Extension Builders in New Malden

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (22 reviews)

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Some of our top rated extension builders in New Malden

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ritz builders uk ltd
Rating: 5 out of 5
Extension Builder in New Malden
Ritz Builders UK Ltd can take care of any property renovation or house extension, from complex double basement developments to a new builds. Our builders have worked on various type of properties across UK, giving them a new light and converting them into modern and contemporary living spaces. Our professional construction team, who come supported by a dedicated workforce, are well regarded by commercial and residential property developers.
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Latest review:
The builder was reliable and dependable. Work was neat and to taste .
Jc carpentry services ltd
Rating: 5 out of 5
Extension Builder in New Malden
My name is John cox and I am the managing director of Jc carpentry services ltd…. We specialise in Main contracting/ Sub contracting/ Loft conversions/ Extensions/ Kitchens/ Bathroom refurbishment.
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Latest review:
Carpentry- 15 Aug 2025
I would 100% recommend John and his team. We have been really unlucky with 3 other builders taking off with our money and not completing the work. John is very professional, took on someone else’s mess and done a brilliant job. We wanted exposed oak rafter detail and the team done an excellent job. John is very good at problem solving on the spot when there are issues, he is very approachable and keeps you updated with the progress throughout the job. What he has been good at is also talking through different options with us before doing different sections of the work and he does not take short cuts. If you need excellent honest builders John is your guy! We will get the decorations done and post the end product.
Editas LTD
No reviews yet
Extension Builder in New Malden
We are a company specialises in both residential and commercial projects, including new builds, loft conversions, extensions, roof conversions, commercial fit-out and refurbishments. Our service cover electrics, plumbing, gas, A/C, ventilation, brick laying, wood works, windows, carpentry, architectural drawing, 3D design rendering and all kinds of decorative works. Please contact us for a free site survey and quote. We look forward to working with you.
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Velvet Construction
Rating: 5 out of 5
Extension Builder in New Malden
About Velvet Construction: 5+ year experience in the building trade. CSCS Black Card Holder All health and safety certificates. Velvet Construction has a large team of qualified tradesmen, delivering a high standard of workmanship at a competitive price. For more information on our services please contact us. We offer free quotations and all work is insured and guaranteed.
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Latest review:
Restoration & Refurbishment- 10 May 2019
Velvet Construction are a friendly and professional contractor who work hard to deliver an excellent service. We have worked closely with them and their practical and dynamic approach is refreshing to work with in a professional capacity and we would highly recommend them. Their quality of workmanship is excellent which is largely driven by their own high standards which they monitor closely and consistently. They are organised and communication is always great. A big thank you to the whole team and Specially Negedet being a joy to work with . Highly recommend him and his hard work time. Thank you
SP Builders
Rating: 4.8 out of 5
Extension Builder in New Malden
Welcome to SP Builders, a family-run builder with over 40 years' experience. Undertaking all aspects of building work, refurbishment, lofts, extensions, paving, guttering, carpentry and plastering etc. We aim to make the process from conception to completion as pleasurable and rewarding as possible. We know how important it is to trust a builder when employing them to work in your home. We endeavour to answer your questions and give you the information you need to make the right decisions.
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Latest review:
Extensions- 16 Sep 2025
Steve and his crew did an amazing job turning my fag-packet designs and downloaded images into a proper, wonderful sound proof garden building, concrete external & rockwool cavity He’s a an old-school builder who does things the right way. His approach and mentality are always “how are we going to do this” rather than “I can’t do this,” I picked Steve on price and previous work. He came in middle price wise and was fair, it’s safe to say it was the right choice. He was left to his own devices, worked through all sorts of weather, and although the job took a little longer than expected because of that, he stuck firmly to his original quote. Although steve didn't know at the time, the garden room was my test for both quality, work ethic and trust, and Steve passed with flying colours. On the back of this, I’ve now commissioned him to build me a two-storey extension. I think I’ll buy him his own coffee machine for that project though! ;-) Thank you, Steve
Ekd Construction Ltd
No reviews yet
Extension Builder in New Malden
We create and improve spaces through collaborative partnerships with our clients and meticulous, professional craftsmanship. We ensure every project reflects both your vision and our shared values. And we know the business process from start to finish. Works we carry out: Interior & exterior painting • Wallpaper hanging & removal • Woodwork, staining & sealing • Kitchens, cupboards & decking Commercial spaces • Colour consultation • Damage repair & mould treatment • Stud partitions • Joists • Sub-floors • Door frames • Staircase fitting • Engineered flooring • Doors • Skirting Architraves • Kitchen fitting • Bespoke cabinetry • Decking • Custom work • Windows • Flat roofs
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City Building and Roofing Ltd
Rating: 4.9 out of 5
Extension Builder in New Malden
City Building and Roofing Ltd provides professional roofing, refurbishment and building services across London and Surrey. Our services include roof repairs, new roofs, flat roofing, GRP roofing, roof refurbishment, guttering, fascias and soffits, chimney work, damp proofing, brickwork and full property refurbishment. We work with homeowners, landlords and commercial clients, delivering reliable workmanship, honest advice and free no obligation quotes.
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Latest review:
Damp Proofing- 26 Mar 2022
Good,timely and clean workers. Worked hard and efficiently with clear explanations. Very satisfied with the finish.
D A Lynch Building Services Ltd
Rating: 5 out of 5
Extension Builder in New Malden
Hi my name is Dwight. I'm here from D A Lynch Building Services Ltd. I am here to provide you with excellent building work and whatever else you have to do around your home. My company carries out work to the highest quality with professional workmanship.
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Latest review:
I was very pleased with this company so much so that they are starting a new job for me November 15. The building firms carried out a full loft conversion for me installing bathroom, brickwork, joinery, plastering, Roofing and installation of windows and double glazed doors. I have high standards and want everything to be completed in the same way, the workmen respected my home and always left if clean. My main contact was with the owner of the company Dwight Lynch, he was very flexible and Nothing was too much for him to do. He has an attitude which I like in a builder "customer not always right but must be happy" he provided me with ideas along the way and where things did not go to plan due to my own instructions he worked around the issue and provided suitable alternative options. I was very happy with the pricing of the job and feel that certainly I would recommend him and also I would use him again. He and his workmen were all trust worthy and I gave them keys to my house to carry-out work whilst I went on holiday. I had no concerns when I came back everything was as I left it.
Alex Hriban
Rating: 5 out of 5
Extension Builder in New Malden
I take all sort of jobs from fencing to kitchen fitting and all sort of carpentry jobs and plumbing jobs
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Latest review:
Carpentry- 23 Dec 2022
Alex came very punctually to do the job and laid down a wooden hallway which I am very pleased with.He also repaired my front doors and added a draught excluder. Alex was patient, polite and got on with the job in a very efficient and cheerful manner-I would hire him again for other jobs in the future.
Cheam building services ltd
No reviews yet
Extension Builder in New Malden
• Extensions • Loft Conversions • Garage conversions and home alterations • Refurbishments • New builds • Bathrooms and Kitchens • Driveways and patios • We help source Drawings • Full project management
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Jbt contractor limited
No reviews yet
Extension Builder in New Malden
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Standard Double Glazing
No reviews yet
Extension Builder in New Malden
Welcome to Standard double glazing profile we provide services like , Glass installation,Glass restoration& repair,Broken window,Door repair, Double Glazing Repairs,Emergency Repairs,Lock replacement,Patio Door,Triple Glazing, window Repair,composite Door, windows & Door, Lanter Roof , sky Roof, Aluminium windows & Door All work Under fully Guarantee we provide Guarantee Certificates To all customers
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AGK Carpentry & Construction
No reviews yet
Extension Builder in New Malden
The work we undertake are as follows: Extensions Loft conversions Carpentry Renovations Building work
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CJ Carpentry
Rating: 5 out of 5
Extension Builder in New Malden
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.
Home improvement
Rating: 3.4 out of 5
Extension Builder in New Malden
“Reliable handyman with 7+ years of experience in flooring, plastering, and general home repairs. I take pride in clean work, clear communication, and finishing jobs on time. Available for small to medium projects — no job too small!
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Latest review:
Handyman- 25 Jun 2026
Do not hire this individual whatever you do. He is highly unprofessional and condescending when you try to ask him any questions, he clearly doesn’t know what he is doing and just wings it. Always makes out the fault lies with wall or the part but never his lack of skill/competence. He fitted the bracket wrong way round and when I told him this he denied it until he was forced to face facts. The tv is tilting forward and he told me that’s how it supposed to be when the diagram says otherwise and it is supposed to rest flat on the wall. I now have to pay a competent person to come and fix his mistakes! I would give him 0 stars if I could! Avoid like the plague!!!
Kang construction ltd
Rating: 5 out of 5
Extension Builder in New Malden
We are a family run business who have been trading for the past 20 years. The business was started by our father and now we are continuing. We have been working with our father for the past 14 years. We specialise is loft conversions, building extensions, and renovations, all type of building work.
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Latest review:
Loft Conversion- 18 Mar 2022
Brilliant company, very friendly people, easy to communicate, punctual, high standard work, committed to the scheduled time, honest and competitive prices. I recommend them for friends and family.

4.2

Top rated Extension Builders

Our Extension Builders in New Malden, are rated 4.2 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 New Malden?

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 New Malden 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 New Malden who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in New Malden?

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

Find extension builders in New Malden with MyBuilder

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

Step 2: Compare different extension builders in New Malden

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

Step 3: Hire New Malden extension builders with confidence

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

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

What to ask a New Malden extension builder before hiring?

Before hiring an extension builder in New Malden or extension building company in New Malden, 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 New Malden?

An extension builder in New Malden 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 New Malden 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 New Malden?

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 New Malden 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 New Malden 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 New Malden

Can an extension builder in New Malden help with planning permission?

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

Many New Malden 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 New Malden help with materials and finishes?

Yes, most extension builders in New Malden 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.