Extension builders in Clapham

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

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

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in Clapham

3618 Results

Sort by:

Bjorn brickwork and groundwork’s LTD
No reviews yet
Extension Builder in Clapham
We are a family run construction business based in Dormansland, Surrey specialising in brickwork extensions and new builds . We have been operating in surrounding areas for a number of years and have 40 plus years of experience in the trade We provide services to customers and to builders in the local area where we have built our reputation for our services . We are a reliable, hardworking and friendly team.
Get in touch
London Homes Construction Ltd
No reviews yet
Extension Builder in Clapham
All building works undertaken: single extension, double extension, loft conversion, refurbishments from private works to commercial projects. Family business who you can trust with several years of experience. We live by our motto: treat other people as you would like to be treated yourself.
Get in touch
R&J Quality & Decorating Ltd
Rating: 5 out of 5
Extension Builder in Clapham
R&J Quality & Decorating Ltd is a Basildon‑based home improvement and decorating business established in 2019, offering a wide range of services including house refurbishment, decoration, plumbing, electrical work, bathroom tiling and general renovations. The company focuses on quality workmanship and customer satisfaction, aiming to transform living spaces with meticulous attention to detail and a comprehensive approach to home improvement. �
Get in touch
Latest review:
Hard Flooring- 2 Oct 2026
Really happy with the flooring work from Remus. He fitted engineered wood flooring in my home office, including removing and disposing of the old carpet, fitting new boards, laying plywood underneath, removing and refitting new skirting boards and painting the room. It wasn’t a straightforward job as the existing floor was uneven and there were gaps around the old skirting but Remus dealt with these and left everything looking neat and well finished. The end result looks excellent and has made a big improvement to the room. Remus was easy to deal with, timely,helpful, and clearly cared about getting the finish right. I’d definitely recommend him to anyone looking for a decorator.
As2 construction Ltd
No reviews yet
Extension Builder in Clapham
AS2 Construction Ltd , where craftsmanship meets innovation. As a leading construction company, we specialize in delivering high-quality projects tailored to meet your vision. Our dedicated team of experts ensures excellence in every detail, making us your trusted partner in construction solutions. Explore a seamless blend of expertise, reliability, and creativity with AS2.
Get in touch
Dunham and vardy construction limited
No reviews yet
Extension Builder in Clapham
We are a family run building company, we offer small extension to renovations to new builds and patios and all aspects of building requirements
Get in touch
Quality Build Ltd
No reviews yet
Extension Builder in Clapham
I am a professional builder with 20 years experience, I specialise in loft conversions and extensions. I have a full team providing customers with a high quality finish every time. I have plenty of references and photos of previous projects if required.
Get in touch
A&s builders and contractors
No reviews yet
Extension Builder in Clapham
We are team of qualified and professional tradesmen covering all aspect of building work, full house wiring, plumbing, bathroom renovations, painting and decorating, extentions and even double glazing. Our team is very professional and customer satisfaction is our first priority.
Get in touch
DW Brickwork
Rating: 5 out of 5
Extension Builder in Clapham
Hi, I’ve been a Bricklayer for 20 years. All brick and blockwork undertaken from garden walls extensions new builds etc. All work is high quality and neat. I also have building insurance covering up to 1 million pounds of damage. Company Name: Simply business. Policy number: ASB14059198XB2
Get in touch
Latest review:
Bricklaying- 20 Oct 2026
Dean is an absolute star. We had a builder cancel at the very last minute on us which meant that other works would get delayed. Dean was able to come in and do the work very promptly and to a very high standard. Moreover when Dean had finished the job he asked if there was anything else he wanted me to do while he was here - I really appreciated this. I would definitely recommend Dean, and will be contacting him again if I have any work that needed to be done. 5 stars all around !!
Top Of
New on MyBuilder
Extension Builder in Clapham
We are a trusted team of experienced builders specialising in home renovations, extensions, and structural alterations. From kitchen and bathroom refits to full property restorations and load-bearing wall removals, we deliver high-quality work on time and to budget. Fully insured, reliable, and committed to clear communication from start to finish.
Get in touch
DIAplumbing
New on MyBuilder
Extension Builder in Clapham
Professional plumber/heating engineer with over 20 years of experience.
Get in touch
Samuel Motac
No reviews yet
Extension Builder in Clapham
Reliable Building & Home Improvements I provide reliable, professional building and home improvement services for homeowners across London and the surrounding areas. With professional experience working in residential construction and project management, including my role working with Motacus Constructions, I bring a high standard of workmanship, organisation and attention to detail to every project. I undertake a range of residential projects, including brickwork, blockwork, repointing, garden walls, landscaping, patios, concrete bases, drainage, property repairs, kitchen and bathroom installations, and general interior improvements. Whether you need a small repair, a home improvement project or help bringing your ideas to life, I offer a straightforward, reliable service with attention to detail and clear pricing.
Get in touch
Robert
No reviews yet
Extension Builder in Clapham
Hello , currently working as a bricklayer from 7 years and I'm doing extension with small gang from about 2years Been doing garden walls , extensions, houses
Get in touch
Saints Lofts Ltd
New on MyBuilder
Extension Builder in Clapham
We are a dedicated team of professionals specialising in loft conversions. We create bespoke spaces unique to our customers to elevate and uplift their current home. At Saints Lofts the customers' requirements are always put first and foremost. We will be present and informative with the customer every step of the way as we are turning your dreams into reality. Whether it be a loft conversion or extension, we would be delighted to provide you with more information and advice, with no obligation. Reach out to us!
Get in touch
R rose builders ltd
No reviews yet
Extension Builder in Clapham
We are a family run business with a great work ethic and always happy to help or advise. We have been in the building industry over 15 years with another venture in waste removal. We cover the whole of the uk with our services with anything from renovations to new builds, house clearances to demolitions and much more We are always competitively priced and always leave a tidy finish. Please get in touch for a no obligation free quote. Look forward to hearing from you
Get in touch
chris
No reviews yet
Extension Builder in Clapham
Electrical installation, Landlord certificate, EICR, Condition report , Fault finding etc
Get in touch
DJB Structural Carpentry
No reviews yet
Extension Builder in Clapham
DJB Carpentry is a specialist carpentry contractor operating throughout Essex and the surrounding counties. We have over 25 years of experience specializing in structural carpentry requirements. This includes everything from traditional cut and pitched roofs through to complex trussed roof structures and timber framed buildings and Glulam structures, We also carry out works on various other build types.
Get in touch

4.6

Top rated Extension Builders

Our Extension Builders in Clapham, are rated 4.6 out of 5 based on 19 reviews from customers like you.

Quality screening

Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

What types of services are offered by local extension builders in 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.