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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VCKS
Rating: 5 out of 5
Extension Builder in Merton
VCKS Professional service provided on time
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Latest review:
Tiling- 10 May 2025
Victor is excellent. Gave a competitive quote and stuck to it. Victor works quietly and thoroughly. The job was completed on time and to a high standard. I will use him again and I recommend him.
SPH
Rating: 5 out of 5
Extension Builder in Merton
With over 20 years of experience in Carpentry, building, Electrical, and plumbing services we are able to take on ambitious bespoke projects as well as provide an effective maintenance service for any plumbing or electrical issues . We can build extensions, loft conversions, fit kitchens, bathrooms, and carry out all electrical and plumbing services.
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Latest review:
Bathroom Fitting- 30 Jul 2019
Stefan did a great job gutting my en suite and putting a new bathroom in. Great attention to detail and flexible with changes some things as I wanted. Good time keeping you and would recommend!
South London Rooms Ltd
Rating: 4.5 out of 5
Extension Builder in Merton
We run a team of home Improvement professionals. We carry out all types of home improvement services. We specialise in Loft Conversion and Extentions. We are based in South London area. We aim to provide the best quality work for our customers.
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Latest review:
Extensions- 22 Dec 2022
Imran is a contractor who is personable and is trying hard, but at the end relies on different teams of builders to carry out the work. His knowledge of building work appears at time limited. In our case, this has often led to poor communication/hand-over, extensive delays and often poor (if not careless) craftsmanship. Very stressful. We now have builders (family business) finalising our project.
Lianqi Xiang
Rating: 5 out of 5
Extension Builder in Merton
ABOUT SJ CONSTRUCTIO(ENG)LTD SJ Construction comprises a team of architecture and construction professionals dedicated to delivering excellence in every project. With a focus on quality craftsmanship, we specialize in a diverse range of services including new built developments, property extensions, renovations and loft conversions etc. Having successfully delivered over 50 projects throughout London, including both residential and commercial, we offer a comprehensive suite of services tailored to meet your every project’s requirement. Architecture and Interior Design Services At our firm, we offer comprehensive architecture and interior design services, supported by our team of experienced professionals. Our approach begins with a examination of your initial concepts, allowing us to comprehend your vision for the space. Our in-house architect will translate these ideas into plans, ensuring alignment with your aspirations. Planning Package Upon your approval of the initial design concepts, our architects collaborate with required consultants, often including structural engineers and party wall surveyors, to create a comprehensive planning drawing package. This package is then submitted to the local council for regulatory approval, adhering to all regulations and guidelines. Technical Drawing Package Following the planning approval, we proceed to develop a detailed set of technical drawings essential for the construction phase. Prior to commencing construction, we engage with you to finalize crucial details, ensuring clarity and alignment with your preferences. Building Control Application （ Our dedicated team oversees the submission of the building control application to the local council after receiving planning approval. Throughout the construction process, we maintain open communication with building control inspectors, ensuring compliance with all regulatory standards. This proactive approach facilitates a smooth progression and eventual sign-off upon project completion. Construction With attention to details, our professional team undertakes the construction phase, bringing your envisioned design to real life. Building upon the collaborative efforts during the design phase, we ensure a seamless transition from concept to reality, delivering exceptional results. Handover Upon the successful completion of the project, our team delivers a comprehensive handover process. Recognizing that our commitment extends beyond project completion, we remain dedicated to ensuring your satisfaction during the snagging period. Our goal is to ensure that your new space meets and exceeds your expectations from inception to occupancy.
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Latest review:
Extensions- 13 Jan 2023
SJ Conversation is a very responsible construction company,they have done a perfect job for my house extension, they sorted many issues out for me during the work and finished all the works on time.It is worth mentioning that they clean up the site after they finish work every day,so that the home does not look so bad. Recommend.
VISUALISE CONSTRUCTION
Rating: 5 out of 5
Extension Builder in Merton
We offer professional and reliable services for a wide variety of needs, working with the dedication and craftsmanship that has earned us a reputation for excellence. Our expertise spans the full spectrum of building work including single and double story extensions, basements, loft conversions, bespoke new builds and full house renovations. Get in touch for a free quote today.
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Latest review:
Bathroom Fitting- 17 Mar 2026
Cris has done an amazing job at restoring the shower in my house and created a larger and brighter space. He has a sense what a good living space should look like and details of his work are close to complete perfection. I will work with Cris again on more projects in the house.
BPK Contractor
Rating: 5 out of 5
Extension Builder in Merton
Polish builder team with 25 years experience 15 years in UK. I started work with my father, now he is retired but i have all his knowledge that he gave me before.
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Latest review:
punctual and efficient and no task is too small / big
Console Building Solutions LTD
Rating: 5 out of 5
Extension Builder in Merton
Trusted builders who turn your ideas into reality – from small fixes to full renovations. Quality workmanship, honest pricing, and a team that treats your home like their own.” You dream, we build – reliable construction and property care you can count on
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Latest review:
Console Building Solutions Ltd recently completed my rear extension along with a new bathroom and kitchen installation. We were living in the property throughout the project, and the team carried out the work professionally without causing us any hassle or disruption. The quality of the finish and workmanship is immaculate, and the whole project was completed to a very high standard. Highly recommended.
Muhammad virk
Rating: 5 out of 5
Extension Builder in Merton
We undertake all kind of work. And our priority is to provide quality work
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Latest review:
Restoration & Refurbishment- 1 Mar 2023
Mohammed was very helpful and understanding I was very impressed about his work
DME DEVELOPMENTS LTD
Rating: 5 out of 5
Extension Builder in Merton
Hi Dan here at DME Developments Ltd, where we specialise in refurbishing domestic properties and have a wealth of experience in both small and large scale projects, work on all types of projects from simple kitchen/bathroom remodels, plumbing/electrics, all the way up to full High-end home refurbishments in and around the SW London area. If you are looking for an exceptional finish on your project, please look no further.
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Latest review:
Carpentry- 29 Jul 2023
Job well done, very professional and great manners. He did a great job within 4 hours. Thank you very much.
RELIABLE BUILDING CONTRACTORS LTD
Rating: 5 out of 5
Extension Builder in Merton
We have over 16 years experience on building site. Providing a professional and high quality service with warranty. New extension, Renovation, perfect kitchen, bathroom, plastering, decorating, electrical and plumbing .We can supply the material.
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Latest review:
Kitchen Fitting- 11 Oct 2018
Mohsen went above and beyond with our kitchen face lift. He did exactly as asked, to a very professional standard. Mohsen is very hard working, has high standards and was reliable. He also suggested ways to improve our kitchen, and corrected some previous poor work from other builders! We love the job and will definitely use Mohsen and his team again for future work.
ATICO
Rating: 5 out of 5
Extension Builder in Merton
My name is Thomas and I'm owner manager of ATICO. If you use us for your building work, I hope that your experience reflects our passion for working with the customer to create quality job at a price considered to be fair to all.
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Latest review:
Bathroom Fitting- 7 Apr 2020
Professional, knowledgeable and works to a very high standard. Highly recommended.
Morden Lofts & Extensions Ltd
Rating: 5 out of 5
Extension Builder in Merton
Morden Lofts & Extensions Ltd with over 20 years of experience, we specialise in delivering exceptional loft conversions, extensions and renovations that transform houses into dream homes. Our team of skilled professionals brings together a wealth of knowledge and expertise in the construction industry. We have successfully completed numerous projects, earning a reputation for delivering outstanding craftsmanship and exceptional customer service.
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Latest review:
We had refurbishment of separate bathroom and toilet converted into one large bathroom with new 5 piece suite including electric shower unit . Complete redesign and new plumbing and electrics done to fit requirements , floor to ceiling tiles and heated towel rails . We were very happy with the work done . Muhammad and his team were always punctual and reliable in their workmanship . They were very courteous , polite and kept us up to date as the job progressed from start to finish. The job was completed to a high standard and premises always left clean and tidy . Highly professional team and would definitely recommend .
Vagner
Rating: 4.9 out of 5
Extension Builder in Merton
I do tile, painting, carpentry among others. What differentiates me from others: quality agility and especially the price
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Latest review:
Bathroom Fitting- 28 Dec 2024
Thank you
Ncc maintenance ltd
Rating: 5 out of 5
Extension Builder in Merton
We made, electricity, plumbing, landscaping, building renovation, carpenter, tiling and paving
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Latest review:
Carpentry- 13 Jun 2022
Highly skilled and excellent work.
A-level building services
Rating: 5 out of 5
Extension Builder in Merton
Welcome, thank you for looking at my listing. We have been helping customers for more than 15 years to convert their houses into homes. It is understanding how difficult it can be sometimes to make the right decision-so let us help you. Get in touch for a chat and arrange a free quote.
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Latest review:
Bathroom Fitting- 7 Nov 2024
Wouldn’t hesitate to work with Alex again, or recommend to others. Good communication, with all trades (plastering, tiling, electrics, plumbing etc.) completed to a high standard. Reliable and always on time. Reasonably priced.
Construction Worx Ltd
Rating: 5 out of 5
Extension Builder in Merton
We come with many years experience and are highly recommended for loft conversions and extensions. Viewings on previous works can be arranged. We look forward to speaking to you and creating your dream home.
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Latest review:
Tom fit a new bathroom for us. He was very professional and did a great job. Very polite and clean builder (didn’t leave any mess!)

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.