Extension Builders in New Malden

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (21 reviews)

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Some of our top rated extension builders in New Malden

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Apex Plan & Build LTD
Rating: 5 out of 5
Extension Builder in New Malden
Apex Plan & Build is your trusted partner in turning vision into reality. Specializing in both domestic and commercial construction, we are dedicated to transforming houses into dream homes and businesses into efficient, modern spaces. With over 30 years of collective industry experience, our team ensures every project is completed to the highest standard, offering expertise in M&E works, including air source heat pumps and MVHR ventilation systems. We also bring cutting-edge innovation to your space with smart home automation solutions like Loxone and Control4, creating environments that are not only beautiful but also intelligent and energy-efficient. Apex Plan & Build is where your dream project is our top priority.
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Latest review:
Very professional and organised. My rear extension renovation was impeccable, thorough knowledge of building regulations with a variety of services to choose from really put me at ease. The venetian plaster feature wall has become the centrepiece of our home.
Michal Palucki
Rating: 5 out of 5
Extension Builder in New Malden
I am a carpenter from trade, with 15 years of experience. My services include: new window installation /replacement /repairs, Internal and external door installation /replacement /repairs, Lock installation/change, glazing, adjustments, secures
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Latest review:
Windows & Doors (uPVC & Metal)- 20 Aug 2019
Great quality work and super accommodating! Highly recommend.
Safeway Build Ltd
Rating: 5 out of 5
Extension Builder in New Malden
At Safeway Build Ltd, we pride ourselves on delivering exceptional craftsmanship and reliable service in every project we undertake. Led by Florin, a highly trained professional with over 20 years of experience in the construction industry and a proud member of the Federation of Master Builders (FMB) since 2014, our company is built on trust, quality, and attention to detail. Working alongside trusted electricians and plumbers, we offer a complete service that ensures every aspect of your project is handled with care and expertise. Much of our success has come from referrals and repeat clients, a testament to the satisfaction and confidence our customers have in our work. At Safeway Build Ltd, we don’t just build — we build lasting relationships, turning your vision into reality with professionalism, transparency, and dedication. Whether you are looking for loft conversions, extensions or a refurb, all our services are carried out carefully, efficiently and to an exceptionally high standard of quality. We are happy to undertake any domestic work. At Safeway Build Ltd, no job is too big or too small.
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Latest review:
Kitchen Fitting- 10 Feb 2026
Florin and team were a joy to work with. Very communicative and worked to a great timeframe. Lots of little extra jobs were completed at no extra charge. Cost for job was reasonable and the tiling was immaculate - would definitely use Florin again. Would highly recommend!
RA Designs and Build Ltd
Rating: 5 out of 5
Extension Builder in New Malden
We are a dynamic construction firm specialising in innovative design and high-quality building solutions for both residential and commercial projects. With a commitment to excellence and attention to detail, our team of experienced architects, engineers, and skilled tradespeople collaborates closely with clients to bring their visions to life. We prioritise sustainable practices and utilise cutting-edge technology to enhance efficiency and ensure the durability of our structures. From initial design concepts to final construction, we are dedicated to delivering projects that not only meet but exceed client expectations, creating lasting value and aesthetic appeal. Our customers consistently recommend us for our commitment to quality, attention to detail, and exceptional customer service. They appreciate our ability to turn their visions into reality while staying on schedule and within budget. Positive testimonials highlight our professionalism, seamless communication, and the collaborative approach we take throughout each project. Clients feel confident entrusting us with their building needs, knowing that we prioritise their satisfaction and work tirelessly to ensure memorable and successful outcomes.
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Latest review:
Excellent quality of work which has not caused any problems for many years. Efficient work style whilst keeping up a high standard of work.
S&R Consultancy
Rating: 1 out of 5
Extension Builder in New Malden
We are a dynamic company who tailor our service for any business or homeowner needing work to be completed. We work on new builds, refurbishments, and extension projects etc. Our in-house team bring a vast spectrum of knowledge and experience to your projects in all areas, thus offering fresh perspective solutions. From maintenance and small-scale DIY to residential projects and commercial builds, we have what it takes to make your vision come true.
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Latest review:
Kitchen Fitting- 24 Mar 2022
Keep away from this cowboy. the owner is not a qualify gas safety engineer and yet responded to my post about gas safety certificate and gave me hand written gas safety certificate after checking equipment's in 10 minutes , not only that he fixed leaking sink and he took 2 minutes to fix the leak and within a week the sink is leaking again. total cowboy. I naively paid him on the same day for both the jobs.
IDEAL Carpenters LTD
Rating: 5 out of 5
Extension Builder in New Malden
Hello I am a skilled carpenter, with over 23 years experience working in and around London, I can undertake most all jobs concerning building works around the Home but also have a team of reliable sub trades including “Gas Safe engineers” and qualified electricians, If you need any work done, by some one you can trust and rely on then please don’t hesitate to short list me, for your next project, Regards Agron
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Latest review:
Conversions - General- 28 Jun 2026
We recently had our detached single garage converted into a fully usable room by Agron and his team, and we couldn't be happier with the result. The project involved replacing the garage door with matching brickwork, raising the roof, installing new windows and a door, insulating the garage, plaster boarding and skimming throughout, and rendering and painting the exterior. The work was completed to an exceptionally high standard. Agron and his team were fantastic from start to finish. They were incredibly friendly, professional and hardworking, completing the project quickly without ever compromising on quality. Communication was excellent throughout, they kept us updated on progress and always made sure we were happy with how the project was proceeding. They were also very accommodating and happy to adapt to any requests or changes we made along the way, making the whole process stress free. The attention to detail and pride they took in their work really shows in the finished result.
DDL MAINTENANCE & ESTIMATES LTD
Rating: 4.9 out of 5
Extension Builder in New Malden
Several project available on request . Reference available on request
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Latest review:
Groundwork & Foundations- 14 Nov 2017
Positive experience. Thank you
h building and landscaping ltd
Rating: 4.9 out of 5
Extension Builder in New Malden
H Building & Landscaping has 20 years experience in all aspects of building. From Extensions, Refurbishments, Basements, All Garden landscaping, Patios,Driveways,Garden walls,Fencing,Turfing, kitchen & bathroom refits & much more. We pride ourselves in attention to detail & customer satisfaction. We are trustworthy & reliable with a great reputation! It would be our pleasure to assist you in all works needed, we will not be beaten on quality or price. H Building & Landscaping Ltd
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Latest review:
Extensions- 18 Nov 2020
Unfortunately, Stuart Helm did not even start the job let alone complete it! Each time Stuart Helm was supposed to start work on the porch, he contacted me with an excuse explaining why he couldn’t start the work. This occurred over several weeks and eventually, we mutually agreed he would not be doing the work and I would repost the job. Very disappointing and lots of time wasted.
We Fix Your House Ltd
Rating: 5 out of 5
Extension Builder in New Malden
We Fix Your House is a family-run, small team of experienced industry specialists with many happy clients in and around London. We take pride in our work and ensure that our customers are always happy. So whether you're are looking for a little DIY help, or a complete renovation of your property, we're happy to help. You'll be pleasantly surprised by our competitive prices too, and YES, we can work around your budget.
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Latest review:
Plastering- 28 Apr 2019
Great job, very professional
tolworth construction Surrey ltd
No reviews yet
Extension Builder in New Malden
Welcome to tolworth construction Surrey we have over 20 years’ experience in the construction industry, we provide high-quality building and renovation services to domestic clients. We pride ourselves on excellent workmanship, clear communication, and completing projects on time and within budget. We undertake everything from small refurbishments to full extensions and loft conversions, offering a reliable, professional service from start to finish. Customer satisfaction is at the heart of what we do, and much of our work comes from repeat customers and recommendations.
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Nico Spurrier
Rating: 5 out of 5
Extension Builder in New Malden
GreenBuild began with owner Nico Spurrier making a strong commitment to offer excellent service, the highest quality in design and building work and great value for customers across the Sussex area and beyond. This approach is still very much at the heart of the business, earning GreenBuild a reputation as dedicated, professional, trusted builders providing superior, cost effective and efficient project management. We pride ourselves on being a building company the works only to the highest standard, delivering exceptional results, on time and within budget. As we look back on the challenges posed by the COVID-19 pandemic, we are proud to say that we have emerged stronger and more resilient. Our dedication to health and safety ensured that we could continue serving our clients while protecting the well-being of our team. Now, more than ever, we are committed to delivering excellence and look forward to many years of satisfied customers ahead. Based in Horsham, West Sussex, we are local builders with a wealth of experience working on projects throughout the region. From renovations and extensions through to full end-to-end design and build projects, we have the expertise and understanding to support our clients with everything from planning through to completion.
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Latest review:
Extensions- 5 Jul 2018
Nico and the Greenbuild team are polite, professional, clean and tidy, hard and fast working and were a pleasure to work with. Having completed several renovation projects and new builds, I can safely say that this team was the best by a long shot. Highly recommended. I hope they are not to busy to start my next project!
Radus Carpentry
Rating: 4.9 out of 5
Extension Builder in New Malden
Carpentry services We have a large skills range and provide a multitude of carpentry and joinery related Fire Door Installation (Certificate) Flooring Installations Floorboards & Joists Doors - Internal & External Door Locks Bathrooms Kitchens Integrated Appliance Fitting Boarding Up & Securing Burglary Damage Ceilings Cupboards Fitted Furniture Plasterboard Property Refurbishment Radiator Cabinets Shelving Wardrobes Window & Frame Repairs Window Installation Window Locks Worktops
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Latest review:
Carpentry- 7 Sep 2026
Went above and beyond hanging a difficult door. Great work, thank you!!
Kansal Consultancy Limited
No reviews yet
Extension Builder in New Malden
We provide Structural and architectural services. We provide CAD, planning drawings, construction drawings, drafting, floor plans, and surveying drawings services.
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I-MPV Construction LTD
Rating: 5 out of 5
Extension Builder in New Malden
My name is Cosmin, I am an all-round general builder but specialising as a NVQ qualified carpenter and joiner. No job is too small, and I am also happy to complete the smaller DIY/Handyman roles.
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Latest review:
Carpentry- 7 Mar 2021
Cosmin fitted new internal doors for us, in an old porperty with non-conventional sizes. He did a great job, and kept us informed throughout and advised on the best solution, for the best look. He is friendly and clean & tidy. I would recomend.
AK Construction (kasko group) ltd
Rating: 4.9 out of 5
Extension Builder in New Malden
As an experienced renovation company with many properties on our portfolio we are happy to estimate and carry on any kind of work on this project. We are a full time builders team working constantly on refurbishments , extensions, and new build residential properties. A detailed breakdown in costs will also let you know how much your project will cost with out any hidden charges.General Building works ( full refurbishments , partly referb , plastering , painting etc)
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Latest review:
Extensions- 21 Jul 2025
I recently hired AK construction to build an extension on my home, and I am beyond impressed with their work ethic, flexibility, and outstanding customer service. The extension was built to the highest standard—flawless craftsmanship, attention to detail, and seamless integration with my existing home. The team was punctual, tidy, and respectful throughout the project. What really stood out was their willingness to help, even beyond the contracted work. When I had some DIY tasks, they offered advice, lent me tools, and even stepped in to assist where they could—despite not being obligated to do so. Their kindness and professionalism didn’t waver, even when I declined additional quotes for other work. They stuck to the timeline and budget with no surprises. Communication was excellent, and they treated my home with care as if it were their own. I can’t recommend Ali and AK Construction enough—they’re trustworthy, skilled, and genuinely care about their clients.
FBS LONDON LTD
No reviews yet
Extension Builder in New Malden
FBS LONDON LTD are fully qualified, insured and certified team of builders. We have a wealth of experience spanning over 20 years in the building/construction industry. During this time, we have built a reputation based on quality of work, reliability and trustworthiness. Jobs undertaken and completed to the highest standards include: loft and garage conversions extensions hard scaping (paving/patios) renovations (kitchens & bathrooms) a lot of general home improvements garden works carpentry joinery and more We pride ourselves on completing jobs on time and in budget. Many customers come back to us time and time again, we can provide customer references as well as arrange viewings of previous work we have done. Contact us today for a FREE quote or advice and start your journey to a perfect home!
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4.2

Top rated Extension Builders

Our Extension Builders in New Malden, are rated 4.2 out of 5 based on 21 reviews from customers like you.

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Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

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.