Extension Builders in London

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

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Some of our top rated extension builders in London

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Danny builer
No reviews yet
Extension Builder in London
I’m available for work on new projects
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Stones Woodburners
Rating: 5 out of 5
Extension Builder in London
At Stones Woodburners, we offer much more than just expert heating solutions. In addition to our certified stove and heating system installations, maintenance, and repairs, we specialize in custom building services, including the creation of unique fireplace surrounds, mantels, and beams. We work closely with our clients to design and build features that complement their homes, adding both function and style. Our team of skilled professionals is experienced in every aspect of heating system care and home building, ensuring that your wood-burning stove is not only efficient and safe but beautifully integrated into your living space. Whether you’re looking to install a new stove, replace a worn-out mantel, or create a custom fireplace feature, we provide top-tier craftsmanship and attention to detail. We are fully insured, Hetas registered, compliant with all necessary regulations, and committed to delivering sustainable, efficient, and aesthetically pleasing heating and building solutions. Hope to speak to you soon!
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Latest review:
Fireplaces & Flues- 18 Dec 2025
Brilliant - would re-hire in a heartbeat! Excellent service and clear communication
Xero Construction Group
No reviews yet
Extension Builder in London
Hello and welcome to Xero Construction Group! We're thrilled to introduce ourselves as your go-to partner in bringing your construction dreams to life. Whether you're looking to build a new home, revamp your office space, or embark on a major commercial project, we bring a commitment to precision, innovation, and unparalleled quality to every project. At Xero Construction Group, we believe in a transparent and collaborative approach, ensuring that every step of your project, from planning through to completion, is handled with the utmost professionalism. Our experienced team uses the latest technology and sustainable practices to deliver efficient, high-quality results that meet your needs and exceed your expectations. We look forward to building a lasting relationship with you and turning your vision into a reality. Let’s create something amazing together!
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OJS Building & Landscaping LTD
No reviews yet
Extension Builder in London
We are a small construction company, covering all aspects of building and landscaping. We have 35 years of experience in the industry.
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IP construction
Rating: 4.9 out of 5
Extension Builder in London
Hi I have 17 years in the building trade, i am a multi trader which i can cover carpentry and handy man jobs and all wet trades i.e rendering plastering,tiling,painting and decorating. Im honest and hard working and have good communication skills with other people. All my work i carry out and finish to the highest standard.
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Latest review:
Windows & Doors (Wooden)- 20 Jul 2024
Excellent
DG Builds
No reviews yet
Extension Builder in London
At Pinnacle Build Group, we bring visions to life with quality construction and modern design. Whether it’s new homes, developments, or large-scale projects, we’re passionate about creating spaces that are built to last and designed to inspire. With a focus on trust, reliability, and attention to detail, we make the building process simple and stress-free for our clients.
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Victor
No reviews yet
Extension Builder in London
We do lofts, extensions, rendering, skimming, tailing, + more. We are an experienced and professional team.
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Building Expert LTD
No reviews yet
Extension Builder in London
Building Expert Ltd is a leading construction and renovation firm specializing in home extensions, loft conversions, and kitchen renovations. With over 20 years of industry experience, we pride ourselves on delivering exceptional quality and service, transforming homes into personalized, functional, and aesthetically pleasing spaces. Our reputation for excellence is built on a foundation of expert craftsmanship, meticulous attention to detail, and a client-centric approach. Company Overview At Building Expert Ltd, we understand that a home is more than just a structure; it’s a reflection of your lifestyle, needs, and aspirations. Our mission is to enhance and expand your living spaces through innovative design and superior construction techniques. From initial consultation to project completion, we are committed to delivering results that exceed expectations and provide lasting value.
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Harris_construcion
New on MyBuilder
Extension Builder in London
HARRIS CONSTRUCTION Building Excellence. Creating Lasting Value. At Harris Construction, we deliver high-quality building and renovation services with a commitment to exceptional craftsmanship, reliability, and customer satisfaction. Whether you’re expanding your home, transforming your property, or undertaking a complete refurbishment, our experienced team ensures every project is completed to the highest professional standards. We understand that every property is unique, which is why we work closely with our clients from the initial consultation through to completion, providing expert advice, transparent communication, and outstanding attention to detail. Our Services * Loft Conversions * House Extensions * Basement Conversions * Full Property Refurbishments * Landscaping * General Building & Renovation * Residential & Commercial Projects
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Braham Glazing Ltd
Rating: 5 out of 5
Extension Builder in London
Finance Available : We are "Braham Glazing Limited" a reliable family company in London. We provide our customers with high class and excellent quality designs and build services whether it's windows, doors, conservatory or a porch throughout the UK. We respect the individual expectations of each customer and provide tailor-made solutions with bespoke products designed specifically for each customer. We work with passion and dedication towards every job big or small.
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Latest review:
Windows & Doors (uPVC & Metal)- 3 Apr 2025
Garry and team were very knowledgeable about how the windows should be installed. They managed to retain the Victorian features of the existing windows and were perfectionist when it came to finishing each window. I am very happy with my windows and would highly recommend them.
dream build construction
No reviews yet
Extension Builder in London
Extensions,general building work,loft conversion, Garden walls, patios
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Lart Build and Design Ltd
No reviews yet
Extension Builder in London
I’m the director of Lart Build & Design, a specialist design & build contractor with several years’ experience delivering high-quality residential extensions, renovations, commercial projects and structural projects across Kent, London and Essex. We provide a fully managed service from initial consultation through to completion, covering groundworks, structural alterations, roofing, glazing, plumbing, electrics and final finishes. Every project is carefully planned and personally overseen to ensure excellent workmanship, clear communication and reliable timelines. We regularly undertake rear and side extensions, full refurbishments, bathroom and kitchen installations, RSJ works and bespoke internal layouts. All works are completed in line with current building regulations, with full insurance in place and Building Control sign-off where required. We primarily work across South East London, Dartford, Bexley, Bromley, Greenwich, Essex and surrounding Kent areas, and are happy to travel for the right projects. Our approach is simple: deliver quality work, be transparent on pricing, keep clients informed at every stage, and leave every site clean and safe. Much of our work comes through repeat customers and referrals.
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William rumball
No reviews yet
Extension Builder in London
Specialists in all brick and building work
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AJ
No reviews yet
Extension Builder in London
handyman
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R Willis construction
No reviews yet
Extension Builder in London
I have been a builder for 30 years in that time I have undertaken many varied projects from small building works to big projects from extensions to new build houses and flats. I have also done many conversion projects. No job too small or large .
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Source facilities Maintenance
Rating: 5 out of 5
Extension Builder in London
Refurbishments, Extensions, New builds, Period property, Home maintenance. Recent residential works include a new build project adjacent to a 16th century gatehouse in Epping Copped Hall, Extension and refurbishment of a house in London N5, Full refurbishment with extension in Waltham cross southfield road. We have worked for several large to medium sized companies on internal fit out contracts including a board room for waitrose and a value added facility for Wholefoods kensington.
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Latest review:
Source FM recently helped us fit out a new 8000 sq ft warehouse in Hackney. The project included installing new electricals, installing new fire and security alarms, repairing and repainting a heavily used concrete floor, redecorating, servicing the heating etc. The project had a very tight time frame and Source FM often had to work around members of our team as we started moving in while work was still ongoing. I'm pleased to say, all the work was completed in time and to a very high standard. We've since used Paul and Bill for a number of smaller projects, both at the warehouse and in our offices.

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.