Extension Builders in New Malden

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

Easily find verified New Malden Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in New Malden.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in New Malden

3073 Results

Sort by:

Eloah Israel security and construction Ltd
Rating: 5 out of 5
Extension Builder in New Malden
Hi, we are a company that prides itself on providing good work to our customers, making their dreams come true! we guarantee complete satisfaction and quality in carrying out our work, respecting the delivery times determined by our customers
Get in touch
Latest review:
Erick demonstrates remarkable thoroughness, reliability, and trustworthiness. His keen attention to detail is exceptional, and he leads a highly efficient team that promptly meets all demands and tasks. He successfully refurbished my entire house in Northampton, adhering to the projected timeline without any delays or setbacks. Throughout the project, he never dismissed any of my requests and fulfilled them all effortlessly. Erick is always easily accessible, promptly responding to calls and messages. I have enthusiastically recommended him to several of my friends, all of whom are immensely satisfied and grateful for his services. Furthermore, his pricing is fair and reasonable, leaving me extremely pleased with the quality of his work.
provilla limited
Rating: 4.9 out of 5
Extension Builder in New Malden
Our company provides a complete construction service to both public and private sector. We proud ourselves with our Customer focus approach understanding our Client's needs and being proactive involved in all matters of our projects large or small.
Get in touch
Latest review:
Bathroom Fitting- 14 Oct 2013
overall did a good job for the price i paid. was fast and courteous. they were the cheapest quote i got and i am happy with everything in the end.
KG BUILD
Rating: 5 out of 5
Extension Builder in New Malden
With your specifications and our expertise, we happily take on any building work and produce excellent results. Extensions, Loft conversions, kitchens, bathrooms, garden rooms/studios/outbuildings, roofing, flooring, carpentry and joinery etc
Get in touch
Latest review:
Carpentry- 13 Dec 2025
Kwame did a great job and was thoughtful, communicative and very skilled with the work he was carrying out on our joists. I would recommend KG build to anyone looking for a good price and a high standard of work.
Oleg Yembryk
Rating: 5 out of 5
Extension Builder in New Malden
I've been working on various domestic & commercial projects for two decades.
Get in touch
Latest review:
Oleg did an excellent job. Clear cost layout in quote. Was communicative through out the build so no hidden corners were cut. Any changes needed were clearly explained and any alteration easily accommodated. Very helpful with advice when needed. I would use him again and in fact would be my first choice.
Davis-Brady construction limited
Rating: 5 out of 5
Extension Builder in New Malden
At Davis-Brady, we are more than just a construction company; we are a family-driven team dedicated to excellence in every project we undertake. With decades of collective experience in the industry, our skilled professionals specialize in design, electrical, plumbing, tiling, kitchen fitting, decorating, and carpentry services. Our commitment to quality craftsmanship, attention to detail, and client satisfaction sets us apart. Whether it's renovating a home, building a new space, or tackling a commercial project, we bring expertise, reliability, and a personal touch to every job. Trust Davis-Brady to bring your vision to life, one project at a time.
Get in touch
Latest review:
Handyman- 11 Feb 2025
Brady & Cesar did an excellent job hanging/painting six internal doors. The door frames weren’t straight, which made the job more challenging, but they took the time to get everything just right. They were meticulous in their work, covering the floor to protect our home and ensuring everything was clean afterward. Both explained what they were doing throughout the process and provided a personable, professional service. Would highly recommend Davis-Brady Construction Limited
Renovations.Tm
Rating: 5 out of 5
Extension Builder in New Malden
We are an experienced and reliable company specializing mainly in extensions, basements, conversions, skylights. We can carry out renovations or building works to your dream home. As we say, Well Done Is Better Than Well Said, come and check us out now !!!
Get in touch
Latest review:
Tomasz and team did various jobs for me (wooden floor, skirting boards, acoustic wall and floor insulation, plastering, painting, electric work etc). Top finish and workmanship, extremely professional and reliable, friendly, helpful, considerate, punctual, honest, tidy worker.
Walter weir Ltd
Rating: 5 out of 5
Extension Builder in New Malden
Walter Weir Ltd - established as a design and build contractor for the highest specification projects in residential and commercial developments in London & The South East. Our team of skilled tradesman, project managers & architects cover all scope of works within construction, who are experienced professionals, making the dream a reality for every client. We believe in cementing lasting relationships with clients & this can only be achieved by maintaining a constantly high standard of work.
Get in touch
Latest review:
Groundwork & Foundations- 19 Feb 2020
Donald Weir was really professional and helpful. They got the work done and handled our queries with patience. We will be soliciting their services again very soon!
SIXTHART LTD
Rating: 5 out of 5
Extension Builder in New Malden
We are an Architectural and Interior Design Studio. We effective planning and technical drawing services. Our Services - Site Survey -All Drawings with Cad Software (Demolish/Proposed) - Draft Planning - Pre Advice Planning - New Build Design - Loft Conversion - Home Extensions - 3D Visulation -Kitchen &Bathroom design projects - Preparation and submission of planning applications - Hourly\Daily Based CAD Services - 3D Modelling (Internal & External Visualisation) -Member of TAG (Traditional Architecture Group) -Bachelor’s Architectural Design Practice -NAAB -TMMOB
Get in touch
Latest review:
Extensions- 16 Sep 2024
Erhan was excellent. He followed my project from start to finish and kept me updated throughout. Here to the next project!
Cocis Construction Group
Rating: 5 out of 5
Extension Builder in New Malden
Cocis Construction Group LTD is a family-run construction company with over 25 years of hands-on experience in the trades. We specialise in home renovations, extensions, bathroom and kitchen refurbishments, and property development across London. As a young, ambitious company, we combine traditional craftsmanship with fresh ideas and modern techniques to deliver projects efficiently and to the highest standards. Our team takes pride in attention to detail, clear communication, and building lasting relationships with homeowners, landlords, and property investors alike. At CCG, we don’t just build structures—we bring visions to life, turning ideas into beautifully finished spaces. Contact us today for a free quote and see how our expertise and dedication can make your next project a success.
Get in touch
Latest review:
Cocis Construction Group done the full interior painting of our 5 bedroom house and we are really happy with the result. The team was polite and worked very hard every day. They kept things clean and finished everything on time like they said they would. The paint finish looks great and the whole house feels fresh again. Would definitely recommend them if you need painting done.
LGC Builders Ltd
Rating: 5 out of 5
Extension Builder in New Malden
We are a family run Company and we are currently expanding our Company and have over 30 years experience in the building industry. We specialise in all aspects of the building industry and pride ourselves on our main trade as bricklayers. We guarantee a high standard of workmanship and get on well with all our clients.
Get in touch
Latest review:
Bricklaying- 15 Nov 2019
They did a fantastic job and were very knowledgeable and highly professional throughout. They got on with it even though the weather was terrible and kept the site tidy and organised. We are delighted with the end result - on time and to budget too! I have no hesitation in recommending them. Thank you!
Prestige Property Lettings & Management
No reviews yet
Extension Builder in New Malden
We are a property management company with over 20 years experience in the field. We carry out maintenance work for letting agents, insurance repair work, extensions and conversions and cover all trades. We work in and around the M25 area
Get in touch
Kledian Bardhoshi
No reviews yet
Extension Builder in New Malden
We do the great job.
Get in touch
Ifa construction ltd
Rating: 5 out of 5
Extension Builder in New Malden
House extension, lofts conversion, house refurbished, and new build
Get in touch
Latest review:
Restoration & Refurbishment- 2 Jul 2023
AJ was thorough, friendly and thought things through. I would recommend him.
4 You Residential Limited
Rating: 5 out of 5
Extension Builder in New Malden
We have over 18 years of experience in residential and commercial refurbishment. We are skilled team of managers, architects, builders and craftsmen, competitively priced and flexible to suit your needs. We specialise in building basements, extensions, loft conversions and carry out full house refurbishments as well as working on smaller projects like kitchens, bathrooms, joinery and fit-out. Our team is energetic, fully insured, certified and recommended by long list of happy clients.
Get in touch
Latest review:
Groundwork & Foundations- 18 Jul 2019
My wife and I have been truly impressed by Victor and Tom's quick turnaround and willingness to get the job done to an extremely high standard. Their men were friendly, efficient and tidy which is invaluable when taking on any new and daunting property project. As a result of their efficiency we are hoping to work with Victor and his team again in the coming months and would highly recommend them to anyone looking for a reliable and professional contractor.
Home Design & Build
Rating: 5 out of 5
Extension Builder in New Malden
Tooled with years of experience, we undertake design & reconfiguration of builds; adding value to your home or business. Working closely with you; we create a bespoke, quality finish within your budget & affordability. Delivering a high standard of skill & integrity of craftsmanship we are proud off
Get in touch
Latest review:
Kitchen Fitting- 24 Jun 2025
Lalli and her team were all very professional, communicative, and detail oriented helping us create a new kitchen and bathroom that we love, not to mention, on schedule! We would highly recommend Home Design and Build and hope to work with then again in the future.
tony thomas
No reviews yet
Extension Builder in New Malden
Construction project manager with 10+ years in the property development industry. I possess in-depth knowledge of residential housing projects with the ability to integrate my technical, legal and financial knowledge to manage projects from inception to completion.
Get in touch

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.

Quality screening

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.