Extension Builders in Clapham

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (17 reviews)

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Some of our top rated extension builders in Clapham

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MB Healthy Design Ltd
Rating: 5 out of 5
Extension Builder in Clapham
* 3D Design * Bespoke Furniture * Kitchen/Bathroom Cabinets * Fencing * Shopfitting We provide high quality services with affordable prices.
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Latest review:
The price was very reasonable for the quality of work he delivered. He used high quality materials and tools, and did not cut any corners. I am satisfied with the final product.
LMG Building Services Ltd
Rating: 5 out of 5
Extension Builder in Clapham
We are a family run business offering you a personal touch. Work is always completed to a high standard. We are members of the Federation of Master Builders & Our previous customers will be happy to confirm the level of Service, Quality & attention to detail that we provide as standard.
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Latest review:
Conversions - General- 3 Dec 2021
Would 100% recommend Lee. His professionalism and attention to detail was fantastic. Always available for questions outside of working hours (rare for a builder) and an overall nice guy. I'm definitely keeping his number for any future work I do.
Pops Building Services Ltd
Rating: 5 out of 5
Extension Builder in Clapham
I am a city and guilds advanced craft qualified carpenter/joiner With over 30 years experience in the construction industry. I was the director of a property development company. I’ve managed contracts for NHS trusts as well as private contractors. The types of work I normally undertake are loft conversions, extensions, renovations, kitchen and bathroom installations
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Latest review:
Peter was the on-site foreman on our complete house renovation, which took just over a year. This included an additional ensuite pod bedroom in the roof and a side-return and extension to the kitchen. Peter was totally reliable throughout the project and thoroughly professional. Throughout this time we were living in the house with the children. He was always on time, managed the on-site team well and communicated clearly with us. His workmanship is high quality and he was also a stickler for checking the work of others and getting it updated if it wasn’t up to scratch. I have no hesitation in recommending Peter.
Builds the thrills LTD
No reviews yet
Extension Builder in Clapham
Hi
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JavensDesign Ltd
Rating: 5 out of 5
Extension Builder in Clapham
Dear Potential Customers - Please get in contact if you want a 1st rate service from concept to completion! JavensDesign Ltd is a small Architectural Design company with over 15 years experience in the industry. We seek to build relationships with our clients in order to fully understand their requirements and achieve the best design possible! We pride our selves when it comes to our detailing skills which we feel is what makes a good project become great!
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Latest review:
CAD / Drawings- 20 Aug 2019
I hired Mr Simon Javens of JavensDesign and found him to be very professional and able to turn around a difficult planning application accurately and quickly complete with fully CAD design specifications. He is willing to go the extra mile to liaise with third party agencies, be it the Council or previous structural surveyor(s) and architect(s). A very pleasant chap indeed. You will not regret hiring his services. I received excellent advice in every step of the journey - Simon is very knowledgeable and willing to help. I would recommend him 100% and will definitely use him again. Thank you Simon!
PK Decorating & Building Services LTD
Rating: 5 out of 5
Extension Builder in Clapham
At PK Decorating and Building Services we are committed to deliver the highest standards of quality in everything we do.Make the most of your property with high quality work, done the way it should be; fantastic workmanship, client communication and ensuring everything is clean and tidy when the work has been completed.While PK Decorating and Building Services is based in South London, we can deliver our services across London and the surrounding areas.If you have any questions please contact us
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Latest review:
Bathroom Fitting- 26 Feb 2021
We needed a totally new bathroom and Pk did an Absolutely amazing job. From start to finish all in 2 weeks and for a really good price. Great advice on what we thought was good but their advice was better and more practical. Great to have builders with more than experience but an eye for detail aswell. Will definitely recommend them to others and will also use them again. Many thanks guys
Adamus and Contractors Limited
No reviews yet
Extension Builder in Clapham
Adamus & Contractors Limited We’re a friendly, hands-on building company with 10+ years’ experience, specialising in refurbishments, loft conversions and extensions. Whether you’re opening up a space, extending your home, or bringing an older property back to life, we handle everything from start to finish. We’ve got an in-house architect and interior designer, so we can take care of the planning, design and build all under one roof — making the whole process a lot easier for you. From steels and structural work right through to the final finishes, we use a solid team of trusted trades and take pride in doing things properly. We’re used to working in people’s homes, so we keep things tidy, organised and running smoothly. We keep it simple: clear quotes, honest advice, and no surprises. If anything changes along the way, we’ll talk it through with you first. You bring the vision. We bring the standards. At the end of the day, we just focus on doing a proper job and leaving you with a space you’re genuinely happy with.
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M & M ROOFING AND LOFTS LIMITED
Rating: 5 out of 5
Extension Builder in Clapham
We design for life, as well as style. That's why clients have trusted Mew developments for the past decade. We cover all aspects of the building trade quality is at the heart off everything we do. All of our tradesmen are passionate about creating solutions that are comfortable and useful. They are all individually trained to meet our exacting standards and, more importantly, yours.
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Latest review:
Extensions- 22 Oct 2018
Choosing MM builders was the best decision we could have made. Initial meetings: They took time to ensure they understand our work. They never complicated matters nor tried to hide things in any fine print and provided us with a estimated schedule and explained we would be kept up to date at all stages. Works: Their knowledge and work ethic is amazing and is reflected in their work. They gave us confidence and built trust very quickly. Always willing to go the extra mile and used their expertise to help us rectify issues or make suggestions in areas we would have never noticed ot thought of. Sam, Ross, Bill & Harry were so pleasant to have around the house. They were very conscious of the 3 young children in the house of which one has additional needs. They minimised disruption which is very difficult when doing major work in a areas and were always friendly and polite. We had no issues in having them inside our property which is very important when completing works taking just over 5 months. They work with specialist tradesman (tiler, plasterer, etc.) who are equally good at their trades. MM were very professional when it came to liasing with Building Control and made sure they were involved and visited at all key points. The aftercare we received was as good as we had received throughout the process. I have no hesitation in recommending MM for any building works. If I was to ever undertake any works in the future, it would be by them and only them.
Vasile Balta
Rating: 5 out of 5
Extension Builder in Clapham
Thank you for reading this I’m Vas( owner of BALTA COMPLETE CONSTRUCTION LTD)from 16 started as a apprentice in construction industry, have work over the years on big projects also small ones , when I was about 30 years old whit lots of experience in house refurbishment, extensions and lofts , decided to open my business, it was the best idea I take Ower focus as a business is a hight quality service, on all projects(big or small) and the feedback from the profile prof this As a person in charge whit the projects, I’m very easy to talk to, friendly , also more than happy to sort issues out Thank you for reading this As a business ower focus is on quality, high end finishes and trat each coustumer whit respect, and live them happy after the project is finished
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Latest review:
Conversions - General- 24 Apr 2026
I recently had extensive work completed in my flat by Vas, and I couldn’t be happier with the result. The service was excellent from start to finish. Not only was the quality of the work consistently high, but the whole experience was smooth and stress-free. What really stood out was Vas’s level of skill and versatility. Every aspect of the project was handled with care and professionalism — from plumbing and new water heating pipes, to new electrics, installing a new kitchen, laying a beautiful wooden floor, renovating the bathroom, and even replacing doors with a sliding door system. Each element was completed to a very high standard. On top of that, Vas was friendly, proactive, and easy to communicate with throughout. Nothing ever felt like too much trouble, and it was clear he takes real pride in delivering great results. It was genuinely a pleasure to deal with Vas, and I would highly recommend his services to anyone looking for reliable, high-quality work. Thank you again!
GBN Building Services Ltd
Rating: 5 out of 5
Extension Builder in Clapham
We are a small but very experinace and reliable team.The work we undertake includes Lofts,Kitchen extension,Internal refurbishment,Bathrooms,Painting and decorating jobs, General building.
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Latest review:
Carpentry- 21 Mar 2023
Georgi did a good job. He is easy to deal with and can be relied on.
JED BUILDERS LTD
Rating: 5 out of 5
Extension Builder in Clapham
A limited company established in 2016. More that 8 years experience in construction business. We undertake all building works, big or small, managing and looking after project so the client can have the best results possible.
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Latest review:
Kitchen Fitting- 14 Dec 2018
Very lovely and professional and clean. Very prompt/punctual and worked efficiently , will be using them again to do more work in my property. Definitely with recommend them to anyone ! 10/10 from me ! Good service delivery
SZG BUILDING LTD
Rating: 5 out of 5
Extension Builder in Clapham
18years of experience in the construction sector. I may only offer you quality services and nothing less, with SZG BUILDING LTD you will not have to worry about anything. I specialise in every stage of the construction process, right from the very beginning till the very end, in other words from FOUNDATION to DECORATION in the blink of an eye. I will be very pleased to show my previous work, it may be the final outcome or different stages of various projects. References may be provided.
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Latest review:
Kitchen Fitting- 20 Jun 2019
Really pleased with Slawek and his team and would defiantly recommend them after seeing a professional kitchen fit job which they did for me. They went extra mile to resolve some design issues during the fit, kept the work area clean and tidy and behaved in friendly, polite manner. Nice, reliable team charging very reasonable prices.
EXCLUSIVE BUILDS LTD
Rating: 5 out of 5
Extension Builder in Clapham
Exclusive Builds Transforming Spaces with Excellence for your new build. Creating your ideal new build space with top-notch construction. With over 13 years of experience in the construction industry, Exclusive Builds Ltd has become a trusted name in the field of construction. Our team of experts has the knowledge, skills, and expertise to handle any project, big or small. We have completed numerous projects ranging from residential homes to commercial buildings, and our clients can attest to our commitment to quality and excellence.
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Latest review:
Raf and Paul were great. We did a massive 6m pitched roof extension - it was a big undertaking but they were both very professional and did a great job. We are absolutely delighted with our new space and can't thank you guys enough!
PROHAUS LTD
Rating: 5 out of 5
Extension Builder in Clapham
We have a number of years experience of working in the industry, we have done a range of different projects over the years including domestic work along with commercial work and shop fitting. We can take on projects of all sizes, from small renovation works to project managing your new extension.
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Latest review:
Extensions- 18 Oct 2017
I asked Prohaus to undertake a ground floor side return and rear extension as part of the refurbishment of my flat in Putney. I have used many builders before on development projects but was especially impressed with Naz and his team on this build. It was the first time I used them and won’t be the last. Naz was great to work with, the whole build went smoothly and he always had a positive attitude and solution to any unexpected issue. The build came in on time and budget which was very impressive in itself. All in all I would highly recommend him.
Bricklayer
No reviews yet
Extension Builder in Clapham
I’m an experienced and reliable bricklayer providing high-quality workmanship across all aspects of brick and masonry work. I take pride in delivering clean, professional results and ensuring every customer is completely satisfied with the finished job. My services include bricklaying for house extensions, garden walls, repairs, and structural alterations, as well as specialist repointing to restore and protect older brickwork. I also carry out damp-related repairs such as replacing damaged bricks, improving pointing, and fixing areas where water penetration has caused issues. Whether it’s building a brand new extension, repairing damaged brickwork, or restoring existing walls, I focus on attention to detail, durability, and a tidy job from start to finish. I’m happy to offer advice, honest quotes, and solutions that suit both your property and your budget. Customer satisfaction is my priority, and I aim to complete every job to a high standard that will last for years to come.
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ArtInFacade
Rating: 5 out of 5
Extension Builder in Clapham
I’ve been working in the construction industry for 15 years, building a strong foundation of hands-on experience in both residential and commercial projects. Throughout my career, I’ve taken on roles ranging from general laborer to skilled trades, including roles like Roofing, Kitchen & Bathrooms fitting, framing, drywall, concrete work, etc. I’ve worked with a variety of crews and contractors, always contributing solid work and a strong work ethic. I’m currently based in London, but I’m available for jobs in surrounding areas and willing to travel for the right projects. I’ve worked in and out of London and have no problem taking on Projects of London when needed. My skill set includes: Reading and interpreting blueprints and site plans Extensions Loft conversion Kitchen & Bathrooms Framing, drywall installation, and finish work Concrete pouring and formwork Operating power tools and heavy equipment safely Site prep, demolition, and cleanup Strong knowledge of safety procedures What sets me apart is my reliability, attention to detail, and ability to stay productive without needing constant supervision. I take pride in my craftsmanship and believe in doing the job right the first time. I’m punctual, easy to work with.
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Latest review:
This contractor is very professional, friendly, and has a smooth finish. They’re probably one of the best in town, and they’re also affordable.

4.1

Top rated Extension Builders

Our Extension Builders in Clapham, are rated 4.1 out of 5 based on 17 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 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.