Extension Builders in London

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (19 reviews)

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Some of our top rated extension builders in London

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Reva Projects Ltd
No reviews yet
Extension Builder in London
We take pride in offering outstanding quality services in an array of sectors in which we operate. With over 25 years of experience in the building industry, our highly experienced team ensure a comprehensive and uniquely personal service, embracing both public and private work in the residential and commercial sectors.These include design, planning and construction of residential and commercial projects. We provide an unmatched level of service from the first enquiry until final handover.
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Jeffery and Wilkes Ltd
No reviews yet
Extension Builder in London
Jeffery and Wilkes are an award-winning, leading construction company in London.Jeffery and Wilkes have numerous positive reviews & testimonials from their previous clients. As a family run, boutique business working on London's finest properties & based in Kensington, we know how important quality is and creating beautiful, elegant spaces in our clients home.
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Jnnybyte Ltd
Rating: 5 out of 5
Extension Builder in London
At Jnnybyte Ltd, we deliver high-quality building and renovation services with a commitment to exceptional workmanship, reliability, and customer satisfaction. Whether you're updating a single room or undertaking a full property renovation, we provide a professional, end-to-end service tailored to your needs. Our services include: Full home renovations & refurbishments House extensions & structural alterations Kitchen & bathroom installations Wall & floor tiling Plastering, decorating & painting Bricklaying & masonry Plumbing & electrical work Waterproofing & insulation Decking, fencing & landscaping General building & property maintenance We believe every project deserves careful planning, honest communication, and meticulous attention to detail. We work with trusted materials, follow industry best practices, and ensure every job is completed safely, efficiently, and to a high standard. From the initial consultation through to the final finish, we keep you informed at every stage, respect your home, and leave the site clean and tidy. Our goal is simple: deliver quality workmanship that adds value to your property and gives you complete peace of mind. If you're looking for a builder who is reliable, professional, and committed to getting the job done right the first time, Jnnybyte Ltd is here to help. Get in touch today to discuss your project and receive a free, no-obligation quote.
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Latest review:
Kitchen Fitting- 16 Jul 2026
Excellent communication. Excellent service. Excellent results. Highly recommend!
SRK Constructions London Ltd
Rating: 5 out of 5
Extension Builder in London
We offer a plethora of construction services and are known for excellent k-rendering, electrical fitting, plumbing, and carpet service. We have been in the industry for more than 14 years and our work varying from small to large projects speaks about our experience in the field. We believe in creating with heart and building with the mind. We are trustworthy contractors and always strive to meet the quoted budget. Clients’ satisfaction is the topmost priority of the SRK constructions.
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Latest review:
Bathroom Fitting- 12 Apr 2022
Sandeep was the first builder who I ever met who finished job before time . His team has worked very hard and did job as per our expectations . Before this I used 3 different builders and no one finished job on time . I will recommend him for any building related job .
Beeches Building Ltd
Rating: 5 out of 5
Extension Builder in London
Beeches Building undertakes all manner of construction jobs, specialising in residential extensions and refurbishments. With loads of experience and a truly international team, we bring a unique and exciting perspective to every project.
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Latest review:
Nathan and his team were fantastic. I urgently needed a kitchen refit in a rental property between tenancies. Nathan anticipated my every needs. They were fast, efficient and paid great attention to detail. I would highly recommend them and I would use them again.
PRASH DEVELOPMENTS LIMITED
Rating: 5 out of 5
Extension Builder in London
PRASH DEVELOPMENTS LTD specialises in construction of Large Luxury New build Home, HMO & Flat developments, Extensions and Loft conversions We are team of skilled professional with 13 years of combined experiences. We pride ourselves in offering best quality hassle free service with effective pricing and timely delivery. Please feel free to contact us for any construction related information.
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Latest review:
The builders were in time and a great job done in one day when others quoted for 3 days job — all done with great professionalism and satisfaction — will give them 10⭐️
Adibc Limited
No reviews yet
Extension Builder in London
Adibc Ltd is a family run building company with over 20 years experience of the building & construction industry. We are a London based firm with a good reputation for the quality of our work – in refurbishment, conversion and extension projects as well as new build – and for the cost effective way in which we work. We provide a wide range of services including: - House Extensions - Remediation & Demolition - Conversion Of Existing Buildings Into Flats - Loft Conversions - Kitchens - Bathrooms - Brickwork - Refurbishments - Renovations - Conversions - Garage Conversions - New Builds - Steel Work - Kitchen Installations - Bathroom Fitting - Painting & Decorating - Landscaping Services - Carpentry & Joinery - Electrical & Network Services We have recently finished a full house refurbishment in Golders Green and a full refurb extension and outbuilding in Willesden Green and two new builds one in North Finchley and another one in High Barnet.
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Acumen Property Services Ltd
No reviews yet
Extension Builder in London
We undertake projects including minor & major refurbishment within the domestic and commercial fields. We have specialist personnel capable of managing cyclical repairs, voids, kitchen & bathroom refurbishments, electrical and mechanical engineering, plumbing and gas (gas SAFE), carpentry, double-glazing, plastering & decorating.
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Avion Homes Limited
Rating: 5 out of 5
Extension Builder in London
Avion Homes Limited specialises in residential new builds, extensions, refurbishments, and bespoke self-build projects across Essex, West Kent, and surrounding areas. With years of experience managing residential developments for major nationwide housebuilders, we deliver high-quality construction with a strong focus on workmanship, organisation, and reliability from start to finish. Our services include: • Residential New Builds • Property Extensions • House Refurbishments • Self-Build Projects • Construction Management As an FMB member and TrustMark registered company, we are committed to delivering professional, compliant, and well-managed construction projects for homeowners, investors, and developers.
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Build Geroge
No reviews yet
Extension Builder in London
I am an all round tradesman, electrician and plumber and handyman. I have over 30 years experience and my team are very well experienced too. We are happy to take on any job.
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M&D BUSHATI BUILDERS LTD
No reviews yet
Extension Builder in London
We do general builder jobs, We are respectful, serious and professional.
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Ergis
No reviews yet
Extension Builder in London
I’m Ergis, been on the trade with my work partner for 20 years. Happy to provide you with any information and help you out resolve any sort of repairs and problems.
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CapitalFix Construction
Rating: 5 out of 5
Extension Builder in London
Essex based construction company. Over 22 years of trade experience. No job too big or small! -Extensions -Loft conversions -Brickwork -Driveways -Landscaping -Renovations Simple. Honest. Building.
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Latest review:
Bricklaying- 5 Sep 2023
Unbelievable work, hard working. And helpful every step off the way would highly recommend!!
FFernandesConstruction
No reviews yet
Extension Builder in London
Fernandes Constructions Hi, we have been in this trade 10 years We specialise in: painting and decorating wood flooring full bathrooms, full kitchens, electrical & plumbing house extensions Conservatory
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Build Lofts
No reviews yet
Extension Builder in London
WELCOME to BUILD LOFTS LTD !!! We provide a hi standard services for building jobs, including Loft conversions, New Build , Home extensions, Roofing,Garages, Landscaping ,Rendering .All i teriors like bathrooms and kitchens , all interiors-exteriors to a very competitive price & quality.
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Rrapi LTD
No reviews yet
Extension Builder in London
Rrapi Ltd has over 20 years experience in the construction industry , a specialist contractor delivering high-quality Groundwork’s, Basement, New Build, Demolition , and Reinforced Concrete solutions, particularly for Commercial and Residential projects in London and surrounding areas. As a CHAS accredited contractor, we ensure the highest standards of safety and compliance on all sites We understand the challenges of complex, tight-access sites and pride ourselves on delivering safe, high-precision, and reliable structural work. Groundwork’s Basement’s New Build Underpinning Demolition Civil & Concrete Frames
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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.

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.