Extension Builders in New Malden

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 New Malden

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Greenfield Building Solutions Limited
Rating: 5 out of 5
Extension Builder in New Malden
Greenfield Building Solutions is a versatile building contractor offering a comprehensive range of services across residential construction and renovation. From full refurbishments and loft conversions to bespoke house extensions, they handle every aspect of the building process with precision and care. Known for their commitment to quality craftsmanship and client satisfaction, Greenfield Building Solutions works closely with homeowners to transform spaces—whether it’s modernising interiors, expanding living areas, or reimagining unused lofts into functional rooms. Their team brings expertise, reliability, and a tailored approach to each project, making them a trusted choice for turning property dreams into reality.
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Latest review:
Extensions- 6 May 2026
Mark & Max built a custom summer house/garden office for us to our exact specification and within budget. . The work included clearing & preparing the area, erecting and insulating the space, cladding the exterior walls and sealing the roof, installing uPVC doors, plus electrical and data connectivity. . It was all done without fuss or hassle, and at a high standard. Mark & Max were a pleasure to communicate and work with, would 100% hire them again. . Further references & a viewing of their finished work available by appointment
lnk.brickwork
Rating: 5 out of 5
Extension Builder in New Malden
LNK brickwork professional team has over ten years of experience in London's construction industry, working with commercial and residential customers locally. Property extension, build a garden wall, need a paving job done or plan a new build, you can count on LNK BRICKWORK. Our commercial projects include new construction, repairs and restorations. We can also plan, manage, and build multi-phase jobs.
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Latest review:
Bricklaying- 10 May 2019
Excellent work recently carried out to a very high standard. A very polite and professional team who delivered everything and more above my expectations. Would definitely recommend this company and use again.
londonprobuild
Rating: 5 out of 5
Extension Builder in New Malden
Londonprobuild is based in London/Surrey who specialist in Bathrooms, Kitchens and Renovations. We offer customers a comprehensive services helping them to optimize their space. We take the time to ascertain the needs of each client offering the following services: Home Improvements General Building Works & Repairs Plumbing & Heating Systems Painting & Decorating Electrical Plastering Tiling & Flooring Carpentry For a no-obligation quote please get in touch.
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Latest review:
Bathroom Fitting- 25 Nov 2020
Alex provided a great service. He came round on time to view the job, gave a detailed and competitive quote and built the bathroom exactly to spec. He was keen to ensure I was happy with all aspects of the installation with regard to both materials and workmanship and even carried out some small additional activities not included in the original quote. He was polite, hard working and very experienced. He also cleaned up the house at the end of each day. I am really pleased with my bathroom and would thoroughly recommend him to anyone.
Plastering and Rendering
Rating: 5 out of 5
Extension Builder in New Malden
plasterering and Renderering specialist, K-rend - silicone render - insulations, EWI system, Micro cement. drylining, and full refurbishment. Over 20 years experience.
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Latest review:
Plastering- 7 Aug 2023
Festim was efficient, punctual and did a very nice job rendering my wall. Highly recommended.
Mayfair Build Ltd
Rating: 5 out of 5
Extension Builder in New Malden
With over 30 years experience within the building, Landscape and civil engineering industry. Mayfair Build Ltd has a wealth of knowledge to turn your project from a dream to reality. We cover the Surrey Area. And feel free to google for more reviews.
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Latest review:
Groundwork & Foundations- 4 Oct 2022
Dean came the following day that the job was placed to see the site and estimate - the quote came soon after. Work was done on time and kept mess to a minimum. I would use Mayfair Build again.
Surrey Property Maintenance & Construction
Rating: 5 out of 5
Extension Builder in New Malden
We are a family run local building company i personally have been in the building trade for over 28 years .we have a full list of completed extentions and loft conversions with satisfied clients and references avalible . We can deal with local council approval and building regulations . We have full public liability insurance
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Latest review:
Loft Conversion- 31 Dec 2019
He came first to look . Send us the quotation and then came to discuss the job. Seemed very professional in his work. After talking to him we were confident enough to hire him with our loft conversion and refurbishment of our Bungalow . Hoping that every thing is going well in the time frame and also the good quality job . So far good .looking forward to see my home beautiful to live in near future
THANDI & KARTAR DEVELOPMENTS LTD
Rating: 5 out of 5
Extension Builder in New Malden
A structured and well mannered approach is applied to all our construction works we project manage. Our work ranges from extensions to full property refurbs, however we also provide additional services like helping you buy the right property or even a buy to let!
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Latest review:
Extensions- 8 May 2024
T&K immediately understood what we wanted to achieve and made beneficial changes to the architects plans. T&K were patient when we changed our minds. The quality of work including subcontractors was excellent. Snagging was fixed with alacrity. The finished project looks stunning.
Viranna Professional Building and Cleaning Service Ltd
Rating: 4.4 out of 5
Extension Builder in New Malden
Viranna Brickwork Contractors are actively looking to take on more work and would like to be in your tender list. We are based in Surrey, South Croydon, but travel and work all over the South East. We have over 10 years’ experience in the Building industry and taking pride in the job. Looking forward to work with you on your next project. Viranna Professional Building and Cleaning Service LTD
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Latest review:
Bricklaying- 26 May 2020
Very professional and reliable. Quality of work is very high standard and will definitely use their services again. Come highly recommended.
Brick House Builders LTD
Rating: 5 out of 5
Extension Builder in New Malden
Hi, I’m Jatinder. I’ve been working in the building trade for 15 years now. I’m qualified as an electrician and a gas safe register. I specialise in building new houses, loft conversions, extensions, and house renovations.
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Latest review:
They were very professional and quote provided was very efficient and cost effective. The job was finished on time. High recommend.
JUST London Carpentry
Rating: 5 out of 5
Extension Builder in New Malden
I am a fully trained Danish carpenter, qualified through a 4-year apprenticeship recognised across Europe for its high professional standard. This training exceeds UK NVQ Level 3 Advanced Craft, and I also hold a Gold CSCS Card. With nearly 15 years of experience, I bring Scandinavian precision, clean workmanship, and reliable communication to every project. My work is carried out with accuracy, pride, and an uncompromising eye for detail - whether the job is large or small. What you can expect from me: High-quality, long-lasting craftsmanship Clean, tidy, organised working methods Straightforward communication and honesty No shortcuts, no mess, no hidden surprises A finish that meets Scandinavian standards I treat every project with the same care I would expect in my own home. If you want genuine craftsmanship, reliability, and a premium finish — I’ll be happy to help.
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Latest review:
Carpentry- 25 Jun 2026
I cannot recommend Liiam highly enough. Before I had even hired him, he went out of his way to sketch up two different design options so I could visualise the finished result. I purchased the balustrade kit through a third-party supplier, and Liiam even took the time to recover my basket and help ensure I had everything needed. He arrived exactly when he said he would, worked incredibly tidily throughout, and his attention to detail was outstanding. Most importantly, the finished balustrade looks absolutely fantastic and has transformed the space. Liiam clearly takes great pride in his work, and it shows in the quality of the finished job. Professional, reliable, meticulous, and a pleasure to deal with from start to finish. I would wholeheartedly recommend him to anyone looking for a skilled and trustworthy installer.
James Murdoch
Rating: 5 out of 5
Extension Builder in New Malden
Construction company with 27 years experience in the industry between us and a team of other qualified tradespeople necessary to undertake projects.We are new to this site so please ask us to provide you with reference from previous clients. We have experience in timber frame homes, apartment blocks, extensions, renovations and commercial works.We take great pride in our work and make sure every job is completed to the highest of standards on time and on budget. Our aim is your satisfaction.
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Latest review:
Carpentry- 31 May 2017
Was really impressed with these guys. Helped me order the correct garden door and then went to pick up extra bits when the order didn't turn up correctly, for no extra cost and couldn't have been nicer about it, even though it was a pain for them. Really cheerful and helpful - nothing was too much trouble. Would use them again, for sure.
Pmc
Rating: 5 out of 5
Extension Builder in New Malden
hi I am a carpenter with 30 years experience doing all aspect of works from extensions to loft conversions and total refurbs all works done to high end standards my aim is to work with you the customer from start to Finnish to achieve your dream
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Latest review:
Kitchen Fitting- 14 May 2022
Paul is reliable and knows his trade. He can problem solve and is easy to talk to. He fitted our kitchen and flooring , including strip out and disposing of the old one. All done to a high standard, on time and as per quote. Would definitely use again.
BLE CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in New Malden
BLE stands for Best Lofts & Extensions.We are a professional building company based in South West london. BLE are specialist in loft conversion,home extensions,garage conversion,as well new builds.We also conduct any projects such plastering,brickwork and all interior and exterior works.
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Latest review:
Extensions- 16 Oct 2023
Mariusz & his team are amazing, from start to finish they have been fantastic & we cannot recommend them enough. We met with a couple of builders for quotes & felt like our project would be in good hands with Mariusz, we instantly liked him & had a good feeling. He was happy to talk through everything with us, answer our questions & nothing was a concern or a problem, this continued throughout our whole project. Communication was faultless throughout, which in our past experience is unheard of & Mariusz was on site multiple times a week. The team were polite, hard working, tidy & professional. Andrew & Pavel were the main guys on our build & they were amazing. They arrived the same time every morning & worked so hard 6 days a week. We cannot believe how quickly & professionally they carried out each stage of the build, which ensured all timelines were met. There was no cutting corners, the quality of work was excellent, with many of our neighbours coming over to comment on their craftmanship, especially the brick work. Our local council building inspector assigned to our project was satisfied & complimentary of the build throughout, no concerns were raised. Doing any size home renovation project & finding someone you can trust & rely on can be daunting. However, Mariusz & his guys really are who you hope to work with. If you are looking for a team then look no further, you will be in safe hands. It's been an amazing journey & a pleasure to work with Mariusz. Thank you
london construction company
Rating: 5 out of 5
Extension Builder in New Malden
Established in 1994 , Family run business . Friendly reliable service , Extensions / lofts and landscape specialist
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Latest review:
Extensions- 15 Feb 2026
Incredibly professional, super fast response, great quality of work, sound and thorough advice, available and patient at all times - Terry did a great job putting together my garden office installation at short notice despite inclement weather. I can vouch sincerely for his work and will definitely recommend him
shalom property development ltd
Rating: 5 out of 5
Extension Builder in New Malden
Shalom Property Development ltd is a small construction company based in the Croydon area. We specialize in property refurbishment, house extensions, loft conversions, garage conversions, etc. We also undertake projects like plastering, painting/decorating, electricity, plumbing, tiling, flooring(laminate, wood, bamboo), bricklaying.
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Latest review:
Plastering- 6 May 2025
Amazing guys. Hardworking, tidy, professional. They worked in our house for 3 months and we were super happy with the work and everything. We invited them to do more work later on. 100% probably the most sincere and trustworthy builders we met. Only them. No one else from now on.
E.V Roofing
Rating: 5 out of 5
Extension Builder in New Malden
I am running my own business now. I am a carpenter first and second fix. I have a lot of experience 7 years (2 years in Norway+5 years in UK). I am dedicated to providing top quality house renovations, loft conversion , roofing (tiling,fibreglass),house extension ,flooring, doors, windows, kitchen , wooden floors .
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Latest review:
In the round I had a very good experience when working with Ermal on our 6 month project, Reliability, quality and speed all exceeded expectations. I would recommend Ermal and his team, especially for any carpentry.

4.3

Top rated Extension Builders

Our Extension Builders in New Malden, 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 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.