Extension Builders in Clapham

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (21 reviews)

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Some of our top rated extension builders in Clapham

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Mf General Builders ltd
Rating: 5 out of 5
Extension Builder in Clapham
I am starting to develop my business, I have been a builder in London for 15 years, I specialize in assembling kitchens and bathrooms, but I can do a lot more if needed
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Latest review:
Kitchen Fitting- 18 Mar 2025
Excellent service! The technician quickly fixed our cabinet door under the sink with great attention to detail. Professional, efficient, and very friendly. Highly recommended!
URBAN SPACE BUILDING & PLUMBING LTD
Rating: 5 out of 5
Extension Builder in Clapham
We are a well-established local building company with professional tradesmen. We specialise in all aspects of residential building works and refurbishments such as bathroom, kitchen & full refurbishments, as well as loft conversions & extensions. We have an in house team of experienced and professional tradesmen with skills to complete any project to high standards, on time and within budget. All our work is guaranteed, and we are happy to supply references on request.
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Latest review:
Extensions- 19 Apr 2021
Michael and the team were really enthusiastic and professional throughout. The standard of finishes throughout the project is really high and the guys went the extra miles to get the project finished on time. Michael has also been great with coming round to sort any "teething problem" promptly and helping out with some follow up works.
WHG Consultancy Ltd
Rating: 5 out of 5
Extension Builder in Clapham
Award winning builders in South West and Central London. We offer a complete range of design and build services for residential and commercial customers include new build developments, renovations, refurbishments, reconfigurations, extensions, bathroom and kitchen fitting, as well as bespoke carpentry, joinery and electrical work. We think your property is as individual as you are and help you to achieve your ideal home through our highly skilled & experienced team of designers and builders.
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Latest review:
Restoration & Refurbishment- 28 Dec 2015
I did quite a bit of research before choosing Battersea Builders. They didn’t come in with the cheapest quote but I never base my choice on price alone. And it wasn’t miles above the other quotes I got. Instead, I chose them because they ticked a lot of boxes including a) good independent reviews, b) a dedicated PM, c) qualifications, d) quick responses, e) a decent website etc. Overall, they did a fantastic job. The quality of the work and finish is really good. The PM, Tommy, was really helpful throughout and the team was very polite and conscientious. They were also on site every day as promised and didn’t play that old builders trick of getting the job and then going offsite to secure another job elsewhere (resulting in the deadline being missed). Was it perfect? No, but then not many projects are. I have a few minor comments including the fact there was a misunderstanding about the quality of bathroom cupboard I needed so the original quote was insufficient and costs had to be increased half way through the project. Despite this issue, Tommy did his best to keep the extra costs down. One other niggle was that I asked them to keep all the manuals and instructions for all the fittings but they threw them out. Not a big deal but quite annoying. Overall, it wasn’t cheap but I would use them again because the work was done to a high standard and the team were a pleasure to work with.
Martin
Rating: 5 out of 5
Extension Builder in Clapham
EAGLE UNIT CONSTRUCTION LTD WE ARE THE PERFECT COMPANY TO MAKE YOU HAPPY WITH YOUR HOME MAKE YOUR CHOICE NOW
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Latest review:
Painting & Decorating- 18 Sep 2022
Martin is a very attentive, multi skilled and thoughtful worker. His quote is accurate and honest. Most builders I have hired in the past offer a better price but then there is almost always additional 'hidden' costs. Martins work is thorough and works to completion. I would always hire Martin for a complete honest job knowing that I will get what I pay for. I would highly recommend him.
A. plastering
Rating: 5 out of 5
Extension Builder in Clapham
Hi. My name is Fatos. I have been in construction for over 17 years. We undertake rendering, plastering and painting jobs. High standard finish in very competitive prices. We also do loft conversion,roofing, plumbing, electric, tiling, extension ect. Our prioritie is to get the job done in very high quality
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Latest review:
Plastering- 22 Oct 2024
We needed to plaster our house ASAP and Fatos completed it in a short time. The house looks amazing, he was quick, efficient and was a great communicator. I would highly recommend him.
Muhsin
Rating: 5 out of 5
Extension Builder in Clapham
Bathroom & Property Renovation Specialist Hi, I’m Muhsin, an experienced builder specialising in bathroom renovations, tiling and general property refurbishment. I provide a professional and reliable service, with attention to detail and a clean finish. I can help with both smaller jobs and complete renovation projects. Services I offer: - Bathroom renovations - Wall and floor tiling - Shower tray installation - Waterproofing and tanking - Grouting and silicone sealing - Removing and replacing old tiles - Flooring, laminate and parquet - Plastering and preparation - Painting and decorating - Door installation - General property refurbishment I can also help with preparing the work, sourcing materials and coordinating different trades when required. I work to a high standard and always discuss the job and price clearly before starting. If you have a bathroom, renovation or tiling project, feel free to get in touch. I’m happy to arrange a visit and provide a quote. Reliable service • Quality workmanship • Clean finish
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Latest review:
Handyman- 12 May 2025
Muhsin was amazing! He came and did exactly what we wanted and more! He was very friendly, came on time and was a perfectionist. We’ve even hired him to do more in our home as he’s don’t a very good job! Highly recommend.
Aquaspark ltd
Rating: 5 out of 5
Extension Builder in Clapham
We are plumbing, Heating and general building company based in south west London. We are fully GAS SAFE qualified and fully INSURED. Expert in all makes of Boiler repairs and installation. Carry most of the parts in van to fix then n there to avoid cost to client. we work on Very REASONABLE COST AND ALL our work is GUARANTEED. Under floor heating Central heating Bathrooms Gas safety inspections AS A VAILLANT APPROVED CONTRACTOR WE OFFER UP TO 10 YEAR GUARANTEE ON NEW BOILERS
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Latest review:
Gas Work- 6 Feb 2019
Gajraj from Aquaspark provided a very prompt and professional service. He was quite pleasent to speak to, and explained me the problem and solution in detail. He fixed my fireplace and cleaned up after completing. Really please about the overall experience.
Muhammad virk
Rating: 5 out of 5
Extension Builder in Clapham
We undertake all kind of work. And our priority is to provide quality work
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Latest review:
Restoration & Refurbishment- 1 Mar 2023
Mohammed was very helpful and understanding I was very impressed about his work
MAF Contacts
Rating: 5 out of 5
Extension Builder in Clapham
Hello, My name is Dan Maftei, Founder of MAF Contracts ltd. MAF offers a range of services like demolition( stripping out), Plumbing, Electric, Rendering and Plastering, Painting and decorating, Tiling, Flooring, Carpentry first fix and second fix, Paving, Roofing, extension and Loft conversion. We can deal with big projects as well as small ones. Thank you, Dan Maftei
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Latest review:
Restoration & Refurbishment- 29 Dec 2018
Amazing work. A job very well done. Very hardworking people and high quality work. All was delivered exactly as agreed in time and to perfection. Thank you again for transforming my flat in such a lovely space.
CM Building LTD
Rating: 5 out of 5
Extension Builder in Clapham
At CM Loft Conversions, we specialise in luxury loft conversions, home extensions, and full refurbishments for both residential and commercial properties across London. Our dedicated team is renowned for transforming spaces with unparalleled craftsmanship and meticulous attention to detail. Whether it’s a high-end home, a modern office, or a commercial property, we deliver projects that elevate both form and function. By seamlessly blending design innovation with practical solutions, we ensure every project not only enhances the aesthetic appeal of a space but also maximises its value and usability. At CM Loft Conversions, we are passionate about creating bespoke spaces that reflect the unique needs of our clients. From concept to completion, we focus on the fine details and provide a smooth, stress-free experience. Whether you’re looking to transform your home, expand your business premises, or refurbish a commercial unit, our team is committed to delivering results that exceed expectations.
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Latest review:
I met Charlie and his team from CM Builders Ltd when they were completing a loft extension and ground floor extension for one of my neighbours. Quotation and budget I was given an estimate subject to drawings as I was on a strict budget that I had to keep to for the build. Charlie was able to help me keep to the budget, both at the final agreed plan and during the build. The project was complex in that whilst it was a loft extension, all of the house was rebuilt. The only thing kept was the external walls and first floor rafters. Whilst the footprint of the first floor was not being changed I wanted to bring it up to current building standards with extra insulation. All of the plumbing and electrics were also replaced including a new boiler. The overall build has come in on budget, save for agreed enhancements that I did not think of at the planning stage and or building regulations such as double ceiling fire plaster boards. There were also items such as the original stairs that I wanted to keep, but Charlie was able to increase the height space in the kitchen making the worktop much more usable for tall people for a larger part of the kitchen. These were suggested to me as potential options as part of the build. Stage payments The stage payments have all been sensible throughout the build and linked to the ongoing work schedule. I have not therefore had any concerns in this regard. Quality of work This was a very complicated build as unlike the ground floor the first and new second floor are “L” shaped. The new 2nd floor included an en-suite and 2 bedrooms. Overall the house has been increased from 2 bedrooms 1 bathroom, to four doubles and 2 bathrooms. The quality of work is excellent and Charlie project manages his team to ensure that they all deliver to a high standard- if it is not done correctlt they do it again, with Charlie spotting any issues. Timeline of build This has generally gone to plan very well. As with any build you have to be realistic as things will happen outside of anyone’s control. When issues have arisen Charlie manages them to a conclusion. Also be realistic if you are having to manage to a tight budget. I had to plan for various stage receipts of cash before I could order the kitchen and bathroom items - make sure you understand how this impacts the build and availability of the work force, recognising that CM Builders have to book kitchen fitters and plumbers. CM Builders are also very helpful in that they have sorted out issues with the brick work of my freestanding garage (nothing to do with the build) and also a neighbour’s wall that could have been dangerous to the public, should it have failed. Conclusion The whole family are very pleased with the outcome and we now have the equivalent of a brand new house that has been built to a very high standard. This has definitely been worth doing both from a valuation perspective and quality of life perspective. I would not hesitate to instruct Charlie and his team again.
Woodn Construction
Rating: 5 out of 5
Extension Builder in Clapham
Hi, I’m a carpenter and sole trader based in South West London with over nine years of experience in the trade. Over the years I’ve worked on a wide range of residential projects such as managing full site builds throughout to creating custom, made-to-measure furniture. My skills cover everything from stud walls, plaster boarding, skirting, architraves, doors and windows, to kitchens, flooring, and bespoke cabinetry. I take pride in delivering a high standard of finish and keeping things tidy and well-organised on every job. I enjoy working closely with clients to bring their ideas to life. Whether that’s fitting a new kitchen, renovating a room, or designing something completely unique. Based locally, I offer a reliable, friendly, and flexible service across SW London and the surrounding areas.
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Latest review:
Hard Flooring- 2 Mar 2026
Highly recommend Kaylum, he ripped out the old sub-floor and fitted a new sub-floor along with new Engineered wood flooring in all of the bedrooms and hallway. Quality of work and attention to detail was exceptional. His colleague then decorated all the rooms beautifully once the floor was installed - really happy with the end result.
Samz Construction Services ltd
Rating: 5 out of 5
Extension Builder in Clapham
We are a small construction firm aiming to provide high quality work. We do new built 'conversion, loft and extension, Refurbishment and all kind of building works. We can manage the building job from start to finish and help the clients with planning, party wall and structural drawings.
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Latest review:
Extensions- 4 Dec 2023
Happy with the quality of work and team was very friendly, everyday leaving the house livable for me and my wife while work was ongoing. Sohail offered good advice throughout the project and ended with shell completed after 8 weeks. Definitely reccomend getting a digger for excavation as we started building walls after 6 days, very fast! There were some minor delays as there are multiple projects going on in parallel, fitting in with timelines which is understandable as the team is very experienced and in high demand. Snag fixes were done promptly and all work signed off with building control. I would happily work with Sohail & team again, they have left the job with another satisfied customer - I think they turned out to be the best people to do the job, highly reccomend!
edildue
Rating: 5 out of 5
Extension Builder in Clapham
Groundworks, Fromwork, steel fixing, casting , general builders, carpentery , tiles , concrete , wood floor
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Latest review:
Handyman- 6 Nov 2023
Michele and his team did an excellent job of improving the external area of our property. Very professional communication, job was done to a high standard at a fair price. Done in a very timely manner and would highly recommend.
F&G Design and Build ltd
Rating: 5 out of 5
Extension Builder in Clapham
With a solid foundation of 15 years in the construction industry, our company has established itself as a beacon of excellence and reliability in transforming spaces Specializing in loft conversions, extensions, general building work, and renovations, we take pride in our ability to merge innovative design with impeccable craftsmanship.
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Latest review:
Bathroom Fitting- 14 Jun 2026
From start to finish, Darren and Aldi were completely professional and we are really happy with the finished result. They made design suggestions to help us make choices based on their vast experience and worked positively with us. The work was completed skilfully and with care. We would definitely recommend them without hesitation.
Mile Kresojevic
Rating: 5 out of 5
Extension Builder in Clapham
Hi, I am experienced self-employed carpenter with 10 years in various projects, working directly for clients while entrusted for their property. Good English, punctual, trustworthy and a reliable time keeper. Can provide references on request.
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Latest review:
Carpentry- 5 Dec 2017
Mile was prompt in supplying a quote and fitted us in within days. He was tidy in his work, pleasant to deal with and reasonable with his quote, we will use him again should we need any carpentry work.
Plastering and K rendering
Rating: 5 out of 5
Extension Builder in Clapham
🏗️ General Builder • Roofing • Extensions • Refurbishment – London Looking for a reliable and professional builder in London? We provide high–quality construction and renovation services at competitive prices. ✅ Plastering & Insolation Silicone Rendering ✅ Our Services Include: • General Building & Refurbishment – Full house renovations, kitchen & bathroom fitting, plastering, flooring, painting & decorating. • Extensions – Single & double-storey extensions, side returns, rear extensions, loft conversions, and garage conversions. • Roofing Services – New roof installations, flat & pitched roofs, roof repairs, waterproofing, guttering & fascias. • Structural Work – Brickwork, concrete, foundations, and load-bearing alterations. 💪 Why Choose Us? • Experienced team with over 16 years in the trade • All work guaranteed & fully insured • Competitive, transparent pricing • Clean & reliable service – we treat your home with respect • Free, no-obligation quotes 📍 We cover all London postcodes – Central London,North, South, East & West.
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Latest review:
Plastering- 16 Mar 2020
Almed and his team came over to see the two bungalows and gave me a quote and was more reasonable than other quotes I had previously. Almed started the job and stated exactly what he was going to do from the beginning to the end of the job. He is a very professional and knowledgeable person and he and his team did a outstanding plastering job on my two bungalows and I’m very happy with the job and will highly recommend him for future projects. Thanks Zai

4.2

Top rated Extension Builders

Our Extension Builders in Clapham, are rated 4.2 out of 5 based on 21 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Clapham?

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

Find extension builders in Clapham with MyBuilder

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

Step 2: Compare different extension builders in Clapham

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

Step 3: Hire Clapham extension builders with confidence

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

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

What to ask a Clapham extension builder before hiring?

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

An extension builder in Clapham 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 Clapham 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 Clapham?

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 Clapham 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 Clapham 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 Clapham

Can an extension builder in Clapham help with planning permission?

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

Many Clapham 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 Clapham help with materials and finishes?

Yes, most extension builders in Clapham 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.