Extension Builders in Chelsea

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (19 reviews)

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

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Some of our top rated extension builders in Chelsea

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Electrical
No reviews yet
Extension Builder in Chelsea
Electrical work
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New tech design&build ltd
No reviews yet
Extension Builder in Chelsea
We run a business which aims to exceed the customers expectation. We work closely with each client to ensure that we offer the very best service possible, our goal is to provide 1st class services. We work to an extremely high standard and are meticulous with cleanliness and hygiene , we understand the importance of keeping our customers' homes clean, and this reflects by our customer reviews We regularly review our pricing to ensure we are always competitively priced.
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J&S Wallington
No reviews yet
Extension Builder in Chelsea
Our company specializes in the construction of lofts and extension, We also make bathrooms and kitchens.
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Imeraj
No reviews yet
Extension Builder in Chelsea
I am a construction worker . I had 5 years working for a civil engineering company like supervisor . I have lot of skills referring construction ( steel erection , timber works , underground works etc ) . Last year i finished level 1 and 2 in plumbing aswell to complete more professional skill and manage the common problems in most of new and existing properties . Contact me if you have something and let proceed to fix or upgrade your properties .
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Roman Levitskyi
Rating: 5 out of 5
Extension Builder in Chelsea
I offer a full range of renovation work🏣🚐
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Latest review:
Carpentry- 31 May 2026
Words Can’t describe how I feel about this Man, Roman is an amazing individual who is so selfless and devoted, professional, friendly and faithful to his Words. I tasked him with a milestone and he went 10 milestones. I couldn’t be happier to have him in my house for this job. I highly recommend him. His charges on top of that is more than reasonable. I can go on and on, that’s because I’m trilled with the exceptional job he’s done for me Thank you again Roman.
Elite Constructions London
New on MyBuilder
Extension Builder in Chelsea
Elite Construction London Ltd has been one of the top providers of building and remodeling services in London for more than ten years. Our goal is to offer high-quality services at affordable prices. We complete projects on schedule and within budget because we are dedicated to quality and client satisfaction.
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Arworks
No reviews yet
Extension Builder in Chelsea
I have had the privilege of working on a 260-year-old Grade Listed building in Islington, London, under the close supervision of conservation inspectors. This project required a careful balance of tradition and innovation — I combined the use of modern machinery externally with traditional, delicate methods internally to ensure the building remained completely scratch-free. My experience has given me a deep respect for heritage projects as well as the skills to deliver high-quality results on modern refurbishments.
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R KELLS LTD
No reviews yet
Extension Builder in Chelsea
Hello, and welcome! I’m Rkan the owner and lead builder of R KELLS LTD . With years of experience and a commitment to exceptional quality, I’m proud to be known as one of the best builders in London. Whether you’re looking to renovate, extend, or start a completely new project, I bring both expertise and passion to every job. I work closely with my clients to ensure that their vision becomes a reality, on time, on budget, and with the highest standards of craftsmanship. My focus is always on providing a hassle-free experience and delivering outstanding results. Let’s create something amazing together!
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Acumen Property Services Ltd
No reviews yet
Extension Builder in Chelsea
We undertake projects including minor & major refurbishment within the domestic and commercial fields. We have specialist personnel capable of managing cyclical repairs, voids, kitchen & bathroom refurbishments, electrical and mechanical engineering, plumbing and gas (gas SAFE), carpentry, double-glazing, plastering & decorating.
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Basarab Extensions & Brickwork
No reviews yet
Extension Builder in Chelsea
Basarab Brickwork provides professional brick and block work with a strong focus on quality, reliability and attention to detail. We specialise in house extensions, garden walls, repointing, structural alterations and general brickwork repairs. With years of experience on residential and construction projects, we take pride in delivering clean, durable workmanship and clear communication from start to finish. Customer satisfaction and a tidy job site are always a priority. Free quotes available.
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Rrapi LTD
No reviews yet
Extension Builder in Chelsea
Rrapi Ltd has over 20 years experience in the construction industry , a specialist contractor delivering high-quality Groundwork’s, Basement, New Build, Demolition , and Reinforced Concrete solutions, particularly for Commercial and Residential projects in London and surrounding areas. As a CHAS accredited contractor, we ensure the highest standards of safety and compliance on all sites We understand the challenges of complex, tight-access sites and pride ourselves on delivering safe, high-precision, and reliable structural work. Groundwork’s Basement’s New Build Underpinning Demolition Civil & Concrete Frames
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Rightpath builders ltd
No reviews yet
Extension Builder in Chelsea
Rightpath builders specialise in loft conversions and over 16 years of experience on board we assure the quality you require.
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S&R Consultancy
Rating: 1 out of 5
Extension Builder in Chelsea
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.
Hartley Services Group Ltd
No reviews yet
Extension Builder in Chelsea
Hartley Services provide professional care in assisting and carrying out the required needs to fulfill your desired outcome from thoughts to plans to reality. With pride ourselves with over 2 decades of experience which is passed onto your projects.
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Grzegorz
No reviews yet
Extension Builder in Chelsea
work we do: Bathrooms, general construction, driveways, fences, kitchens, whole house renovations and tiles, floors, painting, carpentry, electrics, plumbing
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Amc building Ltd
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Extension Builder in Chelsea
amcbuilding
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4.2

Top rated Extension Builders

Our Extension Builders in Chelsea, are rated 4.2 out of 5 based on 19 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 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.