Extension Builders in Merton

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.3 (23 reviews)

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Some of our top rated extension builders in Merton

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AAJ Lofts and Extensions
No reviews yet
Extension Builder in Merton
We are a family business with over 20 years experience bringing peoples dream homes to them
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London city builder
No reviews yet
Extension Builder in Merton
London City Builders (LCB) is a professional who specialises in designing and creating stunning interiors for high-end homes. We have a deep understanding of the latest trends, materials, and techniques in interior design and can transform any living space into a beautiful and functional work of art.
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RIVIERA PLUMB LONDON
Rating: 3 out of 5
Extension Builder in Merton
Riviera plumb offer bathroom refurbishment and reactive plumbing maintenance over south east London, well established since 2018 in England, and since 2008 in Cannes ( France ) we offer a reliable service and we pride the quality of our workmanship as much as our customer service
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Latest review:
Bathroom Fitting- 21 Jun 2022
We are not entirely satisfied with Ludovic's work. Some of the tiles were not cut to the correct messurement which left big gaps in between. Worse still, the grouting was very messy and did not have a smooth finish. We will now have to get another Tiler to redo some of the tiling work. Overall, it was not a professional job and we are not very happy with his workmanship.
Blueprint Developments Limited
Rating: 5 out of 5
Extension Builder in Merton
Welcome to Blueprint Builders, where your dream space becomes a reality. Nestled in the heart of London, our team is at the forefront of design and construction innovation. We specialize in transforming spaces into luxurious living experiences, with services that include: - Elegant House Extensions - Meticulous Loft Conversions - Comprehensive Renovations - Bespoke New Builds And a wide spectrum of commercial and domestic building projects designed with your luxury and comfort in mind. At Blueprint Builders, your satisfaction is not just a goal—it's our promise. We're dedicated to bringing smiles to our clients faces through meticulous attention to detail, unparalleled craftsmanship, and a seamless client experience from start to finish. Stay connected with our journey of transformation on Instagram @blueprintbuilder. Follow us for a regular dose of inspiration through updated photos of our latest projects. Dreaming of a space makeover? Don't wait any longer. Contact us today for a complimentary site visit and a personalized quote. Let's make your vision a living, breathing reality.
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Latest review:
We recently had our 3-bedroom house renovated, along with a new rear extension build and a garage conversion, and I couldn't be happier with the results. The team demonstrated exceptional craftsmanship and attention to detail throughout the project. From the initial consultation to the final handover, they were professional, reliable, and transparent about costs and timelines. The renovation completely transformed our home, enhancing both its functionality and aesthetics. The rear extension seamlessly integrates with the existing structure, creating a spacious and light-filled living area, while the garage conversion provides a versatile space we can now use as an office. The team was approachable, accommodating any changes we requested during the build, and always left the site clean and organized at the end of each day. I was particularly impressed with their ability to stay on schedule despite some challenging weather conditions. If you're looking for a dependable team that delivers quality work, I highly recommend Blueprint.
Conessence Ltd
No reviews yet
Extension Builder in Merton
Conessence Ltd is a Surbiton-based contractor specialising in conversions, extensions, lofts, refurbishments, and restoration work, as well as the supply and installation of timber windows and doors. We focus on doing things properly — solid workmanship, clear communication, and a reliable service from start to finish. If you’re planning a project or just exploring options, feel free to get in touch. We’re happy to talk it through and provide a quote.
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A S Builders
Rating: 5 out of 5
Extension Builder in Merton
We are a family run business in construction industry since 1990, initially started by my father and now his sons have joined the business and looking to revitalised the business through the use of up-to-date technology. We undertake all types of building work through our team of skilled labour from a small job up to New Build. Our most recent job was conversion of a detached property to 7 HMO's.
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Latest review:
Extensions- 29 Apr 2026
Heera, Jagthar and team was my first personal experience with builders. Let me tell you, it was a pleasure to have them do our porch and other renovations in the house. They are so courteous, hard working and provided a great service. Firstly, I had a comprehensively written quote breaking down all of the steps required. Heera then ensured to keep me in the loop of any developments/any changes of plan required, outlining the reasons why and options, making it easy to understand and work together to completion. Their finish was to a high quality and they would always go the extra step to ensure this. I highly recommend AS Builders for any job and will definitely use them again in the future, and would recommend to my friends and family also. If you are considering them, grab a free quote and go from there... That's what I did! Thank you AS Builders for our renovations!
GM Construction
No reviews yet
Extension Builder in Merton
Our range of construction projects include kitchens & bathrooms, refurbishments, loft conversions and extensions. We project manage our work and believe that good clear communication with our clients is key to a successful project- from our first consultation visit, throughout the quotation and build process. We want our clients to be delighted with both the quality of our work, and the manner in which it is carried out. We look forward to hearing from you soon!
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Smart Environment Services Ltd
No reviews yet
Extension Builder in Merton
At —Smart Environment Services— we look after all your -domestic & commercial- Gas , Heating and Control systems. <<Our goal is to provide 1st class services with full customer satisfaction>>
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Metro builders Ltd
Rating: 5 out of 5
Extension Builder in Merton
Our company undertakes newly built projects , complete refurbishments and property extensions. We have done a wide range of work for commercial properties. For example Hotels, Restaurants, NightClubs and Spas. The company works as a main contracter and our work is of exceptional quality. We are looking forward to be working together.
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Latest review:
Ionut and his team helped me with the garage conversion at my house. My initial plan was to utilise the garage as an office space. In the initial meeting, Ionut suggested utlising the space to build a guest bedroom with ensuite as well as an office. I was slightly concerned about this as I always thought that the space was too narrow (3.1 meters) to accommodate all this. However, I am glad that I trusted Ionut’s team as the layout and design was better than expected. The extension is now the best built and most spacious rooms in the house. I would highly recommend Ionut and his team.
ASC
Rating: 5 out of 5
Extension Builder in Merton
Plumbing & heating — full professional range ASC HEATING & PLUMBING is based in London and works across London and the surrounding areas. With 6+ years in business, we offer everything from emergency call-outs and repairs to installations, leak detection, drains, bathrooms, boilers, central heating, underfloor heating and commercial plant rooms — planned so you know scope, timescale and cost up front.
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Latest review:
Plumbing- 1 Apr 2026
Aurel and his son did a great job, really knowledgeable and helped with a difficult job. Not only were the results fantastic but the guys were a pleasure to have around.
Bros con limited
Rating: 5 out of 5
Extension Builder in Merton
experience in both commercial and private property renovations specializing in Extensions, House refurbishment, Loft and Garage conversions, Driveways and Patios. Please get in touch for a friendly free-of-charge no obligation consultation. Many thanks, Teodor
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Latest review:
I received quotes from multiple builders to build a garden office, and choose Teodor as he provided the best quote. His workmanship is top quality and he built me a fantastic garden office which I am enjoying immensely. Teodor was very professional and reliable, keeping me involved throughout the whole project. I will be using his services again in the New Year and can wholeheartedly recommend Teodor.
KD&O BRICKWORK
Rating: 5 out of 5
Extension Builder in Merton
Hi, my name is Klodjan. I am a qualified bricklayer with over 15 years experience. I have worked on many building projects delivering to the highest of standards and quality. I always ensure that my customers are satisfied and happy with the work I deliver. Meticulous in cleanliness. Shortlist me for a competitive quote. Look forward to possible working with you!
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Latest review:
Bricklaying- 17 Nov 2020
Excellent work Polite ; efficient wouldn't hesitate to reccomend. Large extension
Construction Bushi Ltd
Rating: 5 out of 5
Extension Builder in Merton
Hi We are a construction company working all over London We are part of the federation of master builders The work we do is, -Loft conversion -Extension -Refurbishe -Decorating -paving -garden
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Latest review:
Extensions- 25 Jan 2022
About halfway through the project now and I have only positive things to say about these guys. They are always on time and hard working, great communicators and pleasant to deal with. The work has been top notch and their quotations have been very fair. I have great confidence things will turn out exceeding my expectations. Will update upon completion.
Jarvis Building Services
Rating: 5 out of 5
Extension Builder in Merton
We are a family run business with over 40 years experience in the building industry. We take enormous pride in our workmanship and the quality of the finished product. We are also very trustworthy and reliable and at lease 50% of our work is word of mouth or repeat custom and this is something we are very proud of.
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Latest review:
Restoration & Refurbishment- 14 Oct 2025
Peter and team did a brilliant job refurbishing our kitchen. He organised building control sign off for knocking down an internal wall. He sourced new glazing for us and designed and built a custom bench seat. He assisted us with ordering the right units for our kitchen. He was great at problem solving along the way e.g. cutting cornice to fit tricky corners. The team were courteous and left our house tidy at the end of each day.
Riobuild Ltd
No reviews yet
Extension Builder in Merton
Riobuild is an experienced and friendly professional team who offer design and build services to homeowners and commercial businesses. We believe everybody should have an incredible home to live in. A space that brings you comfort and happiness, reflects your personality and functions in a way that works with how you live. We can help you create a home like this.
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Perfect Builders Loft and Extension ltd
No reviews yet
Extension Builder in Merton
Perfect Builders Loft & Extension Expert At Perfect Builders Loft & Extension Expert, we specialize in comprehensive construction services, focusing on loft conversions and extensions. With over 20 years of experience in the industry, we have honed our skills and expertise to deliver exceptional results that meet your needs. Our commitment to quality craftsmanship ensures that every project is completed to the highest standards, providing you with peace of mind and saving you time and money. We understand that building work can be stressful, which is why we prioritize clear communication and customer satisfaction throughout the entire process. Choose Perfect Builders for your next project, and let us turn your vision into reality with professionalism and dedication.
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4.3

Top rated Extension Builders

Our Extension Builders in Merton, are rated 4.3 out of 5 based on 23 reviews from customers like you.

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What types of services are offered by local extension builders in Merton?

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 Merton 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 Merton who are available and interested can respond to your post.

Browse profiles, read customer reviews and get quotes from your chosen Merton extension builders, all before you decide who to hire.

What are the hourly rates of extension builders in Merton?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Merton 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 Merton extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Merton home extension project is likely to cost.

Find extension builders in Merton with MyBuilder

Hiring the right extension builder in Merton 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 Merton extension builders. Once your job is live, we’ll share it with home extension builders in Merton who can express their interest.

Step 2: Compare different extension builders in Merton

When you start receiving interest, review profiles of local Merton extension builders, check their previous work, and read real customer reviews. Ask about timelines, materials, and request detailed quotes.

Step 3: Hire Merton extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Merton, 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.

Merton extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Merton extension builder before hiring?

Before hiring an extension builder in Merton or extension building company in Merton, 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 Merton?

An extension builder in Merton 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 Merton 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 Merton?

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 Merton 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 Merton 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 Merton

Can an extension builder in Merton help with planning permission?

Yes, many extension builders in Merton 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 Merton handle everything from design to construction?

Many Merton 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 Merton help with materials and finishes?

Yes, most extension builders in Merton 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.