Extension Builders in Merton

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.3 (22 reviews)

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Some of our top rated extension builders in Merton

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INNOVATE BUILD GROUP LTD
Rating: 4.8 out of 5
Extension Builder in Merton
I have over 20 years of experience in the construction industry. I am highly customer-focused and quality-driven, always aiming to complete jobs to the highest standards. My key goal is to ensure every project meets /exceeds customer expectations, delivering outstanding results every time.
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Latest review:
Extensions- 7 Jun 2026
Zilvinas and the team at Innovate Builders were outstanding from start to finish. We hired them to build our two-storey side extension. Zilvinas was open, professional, and fully committed throughout the project. He was always available to answer questions, offer advice, and guide us through each stage of the build. His team worked hard and delivered a high-quality finish, all while keeping the project on schedule and within budget. As this was our first major building project, we relied heavily on Zilvinas's expertise and guidance. His knowledge, practical advice, and problem-solving skills were invaluable and made what could have been a stressful experience feel smooth and manageable. We are absolutely delighted with the result and would not hesitate to recommend Innovate Builder. As I said it was our first ever big project, we had heard many horror stories but are so grateful to have found Zilvinas and his team.
B&K
Rating: 5 out of 5
Extension Builder in Merton
At B&K Builders, we are more than just a construction company – we are a family team dedicated to delivering exceptional quality and unparalleled customer satisfaction. With years of experience and a passion for craftsmanship, our professional builder team takes pride in transforming your visions into reality. Who We Are:We are a close-knit family of builders who believe in the power of collaboration and commitment. Our unity and shared values drive us to consistently achieve excellence in every project we undertake. From the first consultation to the final touches, our team works diligently to ensure that each detail reflects our dedication to quality and precision. Our Mission:Our primary goal is simple: to make our customers very happy. We understand that your home or business is a significant investment, and we strive to exceed your expectations at every step. Whether it's a new construction, a renovation, or a custom project, we bring our expertise, integrity, and creativity to deliver results that not only meet but surpass your aspirations. Why Choose Us:Quality Craftsmanship: Our team is committed to using the best materials and techniques to ensure that every project stands the test of time. We pay meticulous attention to detail, ensuring that the finished product is not only beautiful but also durable and functional. Professionalism: From the initial consultation to the final inspection, we maintain the highest standards of professionalism. Our transparent communication, punctuality, and respect for your property and time are cornerstones of our service. Customer-Centric Approach: Your satisfaction is our top priority. We take the time to listen to your needs, provide expert guidance, and tailor our services to suit your unique requirements. Our goal is to create spaces that you will love and cherish for years to come. Family Values: As a family team, we bring a sense of trust, reliability, and personal touch to every project. We treat your project as if it were our own, ensuring that the final outcome reflects the care and dedication that only a family can offer. At B&K Builders, we are committed to building not just structures, but lasting relationships with our clients. Partner with us, and experience the difference that a passionate, professional builder team can make. Let's build your dreams together.
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Latest review:
Benjamin and his team did a fantastic job on my property building a 6m by 6m Extension walls in only 2 days, it was done ahead of time and on budget. He was very conscientious and nothing was to much trouble. Done all the pictures of each step along the way needed for Building Control Guy. The quality and workmanship was first class and I would definitely recommend him for all types of building/refurbishment work.”
H & F London Limited
No reviews yet
Extension Builder in Merton
H & F London is a specialist construction company based in Hertfordshire & West London. We’re known for providing groundwork solutions & new builds for a variety of clients across London and Hertfordshire.
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Graal Structural Engineering Ltd
Rating: 5 out of 5
Extension Builder in Merton
We offer Structural Desing and Calculations for New Build, Extensions, Loft Conversions, etc. Detailed drawings and calculations for Building Control. We offer one-stop-shop services including, planning applications, architectural & structural design, cost estimations, project management and construction works.
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E H Carpentry
Rating: 5 out of 5
Extension Builder in Merton
At EH Carpentry we offer detail-orientated and meticulous carpentry, with a wealth of experience in executing fixtures and fitting installation for residential properties. With nearly 20 years experience.
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Latest review:
James fitted new door linings frames and fire doors to upstairs of my house. Completed the work quickly, to high standard and was very happy with the price and professionalism
Kairos Construction Ltd
No reviews yet
Extension Builder in Merton
We undertake all kinds of renovations and new build extensions. We specialise in bathrooms and kitchens with over 15 years working experience in the industry. Myself and my multi skilled builders are always polite and treat our customers with respect and are always willing to get the job done.
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Skyway construction ltd
Rating: 5 out of 5
Extension Builder in Merton
I am working in construction from 15 years . I have a good and experience team. I recently renovated the 3 bedroom house with a 6 meter back extension. I mostly do loft conversion, back extension, renovate the old house , back garage etc.
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Latest review:
Handyman- 22 Jan 2018
Saravjeet was excellent throughout both in his communication and flexibility with the number of small jobs that we needed completing throughout the house including repairing our kitchen cabinets, garden fence and electrics. I would recommend his services wholeheartedly.
4CS Building Solution
No reviews yet
Extension Builder in Merton
4CS Building Solutions, While we're experts in HMO development,From breathing new life into homes through meticulous refurbishments to crafting stunning bathroom and kitchen renovations, we're here to transform your vision into reality. Need extra space? Our house extensions unlock endless possibilities, while our loft renovations add charm and functionality. No project is too small – we're your trusted partner for all your construction needs.
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Castle view construction Surrey Ltd
No reviews yet
Extension Builder in Merton
Castle view construction Surrey Ltd is a building and refurbishment company delivering high quality construction services across residential and commercial projects. We specialise in full property renovations extensions structural works fit outs and maintenance
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Kegel LTD
Rating: 5 out of 5
Extension Builder in Merton
Hello 🧸we are the Kegel team of 4+ guys easy going and like what we are doing - Block , brick work , foundations , drain works , roofing . New house , extensions , garden walls, restorations old houses , re pointing , GRC clading , GRC bands , stone works , re pointing More them 15 years on large constructions. We working quick , without complain but if need to do a push We can get more lads as much as need it to finish on time. We got Electrican , Plumbers , carpentry available as well.
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Latest review:
Bricklaying- 19 Nov 2019
Alex is a polite professional who knows his job. He did a good job for me. I can recommend him.
Lombardo Constructions Ltd.
No reviews yet
Extension Builder in Merton
Our target is the full client satisfaction. Lombardo Construction has been trading for more than thirty years in the construction and restoration market. We have been always oriented towards the research and the innovation during design and construction phases with a precise care for details and quality control process. The company is able to offer to the client the know how in restoration, renovation and new built works for the required M/E services along with the statutory certification.
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Quote Builders Ltd
Rating: 5 out of 5
Extension Builder in Merton
We specialise in residential and commercial construction, refurbishment and restoration. We also provide handyman and access solutions. We have a team of 12 CIS registered and qualified workers. We work on excellence and look to provide homeowners and commercial business owners the best job possible up to building regulations standards every time at a very competitive price. Based in the southeast region we look to target South East England.
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Latest review:
James and his team of builders (quote Builders) gutted and fitted our bathroom. James helped us to choose fixtures and fittings ( which we were grateful for especially as the recomended shower we chose is AMAZING ) We were extremely impressed with his workmanship and found him and his team to be very professional, reliable and punctual. We have received great comments when family and friends visit and see our new bathroom, and we have recommended quote Builders to them. Thank you James and his team. Definitely using them to remodel our kitchen.
SURREY HILLS EXTEND AND RENOVATE LIMITED
Rating: 4 out of 5
Extension Builder in Merton
At Surrey Hills Extend & Renovate we promise Quality and Craftsmanship. We take pride in delivering superior quality in every detail of our work, ensuring long-lasting and visually appealing results. We have a Customer-Centric Approach and your satisfaction is our top priority. We work closely with you, understanding your needs and preferences, to create spaces that truly reflect your vision.
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Latest review:
Conservatories- 17 Feb 2025
If I could give 0! Surrey Hills Extend and Renovate Limited is a company which is a scammer. Thye have scammed 80 Plus people. Do not use them. Now thye have declined to start workk and the Directors are going for Voluntary Liquidation after taking away millions. MyBuilder should have vetted the company before putting on their site
RK Building
No reviews yet
Extension Builder in Merton
RK Building we are here to build your dreams and make real
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jawad
Rating: 5 out of 5
Extension Builder in Merton
Skilled and dependable worker with experience in wood construction and roof installation. I build and install wooden posts, frames, and plastic or timber roofing. I take pride in delivering strong, clean, and professional results. Friendly, punctual, and committed to customer satisfaction.
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Latest review:
Jawad was very professional and hard working. Our corner has said if he could give 6 stars he would! I reccomend him highly!
Phillip Thomas O'Gorman
No reviews yet
Extension Builder in Merton
Father and Son alliance, based in south London with over 30 years of Bricklaying experience. All aspects of brickwork, garden walls, extension and repointing undertaken, free quotations provided, and a friendly efficient service.
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4.3

Top rated Extension Builders

Our Extension Builders in Merton, are rated 4.3 out of 5 based on 22 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.