Extension Builders in London

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (18 reviews)

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

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Some of our top rated extension builders in London

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D p Smith brick and stonework
No reviews yet
Extension Builder in London
Brickwork masonary specialist With 20 years experience in brick block and natural stone
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RAILEM BUILDING CONSTRUCTION LTD
No reviews yet
Extension Builder in London
Railem Building Construction Ltd – experienced builders specialising in high-quality home extensions, renovations, and commercial projects across London and Essex. With years of hands-on expertise, we deliver everything from small single-storey extensions and porch builds to large double-storey extensions, loft conversions, kitchen extensions, garage conversions, and full refurbishments. In recent years we have successfully completed major commercial projects, including stadiums and large buildings, alongside hundreds of private residential jobs for families in Romford, Ilford, Barking, Dagenham, and surrounding areas. We use premium materials, strictly comply with Building Regulations, Part L (energy efficiency), Party Wall Act, and CIS requirements. Our team guarantees on-time delivery, attention to detail, and premium finishes. We offer full workmanship guarantees, top-level public liability insurance, and real client references. Contact us today for a free site visit and detailed quotation , let’s turn your vision into a solid, beautiful reality!
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UKPC CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in London
Based in London, UKPC Construction delivers high-quality building services with a personal touch. We specialise in full house refurbishments, renovations, loft conversions, and structural alterations. With a skilled and reliable team, we take pride in offering tailored solutions to suit different needs and budgets—without compromising on craftsmanship or attention to detail. At the core of our work are trust, reliability, and a strong commitment to client satisfaction.
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Latest review:
UKPC Construction is by far the best company I have ever worked with, and I highly recommend them to anyone. Their team is not only courteous and professional but also a breeze to work with. They expertly helped me transform my jungle-like garden, and although I'm writing this review after some time, I'm now looking forward to discussing the extension project they initially designed with me. A big thank you to UKPCC, and I wholeheartedly endorse their services to everyone.
Keiths electrical services
No reviews yet
Extension Builder in London
50 years guiding experience
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Carry on laying
No reviews yet
Extension Builder in London
My name is John,I’m 43 and live in Watford I have been bricklaying/landscaping for 23 years now. I have a good friendly team of professional tradesmen who are reliable and very hard working Over the years we have been involved various small and large projects,varying from garden works to new builds.we are also lucky enough to have been part of a number of film and media projects 🎥 We love what we do and always compete jobs to a high standard,we take great pride in every job we are lucky enough to be involved in
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Santo Sons LTD
No reviews yet
Extension Builder in London
Xyz will update this later on
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Richard Wilson
No reviews yet
Extension Builder in London
I’m an experienced and hands-on builder who takes pride in doing solid, reliable work. I’m confident working on all kinds of jobs—from small repairs to full builds—and I always aim to keep things running smoothly, on time, and to a high standard. I keep things tidy, and I’m not afraid to put in the hard graft to get the job done right.
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Evermount construction ltd
New on MyBuilder
Extension Builder in London
We are evermount construction ltd based in London. We specialise in house extension, renovation, new build, out building and loft conversion. We use premium quality material with experience team.
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Kbs construction team ltd
No reviews yet
Extension Builder in London
We are providing all building work to our customers as loft conversion,side and rear extension work ,full house refurbishment ,kitchen and bathroom renovation.
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We Do Foundations and Extensions Ltd
No reviews yet
Extension Builder in London
We are actively involved in the provision of top-quality residential and commercial construction services. We expertly coordinate every aspect of our client’s construction project, from design and planning to custom fabrication and on-site management.
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Luxury design masters Ltd
No reviews yet
Extension Builder in London
Hi we are in LDM (Luxury Design Masters LTD) the best team to build your home dream we are specialist in commercial & domestic renovation we can make your place look luxurious and we can work it on your budgets we do all building works from AtoZ we are £10m insured cover we done Westfield, Sweeden, Gloucester quays shopping centres and many luxury homes we can proven it. we try to help many projects to be look gorgeous and beautiful. All our builders high qualified with many years experience so you can trust us and put your home in the safe hand. In LDM we works hard to make all our customers happy as your reference is very important for us hope to see you soon 👍🙏
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Affixx ltd
No reviews yet
Extension Builder in London
We recently joined on my builder. Com but in Construction Industry working for 25 years . Currently working on new build house in High Wycombe. Got great deals on materials from my supplier so can do the project on very competitive price
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Genral builders
No reviews yet
Extension Builder in London
Bathroom Installation is detailing it takes time to plan all Products Varieties are Increased and there are many choices for clients .We do budget and high end bathrooms Supply and fitt .General builders
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Cosmin Badulescu
No reviews yet
Extension Builder in London
Hello, Very skilful worker with over 14 years of experience in construction. Various skills and well organized.
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RK Improvements Limited
No reviews yet
Extension Builder in London
We at RK Improvements are a family-run building company with over 35 years of experience delivering high-quality workmanship across all aspects of the building trade. Our reputation has been built on reliability, attention to detail, and a commitment to customer satisfaction. From renovations and extensions to general building works and complete property transformations, we take pride in providing a professional service from initial consultation through to project completion. We value long-term relationships with our clients and look forward to helping bring your next project to life. Head to our instagram page for past work. Search for @rkimprovements
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Bright star construction Ltd.
No reviews yet
Extension Builder in London
Hi there we are in construction industry 🏘️🏠from 13 years. We believe in quality and customer satisfaction. 🏗️
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4.1

Top rated Extension Builders

Our Extension Builders in London, are rated 4.1 out of 5 based on 18 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.