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.

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 London

3594 Results

Sort by:

J Fairbairn Building Services Ltd
No reviews yet
Extension Builder in London
At J Fairbairn Building Services we have over 30 years of experience, we pride ourselves on our high quality work and bringing your project to completion on time and on budget
Get in touch
BMS BRICKWORK LTD
No reviews yet
Extension Builder in London
Highly reputable masonry specialist, 11 years experience covering the domestic, residential and commercial sector. we have established firm reputation for exceeding customer satisfaction, meeting deadlines and producing the finest quality work in the art of brickwork. We undertake a wide range of projects from low value jobs to high valued complex structures, with a diverse range of clients. All aspects of masonry work, groundwork's and project management undertaken.
Get in touch
We Trust Property Services ltd.
New on MyBuilder
Extension Builder in London
Welcome to We Trust Plumbing — your reliable local plumbing specialists and one-stop solution for all emergency and non-emergency plumbing needs. We provide professional plumbing, maintenance, installation and repair services for both residential and commercial customers. Whether you have a leaking tap, a blocked drain, a faulty toilet, a hot water problem or a plumbing emergency, our experienced team is here to help. We offer a quick-response, same-day plumbing service wherever possible and are available 7 days a week, providing flexible appointments at a time that is convenient for you. With over 15 years of experience in the plumbing trade, we take pride in delivering high-quality workmanship, honest advice, dependable service and long-lasting solutions at competitive prices. Our services include: • Emergency plumbing call-outs • Plumbing repairs and general maintenance • Leak detection and leak repairs • Faulty and replacement taps • Toilet repairs and replacements • Showers, shower valves and shower pumps • Blocked toilets, sinks and internal drains • Cold-water storage tanks • Feed and expansion tanks • Ball valves, overflows and water supply faults • Stopcocks and isolation valves • Vented and unvented hot-water cylinders • Immersion heaters and hot-water repairs • Water softeners • Leaking radiators and faulty radiator valves • Heating and plumbing repairs • Washing machine, dishwasher and other appliance installations • General domestic and commercial plumbing work At We Trust Plumbing, we understand how important it is to keep your home or business running safely and smoothly. From small plumbing repairs to larger installations and urgent call-outs, every job is completed with care, professionalism and attention to detail. If you do not see the service you require, please get in touch — we cover all aspects of plumbing and are always happy to discuss your needs and provide helpful advice. Reliable. Professional. Local. You Trust, We Deliver.
Get in touch
BCS Construction Services Ltd
No reviews yet
Extension Builder in London
With over 15 years in the construction industry covering most trades BCS Construction is able to provide a reliable and trustworthy service
Get in touch
JLF Total Solutions Ltd
No reviews yet
Extension Builder in London
At JLF Total solutions Ltd we specialize in Electrical installations, Renewable energy and building services.
Get in touch
E3 Elements Ltd
No reviews yet
Extension Builder in London
At E3 Elements, we specialize in all types of insulation work, including loft, cavity wall, and external wall insulation, ensuring your property is energy-efficient and comfortable year-round. Our experienced team delivers high-quality solutions that help you reduce energy bills and improve the overall comfort of your home or business. Alongside our insulation services, we also provide a wide range of general construction services, including renovations, repairs, plumbing, electrical work, and more. Whether it's a small repair or a large-scale project, we are committed to delivering professional, reliable, and affordable results. If you're looking for trusted contractors who put quality first, reach out to E3 Elements for a free consultation today!
Get in touch
Vilo contractors
No reviews yet
Extension Builder in London
Building contractor with 18yrs experience, undertaking all groundwork’s, bricklaying and carpentry
Get in touch
Xhoka construction limited
No reviews yet
Extension Builder in London
We do all Structural work like 1- ground works 2- brick&bllock work 3- roofing including flat roofes as well all types 4- new build house or extencions
Get in touch
Gap masonry
No reviews yet
Extension Builder in London
Any type of brickwork and stone work. Extentions. Fences and so on
Get in touch
TEST Carpentry Contractors LTD
No reviews yet
Extension Builder in London
TEST Carpentry is an established and respected carpentry firm with many years of experience. We are experts in timber fames, loft conversion, extensions, self builds and refurbishment ranging from small scale jobs to much larger projects. We can quote and carry out all aspects of your design and work with a range of specialist tradesmen, designers and engineers to offer you a bespoke and personal service to meet your building requirements. check our instagram page out TEST Carpentry.
Get in touch
IORIO SOLUTIONS LIMITED
No reviews yet
Extension Builder in London
We do Extension, Loft Conversion, Bathroom, Kitchen, Tiling, Plastering, Rendering, Lime Render, Warm Schell, Painting and Decorations, New House with Passive House systems
Get in touch
Flamur Hoda
No reviews yet
Extension Builder in London
I have more than 15 years experience in residential and commericial construction, House building, extension and refurbishment and the last completed project was house extension, garden refurbishment, painting and decorating. All aspects of building work undertaken with experience of the following: • bricklaying • plastering • painting • roofing • flooring • Tiling • garden fencing • pavement and • House renovation and extension Can create a team of experienced professional working together to get project completed. Hire more workers for bigger projects and other professionals as and when required.
Get in touch
BALJINDER Singh
No reviews yet
Extension Builder in London
We working in building trade from last 20 years got experienced team We do Extension Loft conversion Bathroom Kitchen Roof Landscaping etc
Get in touch
Reach Perfection
No reviews yet
Extension Builder in London
Electrical- painting- bricklayer and most construction work apart from plumbing and generally I am a handy man with 7 years work experience in construction
Get in touch
Daniel fissenden
No reviews yet
Extension Builder in London
Hi I'm a city&guilds bricklayer been building houses flats and extensions for aprox 40 years my work covers foundations, super structure ie brick work carpentry, and roofing patios and drives etc still working now just need morehouse to hear from you soon ,thanks dan
Get in touch
Cristian Anton Popescu
No reviews yet
Extension Builder in London
professional builder with 25 years of experience in renovations, refurbished, window and door installation, loft conversion, extensions, conservatories, kitchen installation
Get in touch

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.

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 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.