Extension Builders in Chelsea

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (18 reviews)

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Some of our top rated extension builders in Chelsea

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Spoonerbrothers London
Rating: 5 out of 5
Extension Builder in Chelsea
Spooner Brothers London has 20 years of building experience We have a good reputation for customer service, many of our leads are recommendation, with competitive prices & a high standard of workmanship. We specialise in orangeries, conservatories, porches, Skypods, windows, doors & bi-folds ! We are Certass fenestration registered, so all work comes with a building compliant certificate and an insurance backed guarantee See our brochures on the Spooner brothers london website
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Latest review:
Windows & Doors (uPVC & Metal)- 29 Jan 2024
John did a fantastic job of replacing a large sash window in our kitchen. He was easy to work with, and was very clean and tidy with the job. On top of that the price was very fair, particularly for the calibre of work completed. Would recommend!!
Dylan Moon
No reviews yet
Extension Builder in Chelsea
Hi my name is Dylan Moon, I am a carpenter from NZ. I have been a carpenter for 10 years. I have knowledge in 1st and 2nd fix and am always eager to learn new skills. I am polite with a good work ethic and great people skills. I take pride in my work and wouldn’t settle for anything that I’d like in my own property.
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TCTSERV LTD
Rating: 5 out of 5
Extension Builder in Chelsea
Hard working, honest and reliable builder team, with over 18 years experience in property refurbishment. Proud of our work, we always try to exceed customer expectations. We deliver top quality services that our customers can rely on - at affordable prices. Free estimates. CALL Tache TODAY!
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Latest review:
Carpentry- 12 Nov 2017
Tony is a very professional tradesman. He was punctual and completed the job satisfactory within the recommended time line. I will be using Tony again and recommend him to family and friends.
New Vision Designs Limited
Rating: 5 out of 5
Extension Builder in Chelsea
Welcome to New Vision Designs, where craftsmanship and attention to detail converge across a spectrum of construction projects. Our proficient team excels in Residential Refurbishment, Commercial Fitout, Full Design and Build services. From METSEC and SFS installations to Drylining, Painting, Decorations, and Mechanical & Electrical (M&E) work, we deliver exceptional results. With a steadfast dedication to quality, we bring extensive expertise and proficiency to each project we undertake.
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Latest review:
Painting & Decorating- 1 Dec 2024
Jay and the team at New Vision Designs were excellent - I was able to leave house, them with keys, returning to tidy, well organised project lasting 5 days. Throughout they sent me whatsapp video updates, kept me in the loop on any milestones... so so greatful and will be using them again soon !
Particle Construction LTD
No reviews yet
Extension Builder in Chelsea
New to MyBuilder Particle Construction is a full-service construction firm specializing in all aspects of building work, from initial extensions to final finishes. With a focus on delivering high-quality results, we handle projects of varying sizes and complexities, ensuring every detail meets the highest standards. Whether it's expanding existing spaces or completing intricate interior finishes, our team combines expertise, craftsmanship, and attention to detail to deliver exceptional outcomes for every client
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Memaar Construction
Rating: 5 out of 5
Extension Builder in Chelsea
Our Expertise MEMAAR Construction is a business specializing in refurbishment, renovation, extension, painting, flooring, decoration, tiling, and demolition services. With a commitment to quality craftsmanship and a customer-centric approach, MEMAAR emphasises personalised service and priorities client needs. The business is supported by an expert team in the construction industry and aims to use sustainable practices while offering affordable pricing without compromising quality. Refurbishment is about improving or refreshing existing structures without making major changes to the layout. It often involves repairs, repainting, replacing fixtures, or upgrading finishes to bring a building back to a good condition. For example: updating office interiors, repairing walls, replacing windows, or modernizing outdated spaces.
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Latest review:
Hard Flooring- 12 Jun 2026
Memaar construction provided a seamless service from start to finish. I’m very grateful to Sayed for his expertise and advice on which type of flooring would be best suited to my home, he was very patient and worked with me to make sure I was happy with my choices. The team did an excellent job and were very professional throughout. They installed high quality LVT flooring in 3 bedrooms, front room and dining room, Plus really lovely carpet to stairs and landing and porcelain tiles to the bathroom and kitchen. Would definitely hire them again really pleased with the result, couldn’t be happier.
Florin
Rating: 5 out of 5
Extension Builder in Chelsea
I’ve got over 10 years experience in roofing industry,I’m a professional person,I’m not doing tipe of work that I never done it before,I don’t leave any jobs unfinished.I have done several roofing jobs for different companies base in London.
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Latest review:
Roofing (Pitched)- 29 Nov 2022
Florin and his team did a very good job fitting a skylight and rubber roof. Communication was very good and the standard of workmanship and overall finish were excellent. I would strongly recommend him
BUILDING ANDREW & GREG LTD
Rating: 5 out of 5
Extension Builder in Chelsea
Welcome to our profile, we are a company specializing in all kinds of renovation and construction works, all the works shown in the photos are made by us, we are diligent and open to all kinds of innovative ideas of our clients, in our opinion there are no impossible things to do, you have to Just think and take action, all the best A&G
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Latest review:
Bathroom Fitting- 2 Mar 2021
Greg and Andrew are nice guys and got the job completed to a good standard.
Uk property solutions (ups) ltd
No reviews yet
Extension Builder in Chelsea
Hello. I have been in the building industry for over thirty years. I’m a competent professional and cover all aspects of the industry. Please don’t hesitate to contact me for professional advise quotations ect.
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Asen Terziev
Rating: 5 out of 5
Extension Builder in Chelsea
I have been working in construction since I was 19.I have qualified as external wall insulation,rendering and plastering!Over the years I have undertaken bricklaying and roofing jobs as well!
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Latest review:
Plastering- 7 Oct 2022
Excellent work, very professional.
Marsden General Builders
Rating: 5 out of 5
Extension Builder in Chelsea
I have lived in Walthamstow, East London all my life and have over 35 years experience in the building trade, particularly in the Walthamstow area, providing me with excellent knowledge of local property's. My expertise is in kitchen extensions, chimney breast removal/rebuild and plastering but cover all aspects of the building trade and am happy to take on any job, big or small. References and visits to previous clients to view my work is always available.
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Latest review:
Kitchen Fitting- 18 May 2017
Cannot fault the work Tony undertook. Completed on time, finished to a very high standard, kept informed (we were away on holiday whilst work was being done). So pleased with the result, my daughter's room is what was the kitchen and looks beautiful. New kitchen fitted with new floor tiles and looks fantastic, boiler was moved etc. Can't recommend Tony enough and I will definitely use Marsdens again.
OWA CONSTRUCTION LTD
Rating: 4.9 out of 5
Extension Builder in Chelsea
We are a medium sized groundwork company based in West London. We have over 18 years groundwork experience. We specialise in Drainage , Basements Reinforced concrete, Foundations, Block and beam , Paving , Fencing Etc . We pride ourselves in our work and customer satisfaction is our top priority.
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Latest review:
Groundwork & Foundations- 7 Feb 2026
Oli carried out the groundworks and demolition at my property and was on site every day with his crew, fully committed and hands-on throughout the job. I am an architect, and this was work on my own home, so my expectations were high. Oli met those expectations fully. He has a strong knowledge of groundworks and demolition, works carefully and methodically, and you can tell he genuinely enjoys what he does and takes real satisfaction in delivering the work exactly as required. He was always in a good mood, easy to communicate with, and a pleasure to have on site. I enjoyed discussing the project and hearing about other jobs he has completed over his 23 years of experience, which clearly shows in the quality of his work. I would highly recommend Oli for any groundworks or demolition works.
Z&S Builders Ltd
Rating: 4.7 out of 5
Extension Builder in Chelsea
Z&S builders are an equal opportunities employer. We are diverse workforce made up of hardworking, experienced people . We provide our customers the best service. Our quality of work is higher and we never compromise with the quality.
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Latest review:
Painting & Decorating- 16 Sep 2021
Don’t trust them they lying in every bit we send them back on the first day of the work
Happy Building London Ltd
Rating: 5 out of 5
Extension Builder in Chelsea
Hello, We’re an architectural design and construction management company with a love of creative inspiration. We help turn dreams and visions into reality for people who aspire to live in exceptional contemporary spaces. Big ideas are our thing. Along with expertly costed build packages. Then there’s our end-to-end project management service, perfect for people who want to leave nothing to chance.
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Latest review:
Restoration & Refurbishment- 17 Jul 2016
Valter was very impressive on his initial visit with some exciting ideas for the house improvements and we had no hesitation in choosing Happy Building above the other two building firms who quoted. Having signed off on the budget and scope of work, Valter's team of builders arrived. We were hugely impressed with the skill, experience and work ethic of the team; the fact that they arrived early each morning smiling underlined the "Happy Building" epithet; Jarek, the site foreman, had an especially cheery demeanour. The work involved stripping the walls back to bricks, removing walls, reinforcing foundations, plastering, extending the bathroom and removing one bedroom to create a large ensuite bedroom. The latter certainly would not have been done without Valter's vision and patience in explaining how it would look. We were able to deviate from the original plans without any problem which was very important in achieving the final look which we had desired. Valter was very careful in sticking to time and budgets which I had never experienced before with builders. The kitchen, bathroom, two bedrooms, living room and hallways were finished to the highest possible specification within our budget. There were one or two small features which, with hindsight, we would have improved such as door handles and shower fittings, however this was down to us not specifying exactly what we wanted. These are very minor details and a tiny part of the overall picture.
Jake Gillam Carpentry
No reviews yet
Extension Builder in Chelsea
I'm a carpenter based in South West London with 10 years experience in the trade. I am flexible in the jobs I undertake and my work is to a high standard. I offer a friendly and reliable service.
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Star 5 construction ltd
Rating: 5 out of 5
Extension Builder in Chelsea
Hi everyone,Star 5 construction Ltd provides best quality of work with affordable price and finish your project with in giving time. For coustmer satisfaction we will provide you our liability insurance details. Our services: New build Extension. New loft conversation and new Roofing. Supply and fit new double glazed windows and doors, with K silicone rendering or Standard plastering. All types interior and exterior design and build. All types supplied and install steel beams. Free quotes and estimate. Many more offers if you need any information feel free to send us email with your plan, happy to provide you all the information.
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Latest review:
Mr singh and his team have done an excellent job,couldn’t have been more happier.Mr Singh’s experience and advice has saved me some serious money.really happy with the final product. It was big and complex task but it was completed in very efficient and professional manner.without any hesitation I’ll be recommending their services to friends and family

4.1

Top rated Extension Builders

Our Extension Builders in Chelsea, are rated 4.1 out of 5 based on 18 reviews from customers like you.

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What types of services are offered by local extension builders in Chelsea?

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

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

What are the hourly rates of extension builders in Chelsea?

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

Find extension builders in Chelsea with MyBuilder

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

Step 2: Compare different extension builders in Chelsea

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

Step 3: Hire Chelsea extension builders with confidence

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

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

What to ask a Chelsea extension builder before hiring?

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

An extension builder in Chelsea 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 Chelsea 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 Chelsea?

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 Chelsea 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 Chelsea 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 Chelsea

Can an extension builder in Chelsea help with planning permission?

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

Many Chelsea 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 Chelsea help with materials and finishes?

Yes, most extension builders in Chelsea 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.