Extension builders in Chelsea

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

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

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 Chelsea

3767 Results

Sort by:

General Building Services
Rating: 5 out of 5
Extension Builder in Chelsea
We are a team of professional tradesmen who provide quality refurbishment services in London .With over 28 years experience in our industry,we provide a comprehensive services. Your project is in safe hands. I am one of the owners of the factory kitchen furniture. Do you want to have a beautiful and very firmly floors, driveways, parking lots, terraces, balconies and other places -to bell.Performs industrial and decorative flooring company Bautech.
Get in touch
Latest review:
Damp Proofing- 14 Apr 2018
Had several quotes and different opinions on how to treat my issue. Ted was by far the most knowledgeable and gave proper advice. The job was completed properly. Timekeeping and cleanliness brilliant. I have already hired him for future work and recommended to another member of my family. Very reasonable cost wise.
Ceca Developments LTD
Rating: 5 out of 5
Extension Builder in Chelsea
Hael Construction Ltd, a proud member of the Federation of master builders, is a trusted construction company based in North London, delivering high-quality building services across the region. We specialise in new builds, extensions, loft conversions, renovations, groundworks, electrical installations, and plumbing. With a skilled team of qualified tradespeople and experienced project managers, we provide a complete service from design to completion. Our focus is on quality workmanship, transparent communication, and delivering projects on time and within budget.
Get in touch
Latest review:
Extensions- 23 May 2022
Ceca Developments have done an outstanding work on our side and rear extension project, and we would definitely recommend this company. Firstly, they have offered a really competitive quote for the work and have been very transparent and detailed in regards to how long it will take to complete the project. Sebastjan has been a pleasure to deal with and was very helpful during the project, providing honest and useful recommendations and being available every time we needed anything. All the work has been completed to a very high standard and to the agreed timelines. We did not have to worry about anything during the whole project, which made this a very pleasant experience.
Atanas Vitanov
Rating: 5 out of 5
Extension Builder in Chelsea
My name is Nass and I have been working as carpenter and joiner for more than 12 years. Providing high qualities standards for clients is my first priority. Dedication to my job and always-aiming 100 % satisfaction are principles in my work.
Get in touch
Latest review:
Handyman- 16 Apr 2026
Atanas arrived on time, completed jobs quickly and professionally at a fair price. Also personable which is great and charged a fair price. I have already asked him to quote for bigger jobs. Highly recommended.
E-H-E Vision construction
No reviews yet
Extension Builder in Chelsea
EHE Vision LTD
Get in touch
Fatos Shira
Rating: 5 out of 5
Extension Builder in Chelsea
I have over 10 years experience in construction, I’m multi trader, I normally do brick work,extensions ,lofts, and ground work and more...
Get in touch
Latest review:
Bricklaying- 18 Aug 2020
Fatos was an excellent choice. We agreed on a price and a date that was within the week and the price was very reasonable. Fatos also did an extra job for that he didn't charge me for even after I offered to pay him for. I was so pleased with Fatos job and experience that I am going to hire him to do more jobs for me. He was definitely one of the good ones excellent workmanship and trustworthy
WM Design & Build
No reviews yet
Extension Builder in Chelsea
I have a lot of experience in construction field. I work with my dad and cousins and we do all type of works. Professional and always on time.
Get in touch
PMB Construction (UK) Ltd
Rating: 4.9 out of 5
Extension Builder in Chelsea
PMB Construction is London based building company delivering exceptionally high standard services, specialise in most building aspects including loft conversions and extensions. PMB Construction (UK) Ltd is fully insured company, we pride ourselves on high recommendations and customer satisfaction.
Get in touch
Latest review:
Extensions- 5 Sep 2019
One of the best builders I have ever worked with. PMB take great pride in the work they do and finish to a exceptional level (even better than a lot of premium and expensive builders in the industry). Colin's knowledge about all aspects of building work is unmatched and that shows in the end product that he and his team delivered for me. PMB did a full refurbishment & substantial extension (everything knocked down except 3 external walls) - ground floor ext, first floor ext, loft extension, full re-wire, plumbing, gas, UFH, walls, plastering, fitting, decorating etc. His prices are reasonable and he advised when unexpected costs come up so I could make a decision on what to do. I will definitely use him again.
Liskerrin Limited
No reviews yet
Extension Builder in Chelsea
Liskerrin is a multi-disciplinary property and construction company. Based in London, we specialise in small to medium sized fit-out projects in commercial, retail and residential sectors. With experienced in-house designers and project managers, we offer a complete service from initial concept design to construction on site.
Get in touch
Home improvement
Rating: 4.3 out of 5
Extension Builder in Chelsea
“Reliable handyman with 7+ years of experience in flooring, plastering, and general home repairs. I take pride in clean work, clear communication, and finishing jobs on time. Available for small to medium projects — no job too and general plumbing
Get in touch
Latest review:
Handyman- 8 Oct 2026
Very happy with the job.Very nice man.Good energy.completed job within good time.
UNDERWAY CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in Chelsea
Here at Underway Construction we cover all aspects of building from extensions, conversions and refurbishments to decking, oak framing and hanging doors. Specialising in first and second fix carpentry with over 10 years experience we work alongside architects and engineers to ensure our clients are always provided a professional and reliable service.
Get in touch
Latest review:
Carpentry- 3 Jul 2023
Henry did a great job installing an internal door for us. Good quality job, kept everything clean and tidy, and smooth communication.
Novus Construction Limited
No reviews yet
Extension Builder in Chelsea
Novus Construction Limited is a trusted building contractor dedicated to delivering exceptional service, high-quality workmanship, and reliable project management. We take pride in completing projects on time, within budget, and with clear, consistent communication throughout the process. To ensure your complete satisfaction and seamless communication, we assign a dedicated project manager to oversee every aspect of your project from start to completion. We specialise in a wide range of services, including but not limited to: • New Builds • Extensions • Loft Conversions • Refurbishments • Bathroom & Kitchen Fitouts • Carpentry & Joinery • Tiling If you’re ready to discuss your project or need expert advice, don’t hesitate to reach out. We’d be happy to offer a free, no-obligation quote and help bring your vision to life.
Get in touch
Aldestone Group
New on MyBuilder
Extension Builder in Chelsea
Aldestone Group provides complete interior and exterior refurbishment services for homes, offices and commercial premises. From individual improvements to full property transformations, we bring together the trades needed to create practical, attractive spaces. Our services include office fit outs, carpentry, plumbing, electrical work, painting and decorating, alongside general refurbishment and finishing. Whether you are updating a home, refreshing a property's exterior or preparing a workspace for your business, we tailor the work to your needs, style and budget. We understand that a successful refurbishment depends on both the overall result and the smaller details. Our approach centres on careful planning, clear communication and attention to the finish, helping each part of the project come together smoothly. By bringing interior and exterior works together through one company, Aldestone Group makes it easier to coordinate different trades and maintain a consistent standard throughout your project. From the first conversation to the final finishing touches, our aim is to deliver spaces that look good, work well and are ready to use.
Get in touch
SM Refurbishment Ltd.
Rating: 5 out of 5
Extension Builder in Chelsea
SM REFURBISHMENT LTD. is a well established company that has been in business for over 10 years and provides a comprehensive suite of building services. Our carefully selected team have a broad range of experience. If you are looking to extend, convert, refurbish or redecorate your property, we are here to assist you all the way from concept to completion offering individually tailored services. We are also specialists in carpentry and joinery projects as well as kitchen and bathroom refurbishment. We are FENSA accredited windows and doors installers.
Get in touch
Latest review:
Restoration & Refurbishment- 21 Nov 2023
Slawek and Andrew did an amazing job on the front and side of our terraced house. The quote was fair (and they stuck to it) and the attention to detail was refreshing. We were kept informed throughout the works - communication was excellent. I whole-heartedly recommend SM Refurbishment.
Neli Limited
Rating: 4.6 out of 5
Extension Builder in Chelsea
Neli limited builder’s are a company based in London with over 10 years of experience in our trade, We cover a whole range of jobs including: • Slabbing ( all types ) • Astro turf • Turfing • Decking • Fencing • Block paving Thanks Neli
Get in touch
Latest review:
Landscaping- 28 Oct 2026
Neli took over our patio project after another builder, who claimed to have over 20 years of experience and excellent five star reviews, left us with very poor workmanship. Neli stepped in and redid the patio to the agreed specifications. The only downside was that the work took a few weeks longer than expected for various reasons. However, the patio has now been completed as agreed, and I’m happy with the final result. I appreciate Neli taking on a job that another builder had left in such a poor state and would recommend him.
David's
No reviews yet
Extension Builder in Chelsea
An experience trade person, great treat to all the customers also good worker and professional jobs with great results. Always like to give my customers good results with a good price
Get in touch
Home & Office Improvements Ltd
Rating: 5 out of 5
Extension Builder in Chelsea
We are a long established family business based in Greenford, Ealing. We cover all aspects of Plumbing & Heating, we also install all types of boilers, boiler repairs, boiler breakdown, boiler service, central heating systems, AGA-Rayburn cookers repair & Service, quality kitchens and bathrooms.
Get in touch
Latest review:
Arrived on time. Very professional. Gave consultation and did the job in good time.

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.