Extension Builders in Merton Park

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 Park

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CM Building LTD
Rating: 5 out of 5
Extension Builder in Merton Park
At CM Loft Conversions, we specialise in luxury loft conversions, home extensions, and full refurbishments for both residential and commercial properties across London. Our dedicated team is renowned for transforming spaces with unparalleled craftsmanship and meticulous attention to detail. Whether it’s a high-end home, a modern office, or a commercial property, we deliver projects that elevate both form and function. By seamlessly blending design innovation with practical solutions, we ensure every project not only enhances the aesthetic appeal of a space but also maximises its value and usability. At CM Loft Conversions, we are passionate about creating bespoke spaces that reflect the unique needs of our clients. From concept to completion, we focus on the fine details and provide a smooth, stress-free experience. Whether you’re looking to transform your home, expand your business premises, or refurbish a commercial unit, our team is committed to delivering results that exceed expectations.
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Latest review:
I met Charlie and his team from CM Builders Ltd when they were completing a loft extension and ground floor extension for one of my neighbours. Quotation and budget I was given an estimate subject to drawings as I was on a strict budget that I had to keep to for the build. Charlie was able to help me keep to the budget, both at the final agreed plan and during the build. The project was complex in that whilst it was a loft extension, all of the house was rebuilt. The only thing kept was the external walls and first floor rafters. Whilst the footprint of the first floor was not being changed I wanted to bring it up to current building standards with extra insulation. All of the plumbing and electrics were also replaced including a new boiler. The overall build has come in on budget, save for agreed enhancements that I did not think of at the planning stage and or building regulations such as double ceiling fire plaster boards. There were also items such as the original stairs that I wanted to keep, but Charlie was able to increase the height space in the kitchen making the worktop much more usable for tall people for a larger part of the kitchen. These were suggested to me as potential options as part of the build. Stage payments The stage payments have all been sensible throughout the build and linked to the ongoing work schedule. I have not therefore had any concerns in this regard. Quality of work This was a very complicated build as unlike the ground floor the first and new second floor are “L” shaped. The new 2nd floor included an en-suite and 2 bedrooms. Overall the house has been increased from 2 bedrooms 1 bathroom, to four doubles and 2 bathrooms. The quality of work is excellent and Charlie project manages his team to ensure that they all deliver to a high standard- if it is not done correctlt they do it again, with Charlie spotting any issues. Timeline of build This has generally gone to plan very well. As with any build you have to be realistic as things will happen outside of anyone’s control. When issues have arisen Charlie manages them to a conclusion. Also be realistic if you are having to manage to a tight budget. I had to plan for various stage receipts of cash before I could order the kitchen and bathroom items - make sure you understand how this impacts the build and availability of the work force, recognising that CM Builders have to book kitchen fitters and plumbers. CM Builders are also very helpful in that they have sorted out issues with the brick work of my freestanding garage (nothing to do with the build) and also a neighbour’s wall that could have been dangerous to the public, should it have failed. Conclusion The whole family are very pleased with the outcome and we now have the equivalent of a brand new house that has been built to a very high standard. This has definitely been worth doing both from a valuation perspective and quality of life perspective. I would not hesitate to instruct Charlie and his team again.
AMG360LTD
No reviews yet
Extension Builder in Merton Park
MY COMPANY UNDER TAKES ANY RESIDENTIAL WORK. GENERAL BUILDING WORK TO MAINTENANCE WORK. WE ARE EXPERIENCED IN EXTENSIONS, LOFT CONVERSIONS, REFURBISHING COMPLETE DWELLINGS ETC.
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Plastering and K rendering
Rating: 5 out of 5
Extension Builder in Merton Park
🏗️ General Builder • Roofing • Extensions • Refurbishment – London Looking for a reliable and professional builder in London? We provide high–quality construction and renovation services at competitive prices. ✅ Plastering & Insolation Silicone Rendering ✅ Our Services Include: • General Building & Refurbishment – Full house renovations, kitchen & bathroom fitting, plastering, flooring, painting & decorating. • Extensions – Single & double-storey extensions, side returns, rear extensions, loft conversions, and garage conversions. • Roofing Services – New roof installations, flat & pitched roofs, roof repairs, waterproofing, guttering & fascias. • Structural Work – Brickwork, concrete, foundations, and load-bearing alterations. 💪 Why Choose Us? • Experienced team with over 16 years in the trade • All work guaranteed & fully insured • Competitive, transparent pricing • Clean & reliable service – we treat your home with respect • Free, no-obligation quotes 📍 We cover all London postcodes – Central London,North, South, East & West.
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Latest review:
Plastering- 16 Mar 2020
Almed and his team came over to see the two bungalows and gave me a quote and was more reasonable than other quotes I had previously. Almed started the job and stated exactly what he was going to do from the beginning to the end of the job. He is a very professional and knowledgeable person and he and his team did a outstanding plastering job on my two bungalows and I’m very happy with the job and will highly recommend him for future projects. Thanks Zai
A. plastering
Rating: 5 out of 5
Extension Builder in Merton Park
Hi. My name is Fatos. I have been in construction for over 17 years. We undertake rendering, plastering and painting jobs. High standard finish in very competitive prices. We also do loft conversion,roofing, plumbing, electric, tiling, extension ect. Our prioritie is to get the job done in very high quality
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Latest review:
Plastering- 22 Oct 2024
We needed to plaster our house ASAP and Fatos completed it in a short time. The house looks amazing, he was quick, efficient and was a great communicator. I would highly recommend him.
My Home Services London Ltd
Rating: 5 out of 5
Extension Builder in Merton Park
My Home Services London Ltd is a professional construction and home improvement company specialising in bathroom and kitchen renovations, house extensions, loft conversions, and full property refurbishments. We also provide expert gas, electrical, electronics, and smart home (domotics) installation and maintenance services. Our team delivers complete, high-quality solutions designed to transform homes by combining functionality, comfort, style, and modern technology. From small upgrades to large-scale renovation and extension projects, we work with a safe, reliable, and professional approach tailored to each client’s needs and vision.
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Latest review:
Handyman- 29 May 2026
Absolutely fantastic service, they did a great job!!! Friendly and professional. I look forward to having them back for more jobs. 100% highly recommend!! Thank you very much!
Red Moon Design
Rating: 5 out of 5
Extension Builder in Merton Park
Welcome to Red Moon Design & Build. We are a London-based building and interior renovation firm dedicated to high-quality property transformations. 10 years of experience delivering full home refurbishments, custom carpentry, bathroom/kitchen installations, and garden transformations. Based in London, serving Greater London and all surrounding areas within the M25. Complete interior refurbishments, door fitting & skirting, kitchen/bathroom tiling and fitting, roofing, patio paving, and landscaping. We pride ourselves on craftsmanship, clean working environments, and complete price transparency with no hidden costs. Whether it’s a full property renovation or a specialized building project, we deliver reliable and top-tier results.
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Latest review:
I couldn't be happier with my brand new kitchen cabinets! My old kitchen was in completely unusable shape. The team dismantled the old setup and custom-built the new cabinets from scratch to my exact preferences, paying close attention to every single measurement. Truly magnificent craftsmanship—I highly recommend them!
JM Build Ltd
Rating: 5 out of 5
Extension Builder in Merton Park
We are team of professional builders specializing in refurbishments, loft conversions and extensions.Do not hesitate to contact us for a no obligation quote. We are also proud member of Checkatrade. You Dream It We Build It.
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Latest review:
Extensions- 14 Jul 2021
Juro and his team completed a total refurbishment of our house that included removing all internal walls, along with a double story side extension, a huge job involving lots of steels, re-roofing, new construction, new bathrooms and kitchen, new windows and rendering along with all the plumbing and electrical work and decoration. They did the most incredible job, working efficiently, adapting to any problems that came along and working really hard to create the best finish possible at the budget we had. Despite the pandemic arriving just after the demolition stage, they didn’t miss a day on site, and worked tirelessly to get materials to keep the project moving. Incredibly they still managed to finish the project on schedule and to a standard that was exceptional. Juro is honest and upfront, didn’t ever add costs or ‘unforeseeables’ and was an absolute joy to work with. He also stuck to a very clear payment schedule that was easy to follow and always meant we only paid when we were absolutely 100% happy. My only reservation in writing this review is that I would like to selfishly hang on to him and keep his schedule clear for future jobs with family and friends!
Antonio travaglia junior
No reviews yet
Extension Builder in Merton Park
The main point is to provide a high quality service and see the customer happy, we work tirelessly for the best service and quality! We always work with the best products available and the best price in town! So if you are looking for a good job at a fair price, contact us!
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SEASOUTH BUILDS LIMITED
Rating: 5 out of 5
Extension Builder in Merton Park
At Seasouth Builds, we bring over 5 years of hands-on experience in the building and construction industry. Known for our loyalty, reliability, and attention to detail, we take pride in delivering high-quality workmanship on every project
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Latest review:
Tiling- 24 Sep 2025
I hired seasouth builds because not only did he give a really reasonable quote, but he also had knowledge of tiling over retrofit underfloor heating - which other tilers seemed to be really hesitant to work with. The job was done to an excellent standard - he’s a real perfectionist. It did take a bit longer than expected, due to some floor level issues which he didn’t account for when he quoted. I was really worried about the price increasing out of my budget when we started running over time, but I was so grateful to find that he was a really honest guy who stuck to the agreed quote and didn’t try to make it my problem one little bit. He was polite and friendly throughout the whole job, turned up whenever he said he would, and kept in constant contact. Really honest (I happily left him unattended in my property). Customer service was excellent, nothing was too much trouble. 10/10 would recommend.
CJ Carpentry
Rating: 5 out of 5
Extension Builder in Merton Park
We are joiners by trade, passionate on what we do over the years. We have combined over 32 years of experience on carpentry/joinery itself. As there is always demand, we started delivering any type of construction work, full house refurbishment, kitchens, bathrooms etc. Always preserving our high quality of work, honesty, professionalism. Fully committed to anything we can come across, always find clients, architects solutions so we can achieve everyone’s dream, expectations.
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Latest review:
Carpentry- 18 May 2022
Very professional and friendly tradesman. Work was carried out perfectly and I couldn't recommend him high enough. Brilliant work ethic and he went the extra mile to carry out the works impeccably. Privellage to work with him.
MF Williams Brickwork
Rating: 5 out of 5
Extension Builder in Merton Park
Time served Bricklayer for the past 35 years, Experienced in all types of Brickwork , Weather Pointing, Hard Landscapes etc references can be supplied .
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Latest review:
Bricklaying- 3 Feb 2018
I am currently using Mark for my brickwork and he is spot on. Always turns up, polite, hard working and very good at his job.
Nazarie Petruneac
No reviews yet
Extension Builder in Merton Park
Hello everyone, we are a bricklaying gang of Ukrainians! Having worked and lived in London for years now we are really sorry to see what is going on at home at the moment. To help and do our part in defeating the old idiot despite being far from home we decided to take extra job on weekends and the money made will be sent for the needs of Ukrainian army fighting now keeping the occupants from mooving forward!
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Michael Fitzpatrick
No reviews yet
Extension Builder in Merton Park
We undertake all aspects of building work. We specialise in extensions, conversions and refurbishments. All work is carried out and completed to an extremely high standard.
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Ademi’s
No reviews yet
Extension Builder in Merton Park
Reliable and experienced builder specialising in full home and flat refurbishments. Offering high-quality kitchen installations, flooring solutions, and electrical work, all completed to a professional standard. From small upgrades to complete property renovations, every project is handled with attention to detail, clear communication, and a focus on customer satisfaction. Skilled in transforming spaces into modern, functional, and stylish environments, delivering work on time and within budget.
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Tudor Holdings Group Limited
Rating: 5 out of 5
Extension Builder in Merton Park
We are a family business with direct employed tradesman. Our work is to the highest of quality, we always go that bit extra for our customers. We have always worked from recommendations, just completed a double storey side, rear ext, loft conversion in Carshalton. We specialise in structural works, refurbs, loft and property extensions. We can offer a full list of references and often, inspection of our work. We always aim to give full breakdown quotations and fixed prices when possible.
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Latest review:
Extensions- 18 Jan 2023
We highly recommend THG building solutions, they have built a double story extension for us, and from start to finish they were always on time, polite and professional on every aspect. Most importantly they delivered what was promised according to the initial budget and on time! No delays or surprises, just honest and reliable service. We have been approached by several neighbors to comment on how beautiful the extension looks and how quickly it was all done! Overall we’re very happy and glad that we chose Charles and his team as our builders.
ALSOAA CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in Merton Park
⸻ Hello! I'm [mohammad], owner of [alsoaa construction ltd]. We have years of experience in home renovations and construction, and I pride myself on providing high-quality, exceptional customer service. Whether you need kitchen and bathroom renovations, painting and decorating, or custom tiling, my team and I are committed to making your vision a reality. We listen carefully to your needs and offer honest advice to ensure long-lasting results.
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Latest review:
Kitchen Fitting- 12 Jul 2026
Ali was brilliant at fitting my tap - it was more complicated than we thought and he stayed longer to make sure it was done, and even came back the next day to fix something that had gone wrong. Mohammad was brilliant, helping me with every enquiry and always answering really quickly, and patiently - super helpful. Overall, excellent - really happy - would definitely hire again.

4.3

Top rated Extension Builders

Our Extension Builders in Merton Park, 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 Park?

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

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

What are the hourly rates of extension builders in Merton Park?

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

Find extension builders in Merton Park with MyBuilder

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

Step 2: Compare different extension builders in Merton Park

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

Step 3: Hire Merton Park extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Merton Park, 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 Park extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Merton Park extension builder before hiring?

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

An extension builder in Merton Park 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 Park 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 Park?

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 Park 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 Park 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 Park

Can an extension builder in Merton Park help with planning permission?

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

Many Merton Park 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 Park help with materials and finishes?

Yes, most extension builders in Merton Park 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.