Extension Builders in London | MyBuilder

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Some of our top rated extension builders in London

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Tawfik Werfalli
Rating: 5 out of 5
Extension Builder in London
At Miko Construction, we specialise in high-quality residential refurbishments, extensions, and fit-outs. We’re a small, experienced team that takes pride in delivering well-crafted work with clear communication throughout. Whether it’s a full home renovation or a bespoke interior project, we bring a personal, hands-on approach from start to finish.
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Latest review:
Tawfik’s team was very professional and very knowledgeable, they done a great work including helping me with the design and understanding the process required to complete a project at this size, he completed the electrical work tested it and also included great ideas with the LED lights that made A beautiful design at the end, he also recommended a lot of subcontractors in the area are very competitive in their price and practically manage the project with me from inception to completion.
Sebek Construction Ltd
Rating: 5 out of 5
Extension Builder in London
Sebek construction family run business for the last 20 years. High quality refurbishment specialits. Kitchens, bathrooms, loft conversion and extension. all work comes complete with public liability insurance.
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Latest review:
We have been working with Derek Borkiewicz (Sebek Construction) on a renovation of a garden flat in Little Venice since last autumn. We needed to completely restore the whole flat, including the garden. This was our second renovation project and by this time we knew what we wanted to do, which mistakes to avoid and what to pretend from a qualified builder. We will never stop saying how lucky we have been to find Derek and his team! Derek is not only a professional builder who is very careful to the smallest of the details. He is not only a very good project manager who is constantly checking the work of his men. Derek is a friend who takes on board a project like it is his own project. He suggested the most convenient and best solutions for any problem we came across during the works. There wasn’t a time when he didn’t know what to do to solve a difficult situation (and there are lots of small and big issues coming up in a renovation work) no matter how complicate they were and how long it took to solve them. His availability and his courtesy are incredible above all in a fast running city like London. This is priceless to us. His hard work can be seen in the wonderful result we reached with this garden flat. If we ever decide to work on another project we won’t think twice about working with Derek once again. In fact, now that we found the perfect man to work with, we are looking forward to finding another renovation project to work on! Monica
AVmen
Rating: 5 out of 5
Extension Builder in London
We are AVmen Construction We provide a range of Design and Build services to Luxury Commercial & High-End Residential properties in a professionally estimated, planned, and controlled manner: Bathroom Design, Reconfiguration, Refurbishment/Renovation 2D/3D CAD drawings and services for complex refurbishments Extensions, Conversions, Modernisation from the scratch Kitchen Extensions and Complete Kitchen renovations Building Shell & Core, Mechanical, and Electrical Services.
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Latest review:
Carpentry- 7 Sep 2020
Amiran delivered an excellent job. The sauna was supplied devoid of full clear instructions and materials and Amiran was able to solve all the issues in a timely and satisfactory manner. Very good workmanship, attention to detail and create problem solving. Would hire again.
Onyx Services Limited
Rating: 5 out of 5
Extension Builder in London
Onyx services Ltd which is part of the Wigwam construction Group has been in the home improvements business for many years. All engineers are Gas safe and NIEIC registered. We undertake all types of building, construction, plastering, painting as well as heating, plumbing & electrical installations. Onyx has £5 million public liability insurance. All work comes with written garuantee. All major debit/credit cards accepted.
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Latest review:
Extensions- 13 Feb 2025
Shami and his team had been fantastic from start to finish! Before hiring his team he showed me around a house his team built, which was amazing to see. His communication was excellent throughout the progress of my renovation and very reassuring. Even as I had made changes to the build, he was very helpful in planning and adjusting to my needs. His team had built a single floor rear extension, including a new kitchen, bathroom suite, full electric rewire and plumbing from scratch. Also, comparing his team with six other builders, he had one of the most competitive quotes for the build. Post finishing the job, any issues I had were resolved immediately putting me at ease! I would definitely hire Shami and his team for any future jobs.
RQ Brickwork
Rating: 5 out of 5
Extension Builder in London
bricklayer, undertake new builds, extensions ,garden walls stone work and repointing
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Latest review:
Bricklaying- 21 Jul 2025
Really nice guy to deal with. Job was done on time, looks good. I will definitely work with him again and would recommend.
Fornes Limited
Rating: 5 out of 5
Extension Builder in London
No matter what size your requirements are, we provide a complete project management and a full turnkey service from simple kitchen or bathroom make up to more complex projects and skilled finishes like Mediterranean style. No hidden costs and all jobs guaranteed. We speak English and Spanish.
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Latest review:
I've used Facundo's team to install a new shower, including wall and floor tiling, massage jets, and concealed shower equipment. Facundo was the person we dealt with at all times, although someone else was assigned to do the job. The quality of the work and finish is extremely good. I was also impressed with Facundo's professional attitude at all times, being very polite and respectful, as well as proactive in addressing any potential issues affecting our planning and execution. Highly recommended.
Velvet Construction
Rating: 5 out of 5
Extension Builder in London
About Velvet Construction: 5+ year experience in the building trade. CSCS Black Card Holder All health and safety certificates. Velvet Construction has a large team of qualified tradesmen, delivering a high standard of workmanship at a competitive price. For more information on our services please contact us. We offer free quotations and all work is insured and guaranteed.
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Latest review:
Restoration & Refurbishment- 10 May 2019
Velvet Construction are a friendly and professional contractor who work hard to deliver an excellent service. We have worked closely with them and their practical and dynamic approach is refreshing to work with in a professional capacity and we would highly recommend them. Their quality of workmanship is excellent which is largely driven by their own high standards which they monitor closely and consistently. They are organised and communication is always great. A big thank you to the whole team and Specially Negedet being a joy to work with . Highly recommend him and his hard work time. Thank you
Gjon
Rating: 4 out of 5
Extension Builder in London
I have been in the construction industry for over 25years Pimlico 📍
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Latest review:
Tiling- 24 Mar 2022
Gjon and his son Julian did an amazing job tiling our kitchen floor. They were prompt in communications and completed the job within the agreed time. Left the job clean and tidy after themselves. Will probably hire them again to install a splashback later on in the project.
Prestige Building Design Ltd
Rating: 5 out of 5
Extension Builder in London
My name is Warren & has been in the building industry for over 35yrs Began as a carpenter and has developed & moved into all area and aspect of the building industry covering from the least to the greatest, Prestige Building Design Ltd. Are a team of Multi-Skill tradesman, Crafts man & builders which will converts your ideas into reality. Our portfolio covers New build,Extension,Loft Conversions,Renovations,Bathrooms,Kitchens, We pride our self on our ability to deliver & Customer satisfaction
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Latest review:
Extensions- 24 Apr 2023
Warren and his team have been with us for over a year now, first building our extension and then retained for additional work around the house. The quality of work is high, the pricing is very competitive and the team are a pleasure to have around. I am pleased we hired Warren and do not hesitate to recommend him.
Craft of London Ltd
Rating: 5 out of 5
Extension Builder in London
Craft of London are an established building company, specialising in design and build projects, creating bespoke interiors and homes. Our workmanship is of the best standard in London for either small, medium or grand designs.
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Latest review:
Extensions- 3 Sep 2013
Kel and his team worked on my single storey extension with bifold doors and glass roof. He also did some landscaping in my garden, replacing the fencing and installing a raised patio with cedar battens to the side. Overall I was very pleased with the work Kel did. He is a good communicator and frequently visited the site to keep on top of the work. Kel was happy to discuss requests and was flexible with design changes. The bulk of the work was completed on time with just some minor snags remaining, but the finish is excellent. It's been a long and stressful journey, but it's been easier with the friendly support and professional approach Kel has taken to his job. I'd be happy to recommend Craft of London and provide a reference on request.
Pops Building Services Ltd
Rating: 5 out of 5
Extension Builder in London
I am a city and guilds advanced craft qualified carpenter/joiner With over 30 years experience in the construction industry. I was the director of a property development company. I’ve managed contracts for NHS trusts as well as private contractors. The types of work I normally undertake are loft conversions, extensions, renovations, kitchen and bathroom installations
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Latest review:
Peter was the on-site foreman on our complete house renovation, which took just over a year. This included an additional ensuite pod bedroom in the roof and a side-return and extension to the kitchen. Peter was totally reliable throughout the project and thoroughly professional. Throughout this time we were living in the house with the children. He was always on time, managed the on-site team well and communicated clearly with us. His workmanship is high quality and he was also a stickler for checking the work of others and getting it updated if it wasn’t up to scratch. I have no hesitation in recommending Peter.
Swift Building Masters
Rating: 4.9 out of 5
Extension Builder in London
General Builder of over 40 years Experience. Carpentry & Joinery Background. I have worked on large and small Projects, Repair, Refurbishment, Extensions, Loft conversions and New-builds. Recently become a member of Federation of Master Builders. ALL WORK QUALITY ASSURED
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Latest review:
Extensions- 5 Nov 2016
Leslie carried out the following works: chemical damp injection to walls on rear extension, reroute down-pipe, repair fracture on rear wall, install gutter hedgehog. Hopefully, this will resolve some of the issues we had with damp, a blocked down-pipe and an overflowing gutter. Leslie arrived on time on the first day but was delayed a few hours the next day. However, the work still was done within two days as expected. Thank you!
DK Home Refurbishment
Rating: 5 out of 5
Extension Builder in London
Turn your property into the home you’ve always wanted — with DK Home Refurbishment Ltd. With over 25 years of experience, we specialise in loft conversions, house extensions, basements, full refurbishments, and property maintenance across London. We provide a complete end-to-end service, including: ✔ Architectural design & planning support ✔ Council applications & approvals ✔ Structural engineering ✔ Building control compliance ✔ High-quality finishes and attention to detail We take pride in reliable workmanship, clear communication, and high standards on every project — from concept to completion. 📩 Message us today to discuss your project and get a free quote. #LoftConversion #HouseExtension #FullRefurbishment #PropertyMaintenance #LondonRefurbishment
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Latest review:
Joinery & Cabinet Making- 13 Apr 2015
Daniel was excellent, incredibly friendly and happy to talk through various solutions for our problem and also helped with an unrelated issue we had. Can't recommend highly enough, thanks Daniel
Gesti
Rating: 5 out of 5
Extension Builder in London
Hi, At GESTI RENOVATIONS we specialise in all types of building works, from small repairs to full renovations, loft conversions & extensions. Get in touch for a free no obligation quote.
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Latest review:
Plastering- 14 Nov 2024
Very happy with the work Gesti did for us. We just brought our first home and the ceiling honestly wasn’t looking the best. Lots of cracks and slightly warping. Gesti was able to come in and secure all the cracks and plaster the entire ceiling for us. He did an amazing job. Will use him again I highly recommend. !!
JDS Maintenance
Rating: 5 out of 5
Extension Builder in London
Hi there, I am a Handyman, I got recomendations for my customers. Thanks a lot.
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Latest review:
Kitchen Fitting- 4 Apr 2025
Super professional, job completed properly. He is extremely knowledgable Would reccomend
REALTOP LTD
Rating: 5 out of 5
Extension Builder in London
Good morning, Realtop Ltd provides commercial and domestic full refurbishment services, helping clients bring their dream spaces to life through our experienced and professional team. Our services include painting and decorating, interior design support, bespoke fitted solutions, flooring installation, white walling, composite and hygienic cladding, door installation, and general refurbishment works. Please note that being shortlisted causes us to pay a lead fee, so kindly shortlist us only if the estimated cost I have offered is suitable for your budget.
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Latest review:
Hard Flooring- 21 Jun 2025
Brilliant job done by Vincento . Right from the first visit to the job completion very professional and done the job rightly . Will definitely recommend. Five stars.