Extension Builders in Clapham Junction

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (20 reviews)

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Some of our top rated extension builders in Clapham Junction

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Window diy ltd
Rating: 5 out of 5
Extension Builder in Clapham Junction
More than 15 years experience in the building trade. Carry out all building work from extensions to loft Conversions and renovations. Can assist in planning applications and structural drawings. Fensa Registered Company - More than 15years experience in the glazing field and construction field. Supply and installation of high quality UK made glazing products. 10 year warranty on all installations. Cover all of West London , Surrey, Bucks, North London.
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Latest review:
Windows & Doors (uPVC & Metal)- 13 Jul 2026
Works were carried out within schedule. Honest and reliable. Communication was good all the way through. Property was left clean and tidy. Would definitely recommend.
Istvan Beck
No reviews yet
Extension Builder in Clapham Junction
With 20+ years experience within the USA and Europe, Im able to provide professional, precise and excellent work. Bespoke furnitures, carpentry, total home refurbishment, decorating, interior and exterior jobs and all kind of building works.
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Johan
Rating: 5 out of 5
Extension Builder in Clapham Junction
Hello to all visitors to my profile. My name is Przemek, I deal with interior renovation, bathroom finishing and kitchen installation. I owe this to my acquired experience. I have been working in UK for 7 years, of which for 1.5 years I was a bathroom and kitchen fitter at the "WICKES" store. I am a precise and aesthetic person. I love order at the workplace and I like seeing a smile on a customer's face.
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Latest review:
Tiling- 18 Apr 2026
Przemek did an absolutely brilliant job tiling the bathroom. A top standard finish and it looks fantastic! He is polite, professional, tidy, punctual, and he has a keen eye for detail. I wouldn't hesitate to use him again, highly recommended.
KBL Construction Service Ltd
Rating: 4.7 out of 5
Extension Builder in Clapham Junction
we have 10+ years of experience and provide high quality of workmanship in every aspect of building services from refurbishments to loft conversion and extension.we are professional team of skilled builders, tillers, bricklayer, carpenter, painter and provide services for plumbing and electric work.
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Latest review:
Extensions- 13 Oct 2023
KBL recently completed a side infill extension for us that involved a lot of complex hurdles (e.g., requiring special foundations because of a Thames Water waste pipe and steel beams). In hindsight, we were very lucky to have hired them because they made the whole experience stress-free by explaining everything to us and handling our neighbours, contractors, structural engineer and building control for us. The amount of digging in confined spaces and hard, physical labour they put into this job is amazing. The extension looks great, is solid, warm and watertight. The wetroom they built inside it hasn't had any problems - plumbing is working great. Their plastering quality is excellent. We had to live in the property during the 4 months of construction but we felt relaxed and 100% trusted KBL to respect and care for the house. They have a lot of experience, know the building regulations, use quality materials and methods, they answered all of our questions with patience and always responded to my phone calls + texts quickly. They're so good that we'll give them an additional job to do which we originally planned for in spring 2024. Everyone we know wants KBL's contact details and we definitely want to ask them back for future work.
Dobruna Construction Limited
Rating: 5 out of 5
Extension Builder in Clapham Junction
Dobruna Construction Limited is happy to assist with any kind of building project, big or small. It’s our aim to make your vision reality and help you to improve your home for you and your family. Our work ethic is friendly, efficient and professional.
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Latest review:
Undertook extensive building work - a rear and side extension, built a summer house, landscaped the garden and paved a new driveway. They are the best building company I have ever worked with. Courteous, tidy, excellent quality, considerate of our family and our neighbours. Afrim consistently gone went and beyond to ensure that my renovations were completed to a high standard and at a fast pace. I am so pleased I made the decision to let him manage the building work from start to finish as his electrician, plumber, tilers, kitchen fitters have all been fantastic. Building works can be extremely stressful but Afrim did everything to make sure it has been as smooth as possible - would highly recommend
BSM Interior Ltd
Rating: 4.8 out of 5
Extension Builder in Clapham Junction
Your search for qualified and skilled builders ends here. Made Construction Simple is a team of licensed and insured specialists builders in London with over one decades of combined experience. From extensive loft conversion, extension,refurbishments to bathroom and kitchen renovations, we offer a wide range of services. You can rest assured that we have the expertise to efficiently handle your construction project. Good and dependable work isn’t possible without the necessary qualifications. Every professional on our team is qualified and highly experienced. We undertake all aspects of planning, building and construction services according to the highest standards of workmanship. We prioritise quality, safety and consistency at every step of the way. Our services are compliant with local authority laws and government regulations. We pride ourselves on our exceptional attention to detail. In addition to superior functionality and durability, we don’t forget about how the final result looks. We strive to deliver the best of structural integrity and aesthetics.   Our professional builders go above and beyond to earn your trust. We are dedicated to starting and completing jobs on time for 100% customer satisfaction. If there are any unforeseen delays, you will be promptly informed and kept in the loop. We also ensure that every project is within the specified budget.
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Latest review:
Kitchen Fitting- 9 Jul 2026
I hired Blend for a light house renovation. It started off really well then towards the end he ghosted me. No reason given. He didn’t answer phone calls or texts. There was no fight or disagreement. There is no decent reason why he shouldn’t communicate with a client. You can simply just say you have another job or you are not interested any longer. You don’t ask a client to buy stuff knowing you are not going to show up. It is an unacceptable and unprofessional behaviour. Because of this it’s cost me time that I can’t get back. But I guess it is what it is. I had to find another builder to complete the job. Some of which was not done properly. For example: my kitchen sink was leaking both inside and out. Had to buy a new toilet as something was broken while he was refitting it and etc. Pros: Blend is a nice and easy person to deal with. He is generally a nice guy. Tiling ✅ Cons: Finishing is not so great. could be a lot better. I also found patches and over paint on doors and others.
Leo81
Rating: 5 out of 5
Extension Builder in Clapham Junction
I am good at what I do and I'll do my best to get your house to look the way you want it to!
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Latest review:
Restoration & Refurbishment- 19 Apr 2025
Positively, certain aspects of the finishing, particularly tiling, were carried out to a good standard. However, the overall experience was mixed due to significant issues. There were notable challenges during the project involving basic logistics and site management, leading to considerable inconvenience that seemed avoidable. Furthermore, the quality of workmanship was inconsistent; while some parts were good, other areas involving fittings and fixtures showed a lack of attention to detail in the finish, requiring later adjustments. Communication during the process could also be difficult, particularly regarding problem-solving and planning for materials. While we appreciated the parts done well, the project was let down by these inconsistencies and process issues, leading to some ongoing snagging and disappointment.
Graal Structural Engineering Ltd
Rating: 5 out of 5
Extension Builder in Clapham Junction
We offer Structural Desing and Calculations for New Build, Extensions, Loft Conversions, etc. Detailed drawings and calculations for Building Control. We offer one-stop-shop services including, planning applications, architectural & structural design, cost estimations, project management and construction works.
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Dan
Rating: 5 out of 5
Extension Builder in Clapham Junction
I do loft, extensions and refurbish houses (General building)
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Latest review:
Hi, Dan recently completed a loft conversion and ground floor extension for our house in Ealing. It is the second time I've used him for a loft conversion. We are delighted with the work, team, price and timing and I highly recommend him. Dan is entirely trustworthy, and the team are a mixture of his family, friends and choir group. Like all projects there were a few snags and without fail Dan was pragmatic, helpful and keen to make sure we were happy with the quality at the end. I've recommended him to neighbours on both sides who are both pleased and happy to recommend him.
Synergy Construction Group Ltd
Rating: 4 out of 5
Extension Builder in Clapham Junction
Synergy Construction Group carry out a vast amount of different works. With our in house team of tradesman we deliver any project to very high standards. We have over combined 40 years experience and can deal with any type of work. Our previous projects show what high standards we work to
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Rutba design & build ltd
Rating: 5 out of 5
Extension Builder in Clapham Junction
I provide complete building services like loft conversion, side & rear extensions, kitchen, bathroom, plumbing, underfloor heating, electric & driveways, painting & decorating etc.
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Latest review:
Absolutely great quality of work and outstanding service. Jagjeet and his team have done a great job without any delays. Honest and hard working. Very happy to recommend Rutba
Dana Business Group LTD
No reviews yet
Extension Builder in Clapham Junction
Dana Business Group Ltd – Property Renovation, Extensions & Loft Conversions Dana Business Group Ltd provides professional renovation, construction, and repair services for houses and apartments. We undertake projects of any size, from small repairs to full refurbishments, house extensions, and loft conversions. Our services include: * Full and partial property renovations * House extensions and structural works * Loft conversions * Kitchen and bathroom fitting * Plumbing services * Electrical works * Painting and decorating * Flooring installation * Plastering and drywall * General maintenance and repairs We guarantee high-quality workmanship, reliable service, and strong attention to detail. Free quotes available. Competitive prices. Flexible scheduling.
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Ridgewell Roofing and Building Ltd
Rating: 5 out of 5
Extension Builder in Clapham Junction
Ridgewell roofing and building ltd is a family owned and run business, we strive for perfection in the quality of our work , competitive pricing and customer satisfaction , no job is too big or too small , we do all types of roofing , from flat roofs in felt rubber fibreglass, pitched roofs repointing leadwork valleys and general maintenance feel free to get in touch
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Latest review:
Roofing (Pitched)- 8 Jul 2026
Really happy with the work James and the team did. From the start, James was easy to speak to, answered all my questions, and gave a fair quote. They changed our flat porch roof into a pitched roof and did a great job with the tiles, leadwork, fascia and guttering. The roof looks really good, everything was left tidy afterwards, and the whole process was straightforward. I’d happily recommend Ridgewell Roofing and Building Ltd.
B.C.R BUILDING CONTRACTORS LIMITED
No reviews yet
Extension Builder in Clapham Junction
Battersea Clapham Renovations are a home renovation company based in South West London. We specialise in high-quality residential refurbishments, extensions, and loft conversions. We offer end-to-end services—from design and planning to construction and finishing—tailored to each client’s needs. With a focus on craftsmanship, sustainability, and local expertise, we help homeowners transform their spaces efficiently, on time, and within budget.
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Interior&exteriorbuild
No reviews yet
Extension Builder in Clapham Junction
We complete all projects in accordance with relevant planning and building regulations. It doesn’t matter if we’re working on a small refurbishment, or a large project,
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Jnnybyte Ltd
Rating: 5 out of 5
Extension Builder in Clapham Junction
Hello, I’m Param — a professional builder with a solid background in both residential and commercial projects. I offer complete building solutions from start to finish, handling everything including: Tiling (floors, walls, kitchens, bathrooms) Full renovations & extensions Plastering & painting Bricklaying & structural work Electrical installations Plumbing & bathroom fit-outs Waterproofing & insulation Decking, fencing, and outdoor work Whether you’re renovating a single room or building an entire space, I ensure each task is completed with top-quality craftsmanship, attention to detail, and a strong focus on customer satisfaction. I use only trusted materials and proven techniques to deliver lasting results. I’m committed to professionalism, clear communication, punctuality, and getting the job done right the first time. Let’s work together to bring your vision to life—stress-free and to the highest standards.
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Latest review:
I hired Jnny Byte for a tile installation project, and I’m extremely satisfied with the results. The team was professional, punctual, and paid great attention to detail. They used high-quality materials, and the installation was flawless, transforming my kitchen and bathroom. The job was completed on time and exceeded my expectations. Highly recommend JnnyByte for anyone needing reliable and precise tiling work!

4.2

Top rated Extension Builders

Our Extension Builders in Clapham Junction, are rated 4.2 out of 5 based on 20 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Clapham Junction?

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

Find extension builders in Clapham Junction with MyBuilder

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

Step 2: Compare different extension builders in Clapham Junction

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

Step 3: Hire Clapham Junction extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Clapham Junction, 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 Junction extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Clapham Junction extension builder before hiring?

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

An extension builder in Clapham Junction 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 Junction 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 Junction?

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 Junction 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 Junction 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 Junction

Can an extension builder in Clapham Junction help with planning permission?

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

Many Clapham Junction 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 Junction help with materials and finishes?

Yes, most extension builders in Clapham Junction 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.