Extension builders in Chelsea

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.6 (19 reviews)

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Some of our top rated extension builders in Chelsea

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Ajila Limited
Rating: 4.5 out of 5
Extension Builder in Chelsea
Ajila Limited is a professional construction company specializing in house refurbishment. With a commitment to quality craftsmanship and attention to detail, we transform homes to meet the highest standards of functionality and style. Whether it's a full renovation or specific improvements, our experienced team delivers exceptional results that enhance both the beauty and value of your property. The company engages in multiple trades which includes plumbing, kitchen, bathroom, tiling, extension, home refurbishment etc
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Latest review:
Plumbing- 2 Apr 2025
Great service and good price. Thank you
Perfect House Building Service Ltd
Rating: 5 out of 5
Extension Builder in Chelsea
Company is open in 2015 . My experience in building and house refurbishment is 20 years . I finish building school in Poland when I spent 6 years on building side after school . In 2004 I move to England and I spend 11,5 years on building sides like self employed , 2,5 years I decide open my own ltd company . Work undertake by my company is house extension , lofts all types , full house/flats/offices refurbishment .
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Latest review:
Krzysztof has worked for me on many projects both residential and commercial. He is highly experienced across many skill sets, a master problem solver/ solution finder, trustworthy and reliable. I would recommend him as 1st choice on any project.
13-13 BUILDERS LTD
Rating: 4.5 out of 5
Extension Builder in Chelsea
I do plastering, plaster board, carpentry, partition, roofing, groundwork’s, driveways, gardening, extension, loft conversions
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Latest review:
Carpentry- 25 Apr 2026
Very helpful, fixed my front door sill and other odd jobs around the house. Would call again and good quality
MS builder
Rating: 5 out of 5
Extension Builder in Chelsea
My company working in construction field from last 6 years. With the help of many years experience we finish our work with good quality on time and provide customer satisfaction.
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Latest review:
MS builder done our house refurbished and renovated, they provide very qualitative work. Their team members are very helpful.
B&D Construction London Ltd
Rating: 5 out of 5
Extension Builder in Chelsea
Hi Our company undertake jobs ,Loft Conversion, Extensions, Carpentry, Gardens, Plumbing/Electrical , Plastering and Decorating,
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Latest review:
We’ve had multiple jobs done by Silviya. The first was a small extension and downstairs and partial upstairs refurbishment with new kitchen and 2 bathrooms fitted. This large job was completed within 16 weeks and looks exactly as we hoped. Given the extent of works we moved out for the build. The second was the construction of an outbuilding and garden redesign (patio and astro fitted). Again the results are great. We lived in during this project and I worked from home without disturbance. The latest has been the re-fit of new windows, front door and fixing the front render. Again, the results are very professional and minimal disturbance while the work took place. Will definitely use him and his team again, should we need any more building work and recommend them to others
Primos Construction
No reviews yet
Extension Builder in Chelsea
I have worked both in social housing and self employed. Most of my jobs as a sole trader has come from recommendations of people I've worked for. I am a stickler for time. In my business I aim to give the clients exactly what they've ask for and always always have the clients full satisfaction before leaving a job. Referral can be obtained before my employment
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PD Construction Services Limited
No reviews yet
Extension Builder in Chelsea
We deliver high quality domestic refurbishment services in all of London and the surrounding areas. We undertake all building work include: House Extensions and Conservatories Loft Conversions Full House Refurbishment General Building Joinery and Carpentry Painting, decorating Bathroom remodeling Kitchen refurbishment Foundations Garage conversions Residential Renovation Electrics and Plumbing Patios, paving and fencing
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Bendev Construction 2018 Ltd
No reviews yet
Extension Builder in Chelsea
Family business with experience in new builds, extensions and refurbishments
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Davis-Brady construction limited
Rating: 5 out of 5
Extension Builder in Chelsea
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.
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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
Geometric Renovation Ltd
Rating: 5 out of 5
Extension Builder in Chelsea
Geometric Renovation is a London based renovation and construction company specializing in high quality renovations, maintenance and remodelling services with affordable price and highest standards. We also cover the Greater London area.
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Latest review:
Painting & Decorating- 6 Aug 2022
Good Job, friendly and helpful
Ava Constructions & Decors
Rating: 4.9 out of 5
Extension Builder in Chelsea
Ava Constructions & Decors Ltd is a UK-based construction and renovation company committed to delivering top-quality craftsmanship and reliable project management. We specialise in full refurbishments, extensions, bathroom and kitchen installations, and commercial fit-outs — always tailored to the client’s vision and delivered to the highest UK building standards. With a keen focus on transparency, timelines, and customer satisfaction, Ava Constructions has earned the trust of homeowners, investors, and developers alike. Punctuality and completion of work on time are a priority .Our team always respect the client wishes and work with them to achieve the best possible results to their satisfaction. Thank you in advance
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Latest review:
Extensions- 16 Apr 2026
I would not recommend this builder based on my experience. Instead of using crushed concrete they used soil to fill the house flooring for underfloor heating. 1 The project suffered from poor communication, repeated delays, and a lack of clarity around responsibilities. There were serious issues with the foundation works, which failed Building Control inspection and now require remedial engineering input before works can proceed. The site was also left incomplete and not in an acceptable condition. Despite substantial payments being made, key documentation, technical responses, and follow-through were lacking, leaving me to resolve major compliance and structural issues independently. My experience has resulted in delay, additional cost, and considerable stress. I would strongly advise others to ensure there is a detailed written contract, clear scope of works, and defined accountability
Bricklayer
No reviews yet
Extension Builder in Chelsea
I’m an experienced and reliable bricklayer providing high-quality workmanship across all aspects of brick and masonry work. I take pride in delivering clean, professional results and ensuring every customer is completely satisfied with the finished job. My services include bricklaying for house extensions, garden walls, repairs, and structural alterations, as well as specialist repointing to restore and protect older brickwork. I also carry out damp-related repairs such as replacing damaged bricks, improving pointing, and fixing areas where water penetration has caused issues. Whether it’s building a brand new extension, repairing damaged brickwork, or restoring existing walls, I focus on attention to detail, durability, and a tidy job from start to finish. I’m happy to offer advice, honest quotes, and solutions that suit both your property and your budget. Customer satisfaction is my priority, and I aim to complete every job to a high standard that will last for years to come.
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London city builder
No reviews yet
Extension Builder in Chelsea
London City Builders (LCB) is a professional who specialises in designing and creating stunning interiors for high-end homes. We have a deep understanding of the latest trends, materials, and techniques in interior design and can transform any living space into a beautiful and functional work of art.
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grantconstruction0
Rating: 5 out of 5
Extension Builder in Chelsea
The construction company carries out and performs a full range of complex interior finishing works, general contracting for the repair and reconstruction of buildings and premises in commercial areas. The main direction in which the company operates is commercial real estate: shopping, entertainment and office centers, factories, hotels, logistics complexes and scattered throughout London will undertake any repair and restoration work. We use only high-quality materials and tools to ensure the highest quality of work, in addition, we always adhere to the agreed deadlines and budget, which allows our clients to be confident that the repair work will be completed on time and without unnecessary costs
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Latest review:
Tiling- 4 Oct 2026
After some confusion about when arriving. Went well. Ensure clear understanding, prior to work starting, on who is providing materials while agreeing costs. Would recommend.
NKN HOME CREATIONS LIMITED
Rating: 5 out of 5
Extension Builder in Chelsea
We are a reliable and experienced construction company committed to delivering high-quality workmanship with care and attention to detail. We specialize in home extensions, refurbishments, new builds, and loft conversions, ensuring every project is completed safely, professionally, and to the highest standards.
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Latest review:
Plastering- 2 Feb 2026
Happy with work, left job site tidy and clean. Will be happy to use company for future work. Thanks
BATKHUYAG BALJINNYAM
No reviews yet
Extension Builder in Chelsea
I working 20 years in the building. Started working labour and now can do plastering, kitchen and bathroom installing , carpentry and decorating jobs
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4.6

Top rated Extension Builders

Our Extension Builders in Chelsea, are rated 4.6 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.