Extension Builders in Carshalton

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4 (22 reviews)

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Some of our top rated extension builders in Carshalton

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rawstraw realty ltd
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Extension Builder in Carshalton
Hello We are a team of professional build workers with expertise in Electrics, plumbing, ground works, landscaping and much more
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azrenovation
Rating: 4.9 out of 5
Extension Builder in Carshalton
We specialise in bathroom design, renovation, tiling, carpentry, and custom woodworking — delivering high-quality results across every aspect of your project. From full bathroom transformations to bespoke fitted furniture and precision tiling, we handle every detail with care and craftsmanship. Whether you’re refreshing a single room or undertaking a complete renovation, our team brings the skills and experience to get it done properly — on time and to a high standard. We take pride in clear communication, tidy workmanship, and leaving every job finished exactly as agreed. No cutting corners, no subcontractors — just reliable, skilled tradespeople you can trust in your home.
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Latest review:
Extensions- 30 Dec 2020
I have only got positive things to say about this project - we are extremely happy with both the end result and the overall process. This was a big project for us, involving an extension of our kitchen and conversion of our garage into an office, to transform the entire ground floor of our property. It involved taking down two external walls and three internal walls, requiring the fitting of 3 steel beams. We had underfloor heating installed throughout and a bi-fold door extending across the whole back of our property. Zurab’s team, AZ Renovation, did everything – laying foundations, building new walls, electrical wiring, plumbing, plastering, tiling, painting, kitchen fitting, the whole works. Zurab, his main builder Mikheil and his team did an exceptional job and it was a pleasure working with them. They were friendly and helpful right throughout the project, listening to our ideas and concerns and helping us make the right decisions. Their attention to detail was excellent and they did all of their work to a very high standard. We are so happy with our new kitchen/ living area and it is an amazing space for our family. We would have no hesitation in recommending Zurab and his team for large projects like house extensions (or anything else for that matter). In fact, we have booked them in to come back next year to help us remodel our garden and outdoor area!
Tim's Painting
Rating: 4.9 out of 5
Extension Builder in Carshalton
Hi! My name is Tim.I have been working in the building trade for a very long time which has helped me a lot to gain lots of experience in different trades. We are based in Sutton but work allover the place in Surrey area. Quality of our job has helped our company to expand our business.
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Latest review:
Painting & Decorating- 18 Jun 2026
Tim is a superstar. Did an excellent job with painting and decorating and good communication throughout. Flexibility with the job timing and scope. Will use again and highly recommended.
Joiner Xpert Ltd
Rating: 4.8 out of 5
Extension Builder in Carshalton
Hi. Joiner Xpres is here to offer you a professional, efficient and quality standard of work , I am a fully qualified carpenter joiner with 23 years experience in the trade I can undertake all carpentry jobs big or small. a wide range of carpentry & joinery, Flooring Fitting, Kitchen Fitting. Doors, lock, Skirting & Architrave , Built-in wardrobes. Complete renovation of bathrooms. Own workshop. Fully professional tools. References and a lot of photos from the work done.
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Latest review:
Kitchen Fitting- 26 May 2026
Really pleased with Wojtek's work. He's reliable, friendly, and communicated well throughout the whole process. His work is precise and high quality, and nothing was too much trouble for him. Glad I found him on MyBuilder and happily recommend him.
moonlight builders ltd
Rating: 5 out of 5
Extension Builder in Carshalton
My name is Josh and I build from the ground through to the roof. All domestic and commercial builds covered with guarantee. Our service is second to none we value and take pride in what we do to complete all details finely. We have been building and refurbing now for many years, timekeeping is key. Friendly and most importantly trustworthy. We are highly passionate in what we do, so if your looking for a difference, a job which brings a smile and a warm heart with a professional finish.
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Latest review:
Bathroom Fitting- 12 Jan 2023
Very nice and kindly man
AT Line Construction
Rating: 5 out of 5
Extension Builder in Carshalton
We are a limited company with many years experinece at construction and usually undertake medium to large size projects like refurbishment, bathroom restoration, loft conversation, extensions and general refurbishment. With high end quality.
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Latest review:
Extensions- 17 Nov 2022
AT Line Construction built our extension and worked on the remodel of the inside of our flat. We are extremely happy with the results. Adison and his team are very professional and friendly. They were able to deal with any changes and problems that came up quickly and sensitively. Part of the build was to renovate a small disused swimming pool - this was a tricky job, and they were able to help us creat an amazing pool. We would definitely recommend them.
WBS LONDON
Rating: 4.9 out of 5
Extension Builder in Carshalton
We offer a wide range of services so that we can take care of your needs and requirements. General Building work Refurbishment Extension Loft Conversion Demolition Ground work Partitions and Ceiling Electric work Plumbing work Plastering Painting/Decorating Tilling Flooring Rendering Driveway/Patio Fencing
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Latest review:
Painting & Decorating- 29 May 2026
Quick wallpapering job done to a high standard
Prime Builders Contractor Ltd
Rating: 5 out of 5
Extension Builder in Carshalton
Specialists in home renovations, refurbishment and redesign, Our role is to deliver the renovation of your dreams, within your budget.
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Latest review:
Demolition- 19 Sep 2018
Lukas and his team did an excellent job. They arrived on time, were polite and friendly and worked incredibly hard. Would recommend.
Arthur's Building Service Ltd
Rating: 5 out of 5
Extension Builder in Carshalton
We are Arthur's Building Service LTD, based in Carshalton, Surrey. We provide a prompt, professional, experienced and friendly service covering loft & extensions, kitchens, bathrooms, & other building & decorating services for residential and commercial premises in South London and Surrey. We provide free quotes at times convenient for you. We truly value all our customers & are always available to discuss any aspect of your project and to help in any way we can.
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Latest review:
Painting & Decorating- 24 Jan 2019
Valentin did a very good job at my place and he finished the tiling work as agreed in 2 days. I am happy with his work and would highly recommend him. Thanks, Subhash
AG south construction
Rating: 5 out of 5
Extension Builder in Carshalton
I'm qualified bricklayer with 20 year's experience, I'm doing refurbishements and new houses work from start to finishing off in very high standard.
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Latest review:
Extensions- 13 May 2026
Agim completed a ground floor extension for me in 2025 and I would not hesitate to recommend him for similar work. The quality of the work was excellent and the team worked tirelessly for months to ensure it was completed on time and for a reasonable price. Agim was able to adapt quickly when any unforeseen problems occurred, always clearly communicating possible solutions to help keep the project moving. Having people in your home can be difficult but Agim is very respectful and considerate, making sure to put our needs first. The results are fantastic and Agim continues to help snag any minor issues that come up. I couldn’t be happier with how things went, testament to his professionalism. Thanks Agim for all your help on this project.
Self employed
Rating: 5 out of 5
Extension Builder in Carshalton
With 22 years experience in bathroom fitting, I deliver high-quality work efficiently and prioritize customer satisfaction. My dedication ensures projects are completed promptly, exceeding client expectations. I excel at problem-solving and maintain clear communication throughout each project. My expertise guarantees functional and aesthetically pleasing bathrooms. Choose me for reliable, high-quality bathroom renovations.
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Latest review:
Bathroom Fitting- 24 Jan 2026
Thomas did a nice job within a short time. He brought the material and the workmanship was good. He charged reasonable rates. We highly recommend Thomas.
ASAR PLUMBING AND BUILDING
Rating: 5 out of 5
Extension Builder in Carshalton
I am a qualified plumbing heating engineer and General builder, i have learned my trade working for a plumbing / building company for 15 years. i have also been Nescot College for four years where i gained my qualification. I am hard working person, honest, trustworthy and take pride of my job. Customer satisfaction is my top priority.
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Latest review:
Extensions- 17 Mar 2024
Agim and his team were great - communicated what they would do at each stage, the timing, materials needed etc., no major surprises. The building is quite old and wonky in places so they had to work with that and the finished result looks great. Very happy and have would recommend Agim again!
Aitchison Development Construction Limited
Rating: 4.8 out of 5
Extension Builder in Carshalton
We have been in the property development and building work for more than 20 years. We specialise in loft conversions, extensions, new builds, bathrooms, kitchens, steel works, driveways, decking etc. I have uploaded images of my recent works.
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Latest review:
Extensions- 20 Nov 2025
I recently had a rear extension done on my 1930s house, along with a new kitchen, upstairs bathroom, and downstairs shower room, and I honestly couldn’t be happier with the whole experience. Omer came out to view the property just before completion and kept in touch so he could start work the moment we got the keys, which was brilliant for us! From day one, his communication was spot on. He explained everything clearly, set out exactly what was included in the quote, and made sure we understood the plan so there were no grey areas or unexpected surprises which is everyone’s worst nightmare during a reno!! The quality and speed of the work were exactly what we hoped for. The team often worked weekends and late evenings to keep things moving. Omer was always at the end of the phone if we needed anything, and he’s genuinely a lovely person who made the process far less stressful with his humour. I’ll definitely be using him again.
Rc builders
Rating: 5 out of 5
Extension Builder in Carshalton
Family run company with 20+ years experience using time served and fully qualified tradesmen Finishing to a high standard regardless of your budget. All work fully guaranteed
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Latest review:
Restoration & Refurbishment- 30 Apr 2026
Job was completed quickly and to a great standard. Reasonably priced and we would definatley use them ahain
DL CONSTRUCTION LONDON ltd
Rating: 5 out of 5
Extension Builder in Carshalton
Dl construction London is a small family business based in London, that prides itself on quality work for the right price. We offer bathroom and kitchen renovations, extensions and loft conventions , home alternations and refurbishment, plumbing and heating and small building jobs . Our clients needs are our top priority. - certified installer - Dbs checks up to date - asbestos certified
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Latest review:
Bathroom Fitting- 2 May 2024
I have employed DL Construction to install a new kitchen and bathroom. They are still working in my house but so far their attitude towards their task and helpfulness have been exceptional. I can not comment about the final product yet but I am sure everything would be finished to a high standard. Nothing seems to be a problem for Javi. He always says 'yes please' and I think that is his middle name. I couldn't have asked for better. Well done (so far) Javi and everyone in DL Construction.
HJ Contractors Limited
Rating: 4.7 out of 5
Extension Builder in Carshalton
HJ is a small friendly local company. We take on all sizes of jobs from as little as hanging curtain poles to as big as extensions. HJ is made up of a team of people with the combined experience of 35+ years in the building trade. Our company goals are to supply high quality work at affordable prices and excellent customer service.
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Latest review:
Handyman- 9 Sep 2018
Finished the job quickly. Will hire again.
Builder
Rating: 5 out of 5
Extension Builder in Carshalton
Hi we are specialize in all type of plastering and decorating thanks
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Latest review:
Plastering- 15 Jun 2026
Very good quality work. Hard worker. Good price. Thank you Jimmy and Ruben.

Top rated Extension Builders

Our Extension Builders in Carshalton, are rated 4 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 Carshalton?

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 Carshalton 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 Carshalton who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Carshalton?

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

Find extension builders in Carshalton with MyBuilder

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

Step 2: Compare different extension builders in Carshalton

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

Step 3: Hire Carshalton extension builders with confidence

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

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

What to ask a Carshalton extension builder before hiring?

Before hiring an extension builder in Carshalton or extension building company in Carshalton, 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 Carshalton?

An extension builder in Carshalton 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 Carshalton 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 Carshalton?

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 Carshalton 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 Carshalton 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 Carshalton

Can an extension builder in Carshalton help with planning permission?

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

Many Carshalton 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 Carshalton help with materials and finishes?

Yes, most extension builders in Carshalton 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.