.
Daniel Petka
Rating: 5 out of 5
Extension Builder in Barnes
We are a small team mainly specialize in extensions.All kind of roof work. Plumbing. Bathrooms. Tiling. 1st and 2nd Fix carpentry i.e doors, kitchens, flooring etc.
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Latest review:
Kitchen Fitting- 20 Apr 2019
Good communication... Good job... Good price.. On time and clean.. Will definitely use again.. Thank you Daniel.
GGS Brickwork
Rating: 5 out of 5
Extension Builder in Barnes
I have always been a very conscientious worker and enjoy what i do.
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Latest review:
Bricklaying- 17 Aug 2018
Lovely guy-good job, always kept me informed about when he was ģoing to appear, tidy and interesting to talk to!
Alexi Construction Ltd
Rating: 5 out of 5
Extension Builder in Barnes
At Alexi Construction, we take immense pride in being your trusted partner for a wide array of high-quality property solutions across the UK. Our commitment to delivering perfection to your proposition and exceeding all expectations is at the core of everything we do.
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Latest review:
Great work from start to finish, Suren was professional, reliable, and delivered high-quality service on time and on budget. Communication was clear throughout the works, and the final results exceeded expectations. Highly recommend Alexi construction to anyone looking for real quality work.
Embury ltd
No reviews yet
Extension Builder in Barnes
We're a family-run construction company based right in the heart of Richmond, and we're passionate about helping you transform your home or workplace. Whether it's residential or commercial projects, we love bringing your vision to life. With 30 years of experience, we're proud to be ISO approved and a trusted SafeContractor, and we can’t wait to bring our expertise to your next project. We handle everything from design to the final, turn-key finish, making sure your project is smooth from start to finish. Our specialties include bespoke carpentry, extensions, loft conversions, kitchens, bathrooms, and decorating—all tailored to your style and needs.
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TA Bhatti constructions Ltd
Rating: 5 out of 5
Extension Builder in Barnes
Right now we r doing flats,extensions, loft conversion, refurbishment, bathroom & toilet, kitchen electric & plumbing , rendering, decorating, driveways work undertaken
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Latest review:
TA Bhatti constructions did an excellent job in renovating my house, it was a 6 months long job where they pulled apart all the internal parts of the house and rebuilt it all. They did an excellent job in putting a new Kitchen, 2 bathrooms, new wiring, new plumbing and everything else. The thing I liked most was their finishing which was next to none. I will happily recommend TA Bhatti constructions to anyone looking to renovate their house or looking to do extensions or Loft conversion.
Bros con limited
Rating: 5 out of 5
Extension Builder in Barnes
experience in both commercial and private property renovations specializing in Extensions, House refurbishment, Loft and Garage conversions, Driveways and Patios. Please get in touch for a friendly free-of-charge no obligation consultation. Many thanks, Teodor
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Latest review:
I received quotes from multiple builders to build a garden office, and choose Teodor as he provided the best quote. His workmanship is top quality and he built me a fantastic garden office which I am enjoying immensely. Teodor was very professional and reliable, keeping me involved throughout the whole project. I will be using his services again in the New Year and can wholeheartedly recommend Teodor.
provilla limited
Rating: 4.9 out of 5
Extension Builder in Barnes
Our company provides a complete construction service to both public and private sector. We proud ourselves with our Customer focus approach understanding our Client's needs and being proactive involved in all matters of our projects large or small.
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Latest review:
Bathroom Fitting- 14 Oct 2013
overall did a good job for the price i paid. was fast and courteous. they were the cheapest quote i got and i am happy with everything in the end.
Dominant construction ltd
No reviews yet
Extension Builder in Barnes
Dominant Construction is a customer centric integrated building company specialising in home renovations, loft and basement conversions, and kitchen extensions. With over a decade of experience, we have designed our processes to ensure that our clients projects run smoothly - always on-time and always on-budget. We keep clear lines of communication at all times to make sure projects are collaborative and executed with our client's needs at the forefront.
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Swift Building Masters
Rating: 4.9 out of 5
Extension Builder in Barnes
General Builder of over 40 years Experience. Carpentry & Joinery Background. I have worked on large and small Projects, Repair, Refurbishment, Extensions, Loft conversions and New-builds. Recently become a member of Federation of Master Builders. ALL WORK QUALITY ASSURED
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Latest review:
Extensions- 5 Nov 2016
Leslie carried out the following works: chemical damp injection to walls on rear extension, reroute down-pipe, repair fracture on rear wall, install gutter hedgehog. Hopefully, this will resolve some of the issues we had with damp, a blocked down-pipe and an overflowing gutter. Leslie arrived on time on the first day but was delayed a few hours the next day. However, the work still was done within two days as expected. Thank you!
Fixtrope Construction Ltd
Rating: 5 out of 5
Extension Builder in Barnes
Fixtrope Construction Ltd is a family-run building company with over 15 years of experience in the industry. We specialise in all aspects of carpentry, extensions, loft conversions, new builds and refurbishments. Our experience team work closely with customers to find the best solution for their project. Whatever the size of the job we undertake, we make sure it completed to the highest standard.
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Latest review:
Carpentry- 23 Aug 2019
Roman was great to work with. He took the time to talk the project through thoroughly and delivered on what was discussed. overall very clean quick and friendly. hope to work with him in the future again.
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.
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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.
Mels Construction Solutions
Rating: 5 out of 5
Extension Builder in Barnes
Welcome to Mel’s Construction Solutions, specialising in loft conversions and house extensions. With 15 years of experience, we have gained extensive knowledge and expertise in providing top-quality services to our clients. We offer full building services for Loft Conversions Extensions Refurbishments Bathroom and Kitchen instillations All our work is guaranteed and done to the highest standards with competitive prices given.
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Latest review:
I would highly recommend Meli and use his service again. He is reliable, friendly and extremely personable. Meli saved time and cost by explaining what could be done better. Very talented all rounded experience. He’s a great contractor and I am very satisfied with his work. Thank you Meli!

4.1

Top rated Extension Builders

Our Extension Builders in Barnes, are rated 4.1 out of 5 based on 18 reviews from customers like you.

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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.