Extension Builders in London

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (19 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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j s brickwork
No reviews yet
Extension Builder in London
( J S brickwork) Hi it’s brickwork company Can do all sort of brickwork ,block-work ,stone ,masonary My prices are normal and give you best quality of work. Always on time job Just give me a call for any free quotation - Any other building work also undertaken Roofing ,bathroom , painting
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HMR Builders Ltd
Rating: 5 out of 5
Extension Builder in London
I have 19 years experience in the building trade. We can fit new bathrooms, kitchens, build extensions, plumbing, electrical work, staircases, tiling, plastering and most other jobs you may require doing around your house. We have also completed HMO’s, worked with many letting agencies and landlords directly. We are reliable and trustworthy and will work with our customers to make their ideas and dreams a reality. I provide free quotes and am fully insured. I can come and look at a job at a time to suit you including evenings and weekends.
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Latest review:
Conversions - General- 9 May 2026
Melvin & his team were amazing. They were always on time & kept the place neat & clean. He finished the work before time & guided us with all council approvals needed. His attitude & attention to detail was amazing. He is very friendly & approachable & helped us with many other things across the house. He is very trustable. We recommend Melvin to everyone & he will be coming back to do more work for us.
Bowmont building services
No reviews yet
Extension Builder in London
We are a building and construction company with over 25 years experience. We can undertake complete refurbishment of residential properties, including structural alterations, extensions and substantial conversions. We provide a complete end to end service & professionally manage projects working with (if required) your architects. Whether it is a small extension, refurbishment or a major reconfiguration we have the experience and capability to complete the works to the highest standards.
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Dorchester Property Developments Ltd
No reviews yet
Extension Builder in London
As a company, we cover all aspects of building works from small repairs to large scale refurbishments and builds. Over the last 12 years we have built several new build homes, carried out countless extensions and refurbishments for our clients and flipped several properties for ourselves.
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Eurocenter-online Ltd
No reviews yet
Extension Builder in London
I wanted to become a construction worker since I was a child and I became one. I like what I do and that's why I do it very professionally to satisfy every client who chooses me.
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K&L building services
No reviews yet
Extension Builder in London
Me and my work partner has been in the construction industry for a total of 15 years. We are based in Enfield, North London but are also able to travel up to 60 miles for any jobs. Our special skills are extensions, driveways, fencing and full home renovations. You should definitely hire us as we are a reliable team and we always make sure each job is done to perfection. We prioritise in making our customers happy and satisfied with any job no matter how big or small.
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SUFASOLUTIONS Ltd
No reviews yet
Extension Builder in London
Hello from SUFASOLUTIONS LTD,We are a family running I would welcome the opportunity to meet with you, understand more about your work with our organization, and discuss how we can work together most effectively. Please feel free to contact me to arrange a meeting. I'm looking forward to meeting with you in the future. FREE QUOTE
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Vj construction services
No reviews yet
Extension Builder in London
Hi I am a professional painter and decorator.I have been working as a painter and decorator for 20 years and I provide a very good service.My customers are very happy after I finish the job.So far I never had any complaints from any of my customers.I am very honest, trustworthy and reliable.
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Gagandeep singh
No reviews yet
Extension Builder in London
M Gagandeep work as the main work of plumber
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Rapid Construction Ltd
No reviews yet
Extension Builder in London
We are a general building company specialising in interior and exterior renovations including new build extensions and loft conversions. We pride ourselves on the high standard of work with attention to details and the relationships we have with our customers.
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Temple electrics
No reviews yet
Extension Builder in London
Temple Electrics is a family run business
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Barons & Co Construction LTD
No reviews yet
Extension Builder in London
At Barons & Co our mission was always to build. Not a portfolio of prestigious properties, but a reputation for leadership in world-class projects. Whilst every project is unique, the philosophy behind each is unwavering. We craft environments intrinsically beautiful and faultlessly functional. From helping you form a bespoke design to turning the key in the door.
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RRV Construction
No reviews yet
Extension Builder in London
Hello ,my name is Radu,i am bricklayer,i do any construction job around your house
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Lakha bricklayer
No reviews yet
Extension Builder in London
Hi,this is Lakha bricklayer am professionaly do brickwork.we carry any type of brickwork extension,porch,garden wall etc.we mostly try to give customer amazing jobs cos they money. Don’t hesitate call me if you need good and responsible bricklayers!
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Britania Building Services
No reviews yet
Extension Builder in London
I’m a self employed builder with vast knowledge and experience for over forty years. I’m a multi trade person from construction, renovations, loft conversions and extensions etc. I’m an electrician, plumber, kitchen fitter, tiler and many other trades. My past experiences being, BT Engineer, Coca Cola Engineer, Sound Engineer, BBC sound engineer and few other companies I worked for.
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Danlea Construction Ltd
No reviews yet
Extension Builder in London
Danlea is primarily a construction company in London specializing in renovations, loft conversions, and property extensions. In addition to our construction expertise, we offer professional UV printing directly on walls, utilizing innovative technology. Design & Build UV Wall Printing Extend The Space Handyman Hire Recycle As a prominent Construction Company London, we pride ourselves on delivering exceptional building and renovation services to our diverse clientele. Our expertise encompasses a wide range of projects, from residential renovations and loft conversions to large-scale commercial developments. We understand the unique architectural landscape of London and are committed to enhancing it with our innovative designs and superior craftsmanship. Our team of skilled professionals works diligently to ensure that every project is completed to the highest standards, adhering to strict safety regulations and environmental guidelines. With a focus on customer satisfaction, our Construction Company London strives to transform our clients’ visions into reality, creating spaces that are not only aesthetically pleasing but also functional and sustainable.
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4.2

Top rated Extension Builders

Our Extension Builders in London, are rated 4.2 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.