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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CHL IMPROVEMENTS LTD
No reviews yet
Extension Builder in London
North London based 10 years of experience
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Antonio travaglia junior
No reviews yet
Extension Builder in London
The main point is to provide a high quality service and see the customer happy, we work tirelessly for the best service and quality! We always work with the best products available and the best price in town! So if you are looking for a good job at a fair price, contact us!
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Blue&Rock Developments Ltd
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Extension Builder in London
Blue&Rock Developments Ltd is a modern, reliable construction and development company dedicated to delivering high-quality building solutions across the UK. We specialise in residential and commercial projects, offering a complete service from groundwork and structural works to full property development. Built on strong values of quality craftsmanship, transparency, and professionalism, Blue&Rock Developments brings together skilled tradespeople and experienced project management to ensure every project is completed safely, on time, and to the highest standard. Whether it’s a new build, extension, renovation, or full-scale development, our goal is simple: to provide durable, well-designed spaces that add long-term value for our clients. At Blue&Rock Developments Ltd, we take pride in clear communication, attention to detail, and a commitment to excellence in every stage of construction.
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Sorin
No reviews yet
Extension Builder in London
Refurbishment
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George The Builder
No reviews yet
Extension Builder in London
Reliable and experienced builder specialising in extensions, renovations, brickwork and general building services. I deliver high quality workmanship with attention to details, clear communication and projects completed on time and within budget. No matter the size of the job, i work professionally and treat every property with care
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Sogut
No reviews yet
Extension Builder in London
Company Description We are an experienced team providing high-quality building and home improvement services. We complete our projects safely, on time, and to standard building regulations. Our services include: • House extensions & garden rooms • Full house renovations • Roofing • Plumbing & electrical work • Wall & floor tiling • Door fitting • Porches & patios We deliver clean, safe, and reliable work for every project. Contact us to discuss your job.
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LG builds
No reviews yet
Extension Builder in London
Experienced builders with a focus on quality and attention to detail. Delivering reliable, tailored solutions for every project. Always aiming to exceed expectations.
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handyman
No reviews yet
Extension Builder in London
my experience work is 15 years at construction skills.
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Andrei
No reviews yet
Extension Builder in London
My occupation building. I am working carpenter 5 years. I building loft conversion Extension any first and second fix.
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Vadim
No reviews yet
Extension Builder in London
Groundworker with experience and 360, dumper and roller tickets
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AM Painter & Decorator
No reviews yet
Extension Builder in London
I have over 20years experience as a painter and decorator. All my work is finished with a high quality, work is finished on time. I take great care in my work so that my customers are satisfied and come back to me. Previous work has involved painting houses, flats, apartments and offices. In and around London.
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QC Gabriel
No reviews yet
Extension Builder in London
Full Refurbush,Roof,Loft Convertion,Electric,Plumber,Brick work,Garden...etc
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Md outdoor
New on MyBuilder
Extension Builder in London
Welcome to MD Outdoor Solutions! We provide reliable and professional outdoor services across London. Our services include: * Paving & Patios – Driveways, pathways and garden paving. * Fencing – Fence installation, replacement and repairs. * Garden Clearance – Removing garden waste, rubbish and unwanted materials. * Groundworks – Concrete work and general outdoor improvements. We take pride in delivering quality workmanship, fair prices and a friendly, reliable service. No job too small! Contact us today for a FREE, no-obligation quote. MD Outdoor Solutions – Your outdoor projects, our priority!
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Eddie
No reviews yet
Extension Builder in London
Specialised as kitchen fitters , our service includes a pre-fit visit making sure what has been designed will ne fitted perfectly in the kitchen, advises and quotes, measuring and assembling the new kitchen, plumbing and electric connections, floor and wall tiles, plastering, painting and decorating.
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Nexus Lofts And Extensions Ltd
No reviews yet
Extension Builder in London
Nexus Lofts and Extensions based Ealing west London family running business specialist on lofts and home extension ! Local homeowners trust Nexus because we put your needs first. We’re committed to transparency, quality, and delivering projects on time and within budget. Our reputation across Ealing & West London is built on honest workmanship and a genuine dedication to customer satisfaction. If you’re looking for dependable builders who make every step easy, we’re here to help bring your vision to life. Why Choose Us Build with confidence backed by our 10-Year Warranty. At Nexus, we take pride in delivering high-quality workmanship that stands the test of time. Our long-term warranty protects your investment and gives you peace of mind, knowing your project is built to last. Reliable service and durable results — that’s the Nexus promise. 10 Year Warranty For any enquiry please Get in touch
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J&J construction
Rating: 5 out of 5
Extension Builder in London
We have a skilled team to do the roofing and building, we do all kind of roof work like pitch roof Slate roof, glass fiber roof, felt roof, cold deck and warm deck and we carry the work to comply with the regulations and with the quality We also have skilled and professional workers to work in house extensions and loft conversions and full house renovations all other building work is undertaken like plumbing electric plastering rendering and painting
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Latest review:
Roofing (Flat)- 20 Dec 2025
Professional quick, happy with the job, will definitely use them again

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.