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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TZ Construction Ltd
Rating: 4.8 out of 5
Extension Builder in Clerkenwell
Family business run by father and son since 2018. We are specialized in structural alterations including extensions and conversions, from foundation to a key turn. With plenty of projects finished over the years, we are confident to provide excellent quality, delivering your project on time. You can find us every year on construction exhibitions in Bicester and Farnborough. Sincerely Thomas & Ziggy
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Latest review:
Carpentry- 1 Feb 2025
Very happy with the work carried out. Very pleasant experience. Tomaz was very friendly and completed the job in a timely manner.
Liviu Florin Costache
No reviews yet
Extension Builder in Clerkenwell
Hi everyone, We are a very enthusiastic team, positive and polite. Confident that we are going to find a suitable solution to every obstacles arisen, with a professional approach. We undertake, extensions, refurbish houses form A-Z, tilling, bathrooms, repartition rooms, dry lining works (partitions, soundproofing, isolation) wall repairs, celling's, we stand up with a years of experience.
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Go Plumbing services LTD
No reviews yet
Extension Builder in Clerkenwell
Here at Go Plumbing Services we offer a huge variety of services from tap repairs, bathroom installations to full property maintenance. Established in 2005 Some of our recent works have included: Full bathroom rip outs and installation Toilet/sink/tap changes Re tilling small and large areas Fully high quality painting of walls and wood work. Full re wiring of electrics to single socket changes. Tap repairs Out side tap installation Carpet cleans using organic cleaning products only. Internal Door changes/repairs. Full End of tenancy cleans. Our company is fully insured. All our staff are fully DBS checked. Thank you for reading Joe
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Ideal construction
Rating: 5 out of 5
Extension Builder in Clerkenwell
Hi my name is Paul, my company has only just started as a business, but we have been in the building game for nearly 40 years working for previous companies.
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Latest review:
Extensions- 11 May 2022
Excellent work, everyone on site was professional and let the neighbours know what was happening. Completely the job to a high standard on time and on budget. Would use again without a doubt.
A & A Build and Design
No reviews yet
Extension Builder in Clerkenwell
Refurbishment, Extensions, New build, Design and Maintenance of any domestic building project.
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Lrp brickwork
No reviews yet
Extension Builder in Clerkenwell
Hi there I am a solo trader I do private work on my own or if the job is big enough will take people on with me I am able to build any type of house /garden wall /porch / piers /extension anything you can think of i am more than capable. I normally undertake new house builds garden walls repaired and also rebuilt or building as new also extension any type of extra space that you require.
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Sb landscapes
Rating: 5 out of 5
Extension Builder in Clerkenwell
Sb landscapes & groundworks LTD are a small friendly run business that pride ourselves with our very high standard of work offering a free no obligation quote. All works completed is fully guaranteed and covered by public liability insurance. Sb landscapes also offers waste disposal to and fully licensed to do so.
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Latest review:
Landscaping- 2 Oct 2025
Shay and his team knew what they were doing . Always on time . Listened to our requirements. Very happy with job .
Ktech Group LTD
Rating: 5 out of 5
Extension Builder in Clerkenwell
We are a construction company that specialises in compliance works and social housing. We work with the best engineers to ensure our projects are carried out successfully with the best appraisal possible. Contact us today to discuss your project and set up a consultation. Our service areas include London, Kent and Southern East counties.
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Latest review:
Carpentry- 7 Aug 2025
Ash and his team from Ktech did a great job installing the flitch beam to structural spec. The job required real effort, coordination and attention to detail and they delivered. Professional, reliable and easy to work with. I’d strongly recommend them.
JDS Brickwork
Rating: 5 out of 5
Extension Builder in Clerkenwell
I've been a bricklayer for 30 years I do all kinds of brickwork from garden walls to extensions and new house builds.patios ,driveways ,drainage and groundworks
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Latest review:
Bricklaying- 11 Nov 2017
Did a fantastic Job. Gave me a very reasonable quote. Ordered the materials and was very neat while doing the job. Cleaned up afterwards. The wall was built beautifully and exactly how I wanted it. The job was done within the specified time. I recommend Jon very highly.
H M Renovations LTD
No reviews yet
Extension Builder in Clerkenwell
We are a professional construction and renovation team based in the UK, operating under HM Renovations Ltd. Our team includes experienced electricians, plumbers, carpenters, and builders, allowing us to handle a wide range of residential and commercial projects from start to finish. We specialise in: Full property renovations and refurbishments Shop fitting and bespoke counter installations Bathroom and kitchen installations Plumbing, electrical, and carpentry work General building and maintenance We pride ourselves on high-quality workmanship, reliable service, and clear communication throughout every project. Fully insured and committed to customer satisfaction.
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As2 construction Ltd
No reviews yet
Extension Builder in Clerkenwell
AS2 Construction Ltd , where craftsmanship meets innovation. As a leading construction company, we specialize in delivering high-quality projects tailored to meet your vision. Our dedicated team of experts ensures excellence in every detail, making us your trusted partner in construction solutions. Explore a seamless blend of expertise, reliability, and creativity with AS2.
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Nms building ltd
No reviews yet
Extension Builder in Clerkenwell
Kitchen extension Loft conversion and internal alterations
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Kiwi Eco Ltd
Rating: 5 out of 5
Extension Builder in Clerkenwell
Small Company with very talented trades with over 10 years of experience in construction industry. Delivering trust and high standard for small to medium size projects. Satisfactory of client is no. 1 priority for us
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Latest review:
Plumbing- 22 Feb 2024
Easy to communicate with Lukas. And fair price with his jobs.
Concept Infrastructure Limited
Rating: 5 out of 5
Extension Builder in Clerkenwell
We are a family run business with over 30 years experience in all aspects of the Building Industry and we are all fully qualified tradesemen. We are a flexible and versatile Company that will always spend that extra time in looking after our customers needs. In our experience by completing Projects on time, in budget and to the customer’s requirements, we continue to receive repeated business from our customers. “Basically, From Concept to Completion we've got it covered”
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Latest review:
Extensions- 6 Aug 2020
I’ve lost count of how many times we’ve said how lucky we were that we chose Bryan and his team to build our kitchen extension. The team went above and beyond to ensure as little disruption as possible, as we remained living at home whilst the work took place. During this difficult time, Bryan did everything possible to source the materials required to finish our build before our baby arrived and some how he managed it! His team were really friendly and the family miss having them around. They always tidied up after themselves before leaving too. What we thought was going to be a stressful time was in-fact the opposite. Bryan managed the whole process, kept us updated throughout and made sure the build remained on budget. The level of finish is of the highest standard, better than we could have imagined and I can’t recommend Concept enough. We will undoubtedly be using them again for work in the future. Thanks again to Bryan and his Team.
Paramount Works Ltd
No reviews yet
Extension Builder in Clerkenwell
With over 20 years of experience, Paramount Works specialises in Kitchens, Bathrooms, Bedrooms, Extensions and Loft Conversions. We proudly serve London, Buckinghamshire and Birmingham. At Paramount Works, we’re committed to delivering the highest standards of craftsmanship and service ensuring your vision and satisfaction are always our top priorities.
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Marius
Rating: 5 out of 5
Extension Builder in Clerkenwell
If you have small or big project that you want to bring to life, I am happy to help you. I offer a wide range of services bathroom and kitchen fitting, plumbing, painting and decoration, new buildings, porch and house extensions general domestic maintenance. Give a call for enquiries and quote
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Latest review:
Bathroom Fitting- 19 Mar 2026
The work was carried out most efficiently and to a very high standard. We are 100% happy with the final presentation of the work carried out and we would have no hesitation in refering Marius's work to any prospective clients in the future.

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.

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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.