Extension Builders in Barnsbury

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (20 reviews)

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Some of our top rated extension builders in Barnsbury

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K&L Construction
Rating: 5 out of 5
Extension Builder in Barnsbury
We are a group of experienced contractors specialised in brick work, block work,tiling,rendering,plastering&decorating also in structure work,installing new beams, forming new floor levels & stud walls.We are more than happy to take on board all types,sizes & shapes of works & well prepared for a challenge.We as a team cover all building sector(BUILDING,PLUMBING,ELECTRIC,DECORATING,ALL IN ONE & MORE) so please don't hesitate to give us your trust and we promise you that we will deliver
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Latest review:
Conversions - General- 21 Jun 2025
Working with Petrit was a very pleasant and enjoyable experience. He and his team are friendly and open for discussions. They’re quick, affordable, and help with decision making. Would hire again! Have to say as well, as a woman, Petrit and his team treated my husband and I equally, unlike my experience with other tradesmen who direct all their conversations to the men. Petrit knocked opened up our living kitchen area, laid herringbone floors, replastered the property, installed new radiators, added a built in ladder to our attic, and re did our bathroom. He also helped us match the floor boards from an existing room and helped us source front and back doors for much better price than what we were getting quoted in East London. The painting of the entire house was done in a rush as we needed to move in, so the attention to detail fell down a little here compared to everything else that was done, but I wouldn’t hesitate to work with Petrit again!! After and before pics included!
London & Kent Best Kitchen & Bathroom Solutions Ltd.
Rating: 5 out of 5
Extension Builder in Barnsbury
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.
SGB Water Engineering
Rating: 5 out of 5
Extension Builder in Barnsbury
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 .
KML BUILDING (UK) ltd
Rating: 4.5 out of 5
Extension Builder in Barnsbury
KML is a Central London-based building company with a strong reputation for quality, reliability, and attention to detail. We specialise in home extensions, refurbishments, HMO conversions, and general building works — providing tailored solutions for both residential and commercial clients. As a small, hands-on team, we offer a personal service from start to finish, ensuring every project meets the highest standards of craftsmanship and compliance.
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Latest review:
Bathroom Fitting- 13 Oct 2025
Camilo was supposed to meet me today to give me a quote. He missed our appointment without any notification. I am not here to chase people to do their job. The job will be advertised again, as he was not hired.
C and C developments
Rating: 4.9 out of 5
Extension Builder in Barnsbury
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:
Plastering- 26 Apr 2026
Conrad was absolutely amazing from start to finish - absolute gentleman, superb craftsmanship (walling off two double doors: plastering, skirting, paining etc). Very personable and great communication. Would highly recommend and would certainly hire again. Thanks Conrad!
Yida Design and Construction Ltd
Rating: 5 out of 5
Extension Builder in Barnsbury
Yida Construction is a limited company based in Central London. We are a very reliable and professional team of tradesmen with over 10 years of experience in the building industry, committed to delivering the highest levels of quality and service to our clients.
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Latest review:
Restoration & Refurbishment- 26 Jun 2022
Tommy was a wonderful perfectionist and has done beautiful work in our stairway and hallway which had needed refurbishment for a very long time. It feels brand new. The flooring is perfect both in the hall and staircase, and the walls are now perfectly smooth and painted immaculately. Friendly and accommodating, we will be hiring again for more jobs in the future, undoubtedly. Thank you.
First Choice Builders
Rating: 4.9 out of 5
Extension Builder in Barnsbury
Christopher Graham -Level 1,2,3 in Bricklaying Trowel Occupations. -NVQ Level 1,2,3 -Professional Development Diploma in Historic Building Conservation and Repair -Stone and Brick Repair for Historic Building Restoration -Building and Pointing with Lime Mortar In 2010 I started up First Choice Builders and haven't looked back since. Taking on all Bricklaying works, Fully Qualified with 15+ years experience. Have done extensive courses on Repointing and Brick Restoration. Mastering Tuck, Weatherstruck, Flush and all other types of pointing. Top quality brickwork guaranteed. Also have tower scaffold £150 per week hire. Which should save on getting a proper scaffolding which is a minimum of around £400. Please give me a call for a free quote.
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Latest review:
Bricklaying- 11 Mar 2026
Great Job by Chris, fairly priced and completed on time. Thanks
Su Su Construction Limited
Rating: 5 out of 5
Extension Builder in Barnsbury
Welcome to Susu Construction: Your Premier London Construction Partner Are you searching for a London construction company that stands out for its excellence, commitment, and innovation? Look no further than Susu Construction, your go-to choice for top-notch construction solutions in the bustling capital of London.
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Latest review:
Groundwork & Foundations- 2 Dec 2022
We are very happy and glad to have found Su Su Construction. It is great to work with such an open minded contractor who is very experienced and diligent. To us architects it is really important to be able to explore alternative means of construction in order to create long lasting, beautiful and healthy environments and with SuSu we are on the right track. Highly recommend.
Restoration and Refurbishment Specialists Limited
Rating: 5 out of 5
Extension Builder in Barnsbury
Cubitt Wren is a London refurbishment and restoration firm. Full refurbishments, renovations, extensions, kitchen and bathroom installations, loft conversions, and restoration of period and listed homes. Every job is run directly by a Project Director of the firm. Work is delivered by our in-house trades — carpentry and joinery, plaster, stone, tiling, decoration. One team, one point of contact. Written scope and fixed pricing before we start. Clear programme. Transparent variations — any change priced and approved in writing. A real defects period after handover.
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Latest review:
We used Cubitt Wren for a full interior renovation earlier this year while we were away over the Easter period, and I honestly could not be more pleased with how everything turned out. They took on the lot, a brand new kitchen, a bathroom en suite, and a full repaint throughout the house. What really stood out to me was how smoothly the whole thing ran from start to finish. Whenever my input was needed on design choices or finishes, I heard back quickly by email and everything was explained clearly. I never felt kept in the dark, which as someone who wasn’t on site made a real difference. Coming home to the finished result was just lovely. The whole place felt fresh and beautifully done, and it was a joy to walk back into. I would highly recommend Cubitt Wren to anyone looking for quality renovation work. You also get a dedicated project manager who keeps you updated throughout, which is such a reassurance when works of this scale are going on. A wonderful experience from beginning to end.
TPR Builders
Rating: 5 out of 5
Extension Builder in Barnsbury
I have worked as a builder for the past seventeen years in London. I have done many projects ranging from lofts and extensions, I have gained experience over the years. My goal is to work in my local area.
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Latest review:
Kitchen Fitting- 29 Nov 2025
Pawel did a great job replacing a roof light and repairing two walls on our home office - an efficient, reliable and knowledgeable contractor.
First Int. Project Limited
Rating: 4.4 out of 5
Extension Builder in Barnsbury
Back on MyBuilder after 7 years !!! Design and build Architectural team Structural engineers team Build and construction Our business is based on TRUST | QUALITY | CARE Our company cover the following trades: -steel erecting - steel structures -roofing - loft conversions -plasterers - internal skimming -painters and decorators -kitchen installers -bathroom fitters -bricklayers - for extensions -landscapers -electricians -gas engineers -carpenters - floor, doors, structural -windows installers -bespoke furniture
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Latest review:
Bathroom Fitting- 15 May 2017
We hired Inside/Outside to re-do our bathroom. New sink, bath, toilet, tiles, lower ceiling, re-hang the door and move the radiator. They were polite, honest, professional and very hard working. When they came round to quote they were noticeably more thorough and showed more attention to detail than others. Their quotes were very competitive, their work was good and they removed all the rubbish as well. They also came back afterwards to check everything was working and to deal with a couple of 'snags'. We will be using them again.
City Building and Roofing Ltd
Rating: 4.9 out of 5
Extension Builder in Barnsbury
City Building and Roofing Ltd provides professional roofing, refurbishment and building services across London and Surrey. Our services include roof repairs, new roofs, flat roofing, GRP roofing, roof refurbishment, guttering, fascias and soffits, chimney work, damp proofing, brickwork and full property refurbishment. We work with homeowners, landlords and commercial clients, delivering reliable workmanship, honest advice and free no obligation quotes.
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Latest review:
Damp Proofing- 26 Mar 2022
Good,timely and clean workers. Worked hard and efficiently with clear explanations. Very satisfied with the finish.
Signature 1 Construction Ltd
Rating: 4.5 out of 5
Extension Builder in Barnsbury
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.
H&J Properties 02 Ltd
Rating: 5 out of 5
Extension Builder in Barnsbury
H&J Properties is your friendly, reliable small team with over 10 years of experience in the building industry. We design, plan, build, and project manage, so you can rely on us for a full round of service. From floor and wall tiling to full kitchen and bathroom installations, we’ve got your home covered. We handle plastering, painting, drylining, insulation, and more with precision and pride. Need a loft, rear or basement extension, a new roof, or concrete work? No problem. Whether it’s bricklaying, basement waterproofing, or installing windows and doors, we bring craftsmanship and care to every job. Big or small, we build it right. Please message us directly for more project images.
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Latest review:
We have contracted H&J Properties for our house refurbishment in London. I was impressed with the team's professionalism and project management from start to finish. We had no plans or planning approved, so we wanted a design and build company who will be able to look after the project from start to finish. They did just that. Working with the architects and the planning application before starting the project planning. As always, there are, of course, unforeseen issues arising with the old houses in london but I could't be happier with the communication received from the team. Thanks for the great job.
LDN Construction
Rating: 4.6 out of 5
Extension Builder in Barnsbury
With over 20 years of experience, we specialise in loft conversions, roofing, extensions and more. We primarily operate in Greater London, Our team possesses diverse skills and knowledge, ensuring top-quality results. We take pride in delivering exceptional customer service, professional workmanship, and thorough aftercare. Choose us for your next project and experience the best in the business.
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Latest review:
Bathroom Fitting- 28 Nov 2024
in my place, everything looks fine. but they used long screws penetrated the downstairs pipeline, which made my life very hard, intense relationship with neighbors, neighbors tries to break in. and this problem is still going on. i don't know how to fix it.
LEBELLE HERITAGE & RESTORATION LTD
Rating: 5 out of 5
Extension Builder in Barnsbury
Lebelle Heritage & Restoration Lebelle Heritage & Restoration is a professional building and construction company specialising in renovations, refurbishments, and heritage restoration. We take on all types of projects, from full property renovations and structural upgrades to detailed interior finishes and the careful restoration of period features. Our team is skilled in both traditional craftsmanship and modern construction methods, allowing us to deliver work that is reliable, high-quality, and built to last. Whether we’re restoring the character of an older property or breathing new life into a modern home, we focus on precision, honesty, and clear communication throughout every stage of the job. We pride ourselves on delivering clean, efficient, and well-executed work that meets the needs of our clients and respects the integrity of each building. At Lebelle Heritage & Restoration, we build, renovate, refurbish, and restore with a commitment to quality and long-term durability.
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Latest review:
After a previous contractor took our money and left our loft extension unfinished, we were devastated and worried about how we would ever get our home back to normal. Then Lewis from Lebelle stepped in and completely turned things around. Lewis was patient, understanding, and incredibly professional. He worked quickly, kept costs under control, and finished the loft extension to a standard we’re so happy with. The stress he took off our shoulders was unbelievable. We honestly can’t thank Lewis enough. If you’re looking for someone trustworthy, skilled, and genuinely caring, Lebelle is the company to call.

4.2

Top rated Extension Builders

Our Extension Builders in Barnsbury, are rated 4.2 out of 5 based on 20 reviews from customers like you.

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What types of services are offered by local extension builders in Barnsbury?

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

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

What are the hourly rates of extension builders in Barnsbury?

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

Find extension builders in Barnsbury with MyBuilder

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

Step 2: Compare different extension builders in Barnsbury

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

Step 3: Hire Barnsbury extension builders with confidence

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

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

What to ask a Barnsbury extension builder before hiring?

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

An extension builder in Barnsbury 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 Barnsbury 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 Barnsbury?

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 Barnsbury 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 Barnsbury 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 Barnsbury

Can an extension builder in Barnsbury help with planning permission?

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

Many Barnsbury 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 Barnsbury help with materials and finishes?

Yes, most extension builders in Barnsbury 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.