Extension Builders in Clerkenwell

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 Clerkenwell

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London & Kent Best Kitchen & Bathroom Solutions Ltd.
Rating: 5 out of 5
Extension Builder in Clerkenwell
Our highly skilled team of builders, carpenters, electricians, decorators and plumbers are reliable, trustworthy and dedicated to achieving the highest quality finish for your project; however large or small. Each project is tailored to your requirements and managed via a single point of contact.
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Latest review:
Bathroom Fitting- 26 Nov 2020
Sylwester and team did a fantastic job and were incredibly accommodating and polite with all of our requests. Would definitely recommend.
FM Building
Rating: 4.8 out of 5
Extension Builder in Clerkenwell
Honest and friendly company, we here at FM Building focus on complete customer satisfaction and make a promise to our clients to offer best quality services at competitive rates. All projects considered and dealt with in a professional manner regardless of the size or duration.
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Latest review:
Handyman- 12 Oct 2018
The flat was left in a very bad state after the tenants left. Marius was able to undertake all the jobs, from changing carpets, redecorate, repairs and clean up. Also gave good advice as I was not able to attend the site in person so Marius kept me updated with photos. The price was also good. Thank you. Will use these guys again.
UK Safety inspections
Rating: 4.6 out of 5
Extension Builder in Clerkenwell
Full qualified electrician. Gas safety engineer. 18 years experience in London and England. Insurance £2 million. We do EICR, EIC , FIRE, EMERGENCY LIGHTS, PAT, LANDLORD GAS SAFE, HEAT PUMP CERTIFICATIONS.
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Latest review:
Extensions- 7 Mar 2017
Very professional and personable service. Work done to a good standard
SGB Water Engineering
Rating: 5 out of 5
Extension Builder in Clerkenwell
SGB maintain an interactive IT process, to ease transparency and movement of information data, to all parties involved in any one project. We have a combined 25 years professional experience in the civil engineering / construction management. We are experts in water utilities management enabling us to offer a variety of services and solutions in this area.
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Latest review:
Plumbing- 9 Dec 2020
Work completed and problem has been resolved .
REVOSPACE CONSULTING LTD
Rating: 5 out of 5
Extension Builder in Clerkenwell
Revospace – Building Better Spaces Revospace delivers high-quality refurbishments and property improvements across London and surrounding areas. With years of hands-on experience in residential projects, we understand how to combine strong workmanship with structured project management to deliver results on time and within budget. We have worked on full refurbishments, kitchens, bathrooms, flooring, carpentry, decorating and general building works. Our background in site management means we don’t just complete jobs — we plan, coordinate and manage them properly from start to finish. Based in London, we operate across Greater London and Essex, and are happy to travel for the right project. Our strengths include attention to detail, reliable scheduling, transparent pricing and clear communication throughout every stage of the job. We respect your home, keep sites clean and ensure work is completed to a high standard. At Revospace, we believe in doing things once and doing them properly — no shortcuts, no hidden surprises. Quality work. Clear communication. Professional delivery.
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Latest review:
I recently had a full kitchen installation carried out and I’m really pleased with the results. From start to finish, the work was completed to a high standard and everything was done with great attention to detail. The installer was professional, punctual, and easy to communicate with throughout the project. Any issues or questions I had were dealt with quickly and clearly, which gave me confidence that the job was in good hands. The workmanship is excellent – everything is level, neatly finished, and exactly as discussed. They also kept the workspace tidy each day and made sure everything was cleaned up properly once the job was complete. The kitchen looks fantastic and has completely transformed the space. I would happily recommend them to anyone looking for a reliable and skilled kitchen installer, and I would definitely use them again for future work.
Koncore Plumbing & Heating Ltd
Rating: 5 out of 5
Extension Builder in Clerkenwell
*PLEASE ONLY SHORTLIST US IF YOU ARE HAPPY WITH OUR QUOTE* We have many years of experience and, as such, have seen almost every imaginable plumbing and heating emergency that you can imagine, and we can fix them all. We aim to fix every problem on our first visit, in the fastest time possible. NO JOB TOO BIG OR TOO SMALL, WE DO IT ALL!!
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Latest review:
Gas Work- 13 May 2026
Excellent in every respect, communications, flexibility and efficiency of service.
C and C developments
Rating: 4.9 out of 5
Extension Builder in Clerkenwell
I have been in the construction industry for over 30 years I specialise in renovations Carpentry plastering extentions but can cover all aspects of construction and acoustic sound reduction
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Latest review:
Windows & Doors (Wooden)- 7 Jun 2026
What I liked about Conrad was his honesty and ingenuity. He investigated thoroughly where the leak was coming from, and then did an excellent job fixing it, and also making sure any repairs blended well with the existing rendering and wood above the window. He charged me a fair price and was tidy. Would recommend.
PACHO CREATE LTD
Rating: 5 out of 5
Extension Builder in Clerkenwell
Pacho Create specializes in high-quality loft conversions, home extensions, and full refurbishments—transforming homes into beautiful, functional spaces. With a focus on craftsmanship, planning, and client satisfaction, we bring your vision to life on time and on budget. Let me know if you want a more premium, modern, or friendly tone.
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Latest review:
Tiling- 24 May 2026
I cannot recommend John from Pacho Create Ltd highly enough. I'm a very particular client with high standards, I was impressed by his care, patience, and professionalism throughout. He clearly takes pride in delivering quality work and paid close attention to every detail. Living in a small flat, I was concerned about dust, but John proactively created a solution to minimise disruption, which I really appreciated. He also gave excellent advice on budget-friendly waterproofing products. We had a challenge with large-format tiles, but John worked closely with me to plan the layout, ensuring a natural, balanced finish. The workmanship is outstanding – minimal wastage, precise alignment, and superb attention to detail. I wouldn’t hesitate to use John again, in fact, I’m already planning to have him back to tile around my bath in the near future. I highly recommend him to anyone looking for a skilled, reliable professional.
Signature 1 Construction Ltd
Rating: 4.5 out of 5
Extension Builder in Clerkenwell
Signature 1 Construction LTD is a family run business with over 25 years experience in the building industry. We specialise in extensions, loft conversions and full house refurbs. Every job we undertake we take great care of the clients house and are experienced project managers will look after you from start to finish.
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Latest review:
Extensions- 30 Sep 2025
Overall, I’m very pleased with the work Marin has carried out for us and I’m currently in the process of instructing him to do more work. Marin built a high spec cedar shed for us with electrics and plumbing, some brickwork and laid composite decking. Marin came across, honest and reliable, which in itself is rare. He was on site most mornings to make sure his tradesmen were on the right tracks. Like with a lot of these things there were some issues along the way and I was highly impressed by Marin’s ‘no quibble’ approach to rectify any problems. I myself have a high attention to detail and am quite indecisive (nightmare client) and Marin was happy to work with me with changes to the project without incurring extra costs.
NG Construction Team Ltd
Rating: 5 out of 5
Extension Builder in Clerkenwell
Elevate your space with NG Construction Team. Our expert builders and contractors ensures seamless, budget-friendly projects on schedule. Discover the perfect blend of skill and experience for your dream home transformation. We are professionals known for our efficiency, approachability, and exceptional functionality. Our team tackles every job with the skill and experience our clients rely on.
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Latest review:
Plastering- 8 Oct 2022
Excellent, 100%-recommended, 5-stars out of 5! Honest, knowledgeable, careful and conscientious with his work, flexible, hard-working, on-time, good communication (in-person and via txt) and v friendly. My project involved multi-finish/skim-plastering 3 rooms in a loft extension, including various fiddly/tricky bits. I will not hesitate to use Gediminas again for both large and small jobs - many thx :)
Master Builders Developments Ltd
Rating: 4.6 out of 5
Extension Builder in Clerkenwell
Newly Joined My Builder, We are a established Building firm specialising in Extensions, Loft Conversions and Refurbishments, we undertake commercial projects along with substantial size constructions. Our team over all elements of construction.
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Latest review:
Roofing (Pitched)- 26 Sep 2024
Keep this company as first choice for ur building work.
N EXTENSION KINGS LTD
Rating: 5 out of 5
Extension Builder in Clerkenwell
I've been working in building trade for over 15 years , we can undertake any job small and big from foundations to the roof and anything between. We can provide any references,Me and my team take pride at what we do and we do it first time right .our work is second to none , and proof of that is that you don’t pay anything upfront till you are fully satisfied with the quality.
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Latest review:
Great job by Nick and the team, good attention to detail and very helpful, they went the extra mile to get a nice finish and make sure we were happy. We used after a neighbour also had a good experience.
CHIRO Alliance Limited
Rating: 5 out of 5
Extension Builder in Clerkenwell
Chiro Construction covers all types of building work including major renovations, lofts, extensions, commercial conversions and bespoke carpentry. We manage all aspects of the build from inception to completion, from demolition to decorating. With a proven track record of delivering a wide range of high-end projects, we have a 98% approval rating from over 50 positive reviews. Most of our work comes from previous client referrals. Call or email us today for a chat to discuss your project.
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Latest review:
Restoration & Refurbishment- 4 Sep 2020
Octavian is a really great guy, very reliable, never disappoint, maintained good communication with us all the time. As a customer, obviously the most important part is great craftmanship, we have used other teams before and you can easily tell the difference between his work and the others. From things such as painting (you can tell they have paint and sand multiple times to provide such great finishing), tile installation (the gap between each tile is tiny, and they are very flat), Octavian’s team can get them all done. This job involves a full flat refurbishment, so the flat was completely stripped, knocked down a few walls, install new pipes / wire etc. During his work he has spotted many things that we have not noticed before. Unlike some other contractors who do not care, they will just finish what they were asked to do and leave. Octavian spotted it and recommend us the best solution for it, to provide the best outcome for the project. It is important to find someone who do care about the customer and the project. We will use him again for our future projects. Thanks. Tommy
Ndreu builders
Rating: 5 out of 5
Extension Builder in Clerkenwell
Hello,I have 23 years working in construction. I am specialised experience within painting and decorating. I also complete domestic and commercial property refurbishments, silicon rendering, driveway and patio installations, plastering and gardening. I mostly take on all kinds of multi trade work. Please don’t hesitate to contact me for any enquiries.
Get in touch
Latest review:
Handyman- 20 May 2026
He’s friendly and completes the job with care.
Ioan Hrit
Rating: 5 out of 5
Extension Builder in Clerkenwell
With over 13 years experience I'm confident in all aspects of groundworks including new build and extensions from footings up to damp course, drainage and the slab construction, kerb laying, block paving; drives paths, slab laying, septic tank installation and soakaways.
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Latest review:
Groundwork & Foundations- 31 Oct 2025
Fantastic all round service. Ioan is very hard working, very knowledgeable in his field and is very well organised and experienced with the logistics and execution of all types of groundworks. I would highly recommend.
A. plastering
Rating: 5 out of 5
Extension Builder in Clerkenwell
Hi. My name is Fatos. I have been in construction for over 17 years. We undertake rendering, plastering and painting jobs. High standard finish in very competitive prices. We also do loft conversion,roofing, plumbing, electric, tiling, extension ect. Our prioritie is to get the job done in very high quality
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Latest review:
Plastering- 22 Oct 2024
We needed to plaster our house ASAP and Fatos completed it in a short time. The house looks amazing, he was quick, efficient and was a great communicator. I would highly recommend him.

4.1

Top rated Extension Builders

Our Extension Builders in Clerkenwell, are rated 4.1 out of 5 based on 18 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 Clerkenwell?

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

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

What are the hourly rates of extension builders in Clerkenwell?

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

Find extension builders in Clerkenwell with MyBuilder

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

Step 2: Compare different extension builders in Clerkenwell

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

Step 3: Hire Clerkenwell extension builders with confidence

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

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

What to ask a Clerkenwell extension builder before hiring?

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

An extension builder in Clerkenwell 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 Clerkenwell 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 Clerkenwell?

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 Clerkenwell 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 Clerkenwell 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 Clerkenwell

Can an extension builder in Clerkenwell help with planning permission?

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

Many Clerkenwell 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 Clerkenwell help with materials and finishes?

Yes, most extension builders in Clerkenwell 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.