Extension Builders in Walham Green

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (19 reviews)

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Some of our top rated extension builders in Walham Green

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Maine Carpentry
Rating: 5 out of 5
Extension Builder in Walham Green
Maine Carpentry is an established building and joinery company supporting commercial and domestic customers in London and South East of England. Based in Ealing, West London, with highly trained and professional carpenters with over 15 years experience. Our aim is to provide a high quality professional service to all our clients, meet clients expectations and complete work with outstanding customer satisfaction. Our reputation is in the hands of our customers, which has seen Maine Carpentry’s name being passed from one satisfied customer to another. Find us on Instagram @mainecarpentry
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Latest review:
Carpentry- 2 Sep 2025
Maine carpentry built an electrical cupboard for us in our industrial unit, and we couldn’t be happier with the results. He was extremely reliable, completed the work within the agreed budget, and delivered excellent craftsmanship. The overall quality of his work is outstanding, and we would be very happy to recommend him to others.
"Surudo" Building & Decorating
Rating: 5 out of 5
Extension Builder in Walham Green
We are team of experienced builders provides professional execution of small, medium and larger projects, all types of refurbishment, maintenance and building services for private and business customers in London and surrounding areas. All of our work is carried to the highest standards.
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Latest review:
Bathroom Fitting- 3 Sep 2020
He is very professional and has done a good job on refurbishing my bathroom.
john d limited
Rating: 5 out of 5
Extension Builder in Walham Green
Thank you for taking time to look at our profile. We are a company with over 20 years experience in domestic and commercial installations. We are able to help from simple maintenance, fault finding and testing to complex new installations. Customer satisfaction is taken seriously as well as punctuality, neatens and honesty in doing business with our clients.
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Latest review:
Electrical- 14 Jun 2020
Greg, explored all possible solutions whilst keeping the changes to the ascetics as minimal as possible. He talked me through his plans and we booked him in. We are very happy with the work and would definitely call Greg again should I need more electrical work doing.
Lucas Build London Ltd
Rating: 5 out of 5
Extension Builder in Walham Green
Hi. My company exist from 10 years. We are doing house extensions, loft conversions and full refurbishments. I look after every my work, im always being in touch with Clients, and always happy to give advise. Im working together with my builders, that is why work going smooth and always before or on time. Please call for free quote. Thank you
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Latest review:
Lukasz and his team built a lower floor kitchen extension and downstairs WC for my wife and I. From start to finish, they were extremely professional and helpful. They were the perfect builders for first time renovators such as ourselves, guiding us through difficult decisions, while sticking religiously to their timescales. They began with helping us scope out the design, adding useful insight and advice. They then set to work, making our vision a reality. Their work ethic was superb, and we were ecstatic with the level of craftmanship exhibited. Like any building project, there were unforeseen costs and issues, but these were always handled very fairly and efficiently by Lukasz and his team. We are over the moon with the end product! I would (and have) recommend Lukasz to anyone looking to undertake building work.
A. plastering
Rating: 5 out of 5
Extension Builder in Walham Green
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.
SONIM
Rating: 5 out of 5
Extension Builder in Walham Green
SONIM LTD is a South London–based construction and refurbishment company specialising in high-quality residential projects. We deliver loft conversions, home extensions, kitchen and bathroom renovations, flooring installation, plumbing, and full property refurbishments with a strong focus on craftsmanship, attention to detail, and reliability. Whether you're expanding your home, upgrading your kitchen or bathroom, or undertaking a complete renovation, our experienced team is committed to delivering exceptional results — on time and within budget. At SONIM LTD, we believe in clear communication, transparent pricing, and building long-term trust with our clients. Your vision is our priority.
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Latest review:
Restoration & Refurbishment- 3 Nov 2024
Ion and his team were great, they worked really hard and the final result is fantastic, we are really pleased and will use them again! Ion gave lots of helpful advice.
WHG Consultancy Ltd
Rating: 5 out of 5
Extension Builder in Walham Green
Award winning builders in South West and Central London. We offer a complete range of design and build services for residential and commercial customers include new build developments, renovations, refurbishments, reconfigurations, extensions, bathroom and kitchen fitting, as well as bespoke carpentry, joinery and electrical work. We think your property is as individual as you are and help you to achieve your ideal home through our highly skilled & experienced team of designers and builders.
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Latest review:
Restoration & Refurbishment- 28 Dec 2015
I did quite a bit of research before choosing Battersea Builders. They didn’t come in with the cheapest quote but I never base my choice on price alone. And it wasn’t miles above the other quotes I got. Instead, I chose them because they ticked a lot of boxes including a) good independent reviews, b) a dedicated PM, c) qualifications, d) quick responses, e) a decent website etc. Overall, they did a fantastic job. The quality of the work and finish is really good. The PM, Tommy, was really helpful throughout and the team was very polite and conscientious. They were also on site every day as promised and didn’t play that old builders trick of getting the job and then going offsite to secure another job elsewhere (resulting in the deadline being missed). Was it perfect? No, but then not many projects are. I have a few minor comments including the fact there was a misunderstanding about the quality of bathroom cupboard I needed so the original quote was insufficient and costs had to be increased half way through the project. Despite this issue, Tommy did his best to keep the extra costs down. One other niggle was that I asked them to keep all the manuals and instructions for all the fittings but they threw them out. Not a big deal but quite annoying. Overall, it wasn’t cheap but I would use them again because the work was done to a high standard and the team were a pleasure to work with.
My Home Services London Ltd
Rating: 5 out of 5
Extension Builder in Walham Green
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!
CM Building LTD
Rating: 5 out of 5
Extension Builder in Walham Green
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.
Plastering and K rendering
Rating: 5 out of 5
Extension Builder in Walham Green
🏗️ 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
CDW building services
Rating: 5 out of 5
Extension Builder in Walham Green
I as the manager have been personally working for a family run business for ten years+ as a multi skilled trader covering all aspects of the building industry which includes: Carpentry Bricklaying Bathroom refits Kitchen refits Extensions Plastering Plumbing Electrics My business is very reliable as all work is carried out to a high standard and is thoroughly checked.
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Latest review:
Plastering- 29 Apr 2026
Quality job done in just a few days. Definitely recommend this company.
Edward Fox Building
Rating: 5 out of 5
Extension Builder in Walham Green
We are a family company in which we have been in the industry for over 20 years. We specialise in all aspects of construction such as renovations, loft conversions, new builds, and extensions. We like to give our clients affordable and competitor rates and work closely with the to insure the works and their ideas are turned into reality and make it as stress free them as possible.
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Latest review:
Restoration & Refurbishment- 31 Jul 2023
We put the ad up on Saturday morning, Ed popped over in the afternoon and gave us a quote and the job was completed on Monday! Super quick process. For a job that was causing us stress and we quickly realised we couldn’t do ourselves, Ed came in and sorted it really quickly as well as giving us advice on next steps for our redecorating. Will be contacting again when we need further help!
CHIRO Alliance Limited
Rating: 5 out of 5
Extension Builder in Walham Green
Chiro Construction covers all types of building work including major renovations, lofts, extensions, commercial conversions and bespoke carpentry. We manage all aspects of the build from inception to completion, from demolition to decorating. With a proven track record of delivering a wide range of high-end projects, we have a 98% approval rating from over 50 positive reviews. Most of our work comes from previous client referrals. Call or email us today for a chat to discuss your project.
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Latest review:
Restoration & Refurbishment- 4 Sep 2020
Octavian is a really great guy, very reliable, never disappoint, maintained good communication with us all the time. As a customer, obviously the most important part is great craftmanship, we have used other teams before and you can easily tell the difference between his work and the others. From things such as painting (you can tell they have paint and sand multiple times to provide such great finishing), tile installation (the gap between each tile is tiny, and they are very flat), Octavian’s team can get them all done. This job involves a full flat refurbishment, so the flat was completely stripped, knocked down a few walls, install new pipes / wire etc. During his work he has spotted many things that we have not noticed before. Unlike some other contractors who do not care, they will just finish what they were asked to do and leave. Octavian spotted it and recommend us the best solution for it, to provide the best outcome for the project. It is important to find someone who do care about the customer and the project. We will use him again for our future projects. Thanks. Tommy
SEASOUTH BUILDS LIMITED
Rating: 5 out of 5
Extension Builder in Walham Green
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.
GRANEROS IMPROVEMENTS LTD
Rating: 5 out of 5
Extension Builder in Walham Green
Responsibility
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Latest review:
Carpentry- 21 Mar 2026
Adi has performed an excellent job, repairing couple of garden fences, very satisfied with his work and the way he has handled the job!
Nick the Brick
Rating: 5 out of 5
Extension Builder in Walham Green
Hello everybody, my name is Nico and I’m a bricklayer with Diploma and NVQ in bricklaying, I been working as a bricklayer for the last 10 years and after been working for all the main high standard bricklayer company I have decide to start my own company. In those years I always been appreciate for my professionalism and the quality of my work, including my obsession with details,I’m confident to say that I can take any expects of brick/block work. please feel free to contact me anytime.
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Latest review:
Demolition- 26 Aug 2025
Nico did an amazing job on emptying, demolishing and clearing the shed. It was much harder than anticipated but Nico and his team went above and beyond to do the job, leaving everything clean and tidy. Thank you for your hard work. Nico was always polite, courteous and super prompt. I will be using Nico’s services again and can highly recommend him to others.

4.2

Top rated Extension Builders

Our Extension Builders in Walham Green, are rated 4.2 out of 5 based on 19 reviews from customers like you.

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

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 Walham Green 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 Walham Green who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Walham Green?

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

Find extension builders in Walham Green with MyBuilder

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

Step 2: Compare different extension builders in Walham Green

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

Step 3: Hire Walham Green extension builders with confidence

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

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

What to ask a Walham Green extension builder before hiring?

Before hiring an extension builder in Walham Green or extension building company in Walham Green, 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 Walham Green?

An extension builder in Walham Green 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 Walham Green 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 Walham Green?

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 Walham Green 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 Walham Green 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 Walham Green

Can an extension builder in Walham Green help with planning permission?

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

Many Walham Green 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 Walham Green help with materials and finishes?

Yes, most extension builders in Walham Green 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.