Extension builders in London

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

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Some of our top rated extension builders in London

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DMG builders
No reviews yet
Extension Builder in London
Hi This is Mohammad I have done this job over 10 years I happy to help clients doing there jobs and get them the highest quality of finishing
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Kamcio
Rating: 5 out of 5
Extension Builder in London
Hello, I’m Kamil Ladniak, a dedicated and experienced Polish tradesman, specializing in domestic refurbishment projects. With over 20 years in the industry, I bring a wealth of knowledge and skill to every project I undertake, ensuring the highest standards of craftsmanship and customer satisfaction. I offer a wide range of services tailored to meet your needs, including: • Complete Bathroom Renovations: From initial design to final installation, I can transform your bathroom into a luxurious, functional space. I handle everything from plumbing to tiling, ensuring a seamless process. • Complete Kitchen Renovations: I offer full kitchen refurbishments, including installation of cabinets, countertops, appliances, plumbing, and tiling. Whether you’re updating an old space or designing a new one, I’m here to bring your vision to life. • Carpentry: I specialize in bespoke woodwork, from custom-made wardrobes and cupboards to shelving, doors, and more. If you’re looking for unique, high-quality carpentry, I’m the right person for the job. • Plumbing: With experience in both small repairs and large installations, I can take care of all your plumbing needs—from fixing leaks to installing new plumbing systems for bathrooms or kitchens. • Tiling: Whether it’s a kitchen backsplash, bathroom floor, or feature wall, I provide expert tiling services, ensuring a neat and professional finish every time. • Full Home Decorating: I offer comprehensive decorating services, including painting, wallpapering, and plastering, to give your home a fresh, updated look. • General Domestic Works: I also handle a variety of general domestic projects, both internal and external, including patios, conservatory installations, and fencing. If you need help with any other home improvements, I’m happy to assist. What sets me apart is my commitment to quality. I’m punctual, hardworking, and always strive to exceed my clients’ expectations. I pride myself on delivering results that not only meet but often surpass the standards of my clients. In addition to my skills, I also have trade accounts with well-known suppliers such as Howdens and Topstiles, which allows me to offer you significant discounts on kitchen materials, tiles, and more. Free Inspection & Quotation I offer free, no-obligation inspections and quotations, which you are welcome to compare with other tradespeople. I believe in transparent pricing and providing you with all the information you need to make an informed decision. If you’re ready to start your project or need more information, please don’t hesitate to contact me. I’m here to help and look forward to working with you. Thank you, Kamil Ładnik
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Latest review:
Carpentry- 23 May 2025
Kamil created a third bedroom for us in unused space in our flat. This involved carpentry, electrics and plastering within the job. We are extremely happy with the finished result. He was friendly, reliable and above all else the finish was excellent. He completed the work efficiently and we would totally use him again as and when needed.
Kastrati Bricklaying
Rating: 5 out of 5
Extension Builder in London
Kastrati brickwork offer the best quotes in brickwork,blockwork,patio slabs,blocks paving and etc
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Latest review:
Bricklaying- 20 Jul 2026
AN EXCELLENT BUSINESS, PROMPT AND EFFICIENT THANK YOU SO MUCH
Remdraly Design Ltd
Rating: 5 out of 5
Extension Builder in London
Remdraly Design Ltd — 25+ years of carpentry & joinery expertise, trading since 2015. We deliver kitchens, lofts, flooring, extensions and full refurbishments across East London, for domestic and commercial clients. Reliable, professional craftsmanship — done right, every time.
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Latest review:
Decking- 21 Aug 2020
High quality workmanship - friendly and professional. Would highly recommend.
Andrzej Truchanowski
No reviews yet
Extension Builder in London
I’ve been in the industry for 20 years. I specialise in construction, steel work, extensions, basement conversions, landscaping, fixing fences etc. I view myself a professional builder and a handyman happy to help others.
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Avista Construction Ltd
No reviews yet
Extension Builder in London
Extensions and loft conversions, carpentry and joinery, bathrooms and kitchens fitting, decorating and all relating works
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Kp building
No reviews yet
Extension Builder in London
Here at kp building we want the best for our clients.we are a building company that has all your building needs under one roof.we specialise in loft conversions and extensions to a very high standard. We also do all types of building work no job to small. References available on request and can show jobs that I have completed.
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Goldenfield
No reviews yet
Extension Builder in London
Loft convention, kitchen Extention, house conversion to flats.
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Dan’s Team Projects Ltd
No reviews yet
Extension Builder in London
25 y of experience in building sector. Working as a multi trade person for companies now set up own . Always good communication and problem solving.
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MUZAAL construction limited
No reviews yet
Extension Builder in London
A professional and friendly construction team and our aim is to keep our clients happy and satisfied.
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Nick building connections ltd
No reviews yet
Extension Builder in London
Almost 5 years doing lofts extensions refurbishment
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Simon Beck
Rating: 5 out of 5
Extension Builder in London
I’m Simon Beck, And started up my business 12yrs ago, We cover South London and Kent. I pride myself on the workmanship and skill We provide, along with giving a 5⭐️ service at a very reasonable cost. All works come with before/after images On completion and invoice sent. We specialise in Guttering and Roofing repairs also carry out general gutter Cleans And Maintenance. Please take alook at my profile and picture gallery for a small sample of just some of our work and 5⭐️ Reviews. 😊👍🏻✅
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Latest review:
Guttering- 27 Mar 2024
Great job from Simon - communicated well, arrived on time and did a great job. Thanks Simon!
B&D Build Ltd
No reviews yet
Extension Builder in London
We are B&D Build with over 12 years of experience in construction and we undertake projects such as, extensions loft conversion, refurbishment etc. We operate from small to big projects so whether you are looking to expand, renovate or even just remodel you can trust the B&D build to achieve your vision. Strong client communication is our priority leading to skills and quality in every job we undertake.
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Samy
No reviews yet
Extension Builder in London
I’m on the busines more than 10 years please letmy help we’d your garden Driwey fence and autbuilding For more information please call mail or text
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Calibra damp proofing LTD
No reviews yet
Extension Builder in London
Welcome to Calibra we are a family run company specialising in architectural services , damp proofing , general building & a bespoke design and build services all these services under one roof to bring you a seamless service you will be sure to recommend
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nishan builders ltd
No reviews yet
Extension Builder in London
More than just builders, we're partners in creating your dream home. As a family-run construction company in the UK, we specialise in extensions, refurbishments, and new builds, offering design and construction services tailored to your specific needs. We pride ourselves on clear communication, attention to detail, and a personal approach that makes the building process enjoyable.
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4.6

Top rated Extension Builders

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

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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 London?

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

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

What are the hourly rates of extension builders in London?

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

Find extension builders in London with MyBuilder

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

Step 2: Compare different extension builders in London

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

Step 3: Hire London extension builders with confidence

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

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

What to ask a London extension builder before hiring?

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

An extension builder in London 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 London 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 London?

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 London 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 London 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 London

Can an extension builder in London help with planning permission?

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

Many London 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 London help with materials and finishes?

Yes, most extension builders in London 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.