Extension Builders in Mayfair

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (19 reviews)

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Some of our top rated extension builders in Mayfair

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Alan Lancaster Ltd
Rating: 5 out of 5
Extension Builder in Mayfair
Alan Lancaster Ltd is a professional painting and decorating company dedicated to delivering high-quality finishes and exceptional service across residential and commercial projects. Based in North London, we have built a reputation for reliability, craftsmanship, and attention to detail. Our team comprises skilled tradespeople with years of experience, allowing us to offer a full suite of home improvement and refurbishment services beyond painting and decorating. Whether it's a fresh coat of paint or a complete property renovation, we handle every project with precision and professionalism.
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Latest review:
Restoration & Refurbishment- 18 May 2026
William and his team did a great job of redecorating our 4 bed period property inside and out. William gave a detailed quote which enabled us to select or deselect some items and know the relevant cost. There were some minor snags that required extra plastering and repointing all handled with ease and no fuss. The communications were good and the team were hard working and courteous. I would not hesitate to use William again.
Robert Krysta
Rating: 5 out of 5
Extension Builder in Mayfair
I started trading in 2004 as bathroom and kitchen fitter. Since then I've done many projects, those large and really small. All jobs were finished with great attention to details, satisfaction and great appreciation of all my clients.
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Latest review:
Bathroom Fitting- 1 Nov 2024
Absolute expert at his craft and pleasure to work with. Thank you 👍
edildue
Rating: 5 out of 5
Extension Builder in Mayfair
Groundworks, Fromwork, steel fixing, casting , general builders, carpentery , tiles , concrete , wood floor
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Latest review:
Handyman- 6 Nov 2023
Michele and his team did an excellent job of improving the external area of our property. Very professional communication, job was done to a high standard at a fair price. Done in a very timely manner and would highly recommend.
Onyx Services Limited
Rating: 5 out of 5
Extension Builder in Mayfair
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.
Til construction LTD
Rating: 5 out of 5
Extension Builder in Mayfair
TIL Construction LTD is a well-establish company that provides a complete and cost-effective solution for your building needs. We pride ourselves on a team of highly skilled craftsmen and professionals ready to deliver any sized construction project from start to finish. Whether it’s a new build, extension, loft conversion, or renovation, we can help with a portfolio of building work across London and other cities within the UK.
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Latest review:
Carpentry- 5 Aug 2023
A gréât expérience. Thé team were very professional, well priced, and did a great job. They left our apartment immaculately clean and fixed all issues we had. They were extremely polite and responsive and did a great job in the timeframe and for the quoted cost. Highly recommend
AVStructures
Rating: 5 out of 5
Extension Builder in Mayfair
A.V. Structures is a construction company working with top-rated contractors and providing services to private clients around London. Our highly experienced team of builders has excellent skills and knowledge gained delivering projects locally and abroad. We approach each building process following Environmental, Health, and Safety guidelines. All our quotes are free, and we will always try to get a quote to you within a week of us visiting your property.
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Latest review:
Demolition- 24 Nov 2021
We employed A.V Structures for the building of an external wall around our property, the removal of a garage and the installation of railings and gates. Throughout the 4 week programme we could not have been happier with their work. Arrival was prompt, their pace of work displayed energy and purpose. They were mindful of us and our neighbours and made sure the area was left clean and tidy at the end of each days work.in addition the workmen were courteous and kept us fully informed. Alex, the owner of the company, kept in close contact with us to assure himself of our satisfaction. He came on site at intervals to check that all was going according to plan. We therefore felt completely confident that quality and outcomes were important to him. Employing A.V Structures was a decision we were pleased to have made. We would use them again without hesitation and recommend them highly to anyone considering similar work.
Carpenter quality
Rating: 5 out of 5
Extension Builder in Mayfair
I’ve worked as a carpenter for 12 years I’ve worked on many projects in central London and around London borough for 5 years I’ve worked for wates / Westminster council andproject 9 ltd and for 7 years I worked self employed my priority always have been quality job and clients to be satisfied thank you
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Latest review:
Carpentry- 29 May 2026
Excellent work. So happy with the new door! Thank you so much!
Garey Limited
Rating: 5 out of 5
Extension Builder in Mayfair
General building
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Latest review:
Very reliable and high quality of work.
Exquisite Design & Build Ltd
Rating: 5 out of 5
Extension Builder in Mayfair
Welcome to Exquisite Design & Build, a premier construction company based in London. We specialise in delivering exceptional construction work and Architectural & Structural Design services to both Commercial & Residential Clients. Our comprehensive offerings include the full range of Building & Refurbishment Works, Planning Applications, 2D & 3D Design and Visualisations, Structural Design, Project Management and detailed Estimates. “Exquisite” - carries the implication that every detail of our work, is of rare and appealing excellence. We transform your vision into reality with precision and professionalism, ensuring a seamless and satisfying experience from concept to completion. Our company is TRUSTMARK registered company, a Government-endorsed sign of consumer protection for home improvements, repairs, renewable energy installations and low energy retrofits. We are also member of the FEDERATION OF MASTER BUILDERS.
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Latest review:
Exquisite Design and Build recently reworked and refurbished our new, six bedroom detached house, having previously completed a kitchen extension at our last property. Andrei’s work is of an incredibly high standard. He shows great attention to detail throughout the entire process. Not only does he execute the work beautifully, but he offers great design ideas and and suggestions. With regard to contracting, pricing and invoicing, Andrei provides clear and accurate documentation which gives us complete trust in his ability to work within our budget. Andrei and his team are an absolute pleasure to work with; hardworking, punctual and tidy. I have recommended them to three other friends, all of whom chose to work with him on their extension/refurbishment projects and were equally delighted with the results. I would not hesitate to recommend Exquisite Design and Build to anyone, regardless of the size and complexity of their project.
Ed’s loft conversions Ltd
Rating: 5 out of 5
Extension Builder in Mayfair
We specialise in loft conversions, Extension to a complete house refurbishment.
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Latest review:
I engaged Edi to work on a full renovation and refurbishment of a 4 bedroom detached house with front and back gardens on Blackheath’s Cator Estate. Edi did an extensive amount of work, including stripping out; plumbing; plastering; windows installation; carpentry; and decoration. In addition, after commencing the property work, once the scaffold had been erected, following sensible advice, Edi and his team replaced the roof and fully insulated the attic; fitted additional electric points; rebuilt the garden patio; and replaced the flooring throughout, in addition to other important jobs including re rendering and pointing of chimneys, building new wardrobes in the main bedrooms; and upgrading the radiators. A new kitchen, and two new bathrooms have been fitted. The kitchen redesign meant knocking through a wall with the lounge to create a larger space. Edi is a highly skilled craftsman, who thinks creatively as he works to make best use of the space, including shelf fittings, and additional lighting for example. He has built some beautiful wardrobes, and the internal decorations have brightened up what was previously a rather shabby looking house. In addition to the above, I wish to commend Edi for his professionalism, courtesy, and passion for doing the best work possible. On all the site visits I attended, and every time I spoke with him on the phone, it was striking how much he cared about the work that he was doing, his desire to ensure that the house would look the best. I always left site visits with the feeling that he cared so much about the house that he could be safely relied on to give the best advice to enable us to make the right decisions. I also noticed that Edi and his team would take the upmost care to keep the property safe, tidy and in good shape throughout the project. He can be fully trusted to look after any site he works on. He is intelligent and careful when it comes to safety and security. It has been a pleasure for Edi and his team to work with us over a period of around 6 months, and he did so much to reduce the stress of a significant project so that we could always rely on him to work methodically, patiently and sensibly, and to make best use of the resources available. His pleasantness shines through, and everyone I know who has spoken to him has always provided me with the most positive feedback I have no hesitation in recommending Edi to anyone who wishes to engage him for future projects, and is most deserving of the good words that I and others that work with him have to say about him.
Perfectloft
Rating: 5 out of 5
Extension Builder in Mayfair
Converting your loft into a beautiful living space may seem like a daunting task, but the results are always going to be worth the painstaking process. The loft conversion procedure does not have to be that difficult; all you require is to hire right people to do the right job.
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Latest review:
Kitchen Fitting- 4 Nov 2019
Bogdan and Marius were great. They constantly kept us updated with progress and came up with good solutions to any issues they encountered, checking we were OK with them before progressing. They were on time, efficient, helpful and tidied up after themselves. I would definitely recommend them.
House Refurb
Rating: 4.9 out of 5
Extension Builder in Mayfair
We have built our livelihoods on remodelling people’s homes, increasing their size and value. From the simple to the lavish, no matter how big or small, we’ve experienced it all and we can help you every step of the way offering a comprehensive service and take care of all aspects of your project, from initial plans through to full completion. Our skilled workforce of reliable professionals is on duty to offer you quality building work, competitive prices and exceptional customer service.
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Latest review:
Extensions- 24 Feb 2014
Narcis and his team listened carefully to my specifications and completed the job with an excellent finish. Throughout they were courteous and hard working. Highly recommended .
Complete Construction london
Rating: 5 out of 5
Extension Builder in Mayfair
At Complete Construction we have a complete team to undertake all building and renovation works.We have been trading over 12 years,and forever growing.Priding ourselves on reputation and reviews and can offer plenty of references from recent clients.Having been known to have the team you want on your project,we are now being prided on our unbelievable Painting and decorating team
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Latest review:
Restoration & Refurbishment- 16 Jun 2023
Amazing job by Ross and his team! They're easy to deal with and the job was completed on time and to budget :) Will definitely use again! Thank you so much!
Independent Building Services Ltd
Rating: 5 out of 5
Extension Builder in Mayfair
We are an experienced construction company based in west acton. Quality work and reasonable prices, building maintenance, full renovation, extensions and loft conversions, design and advise plus much more . We will beat any prices and 100% customer satisfaction guaranteed.
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Latest review:
Extensions- 9 Feb 2019
I had the pleasure of working with Habib on the renovation of my house. My review of his work during renovation: 1- He has done excellent job in rewiring the house. he segmented each floor and kitchen and put them on separate ring, he expanded consumer box for future growth as well as installing wired smoke and security alarms 2,3 - He fitted pipe and installed unvented cylinder system with water softener perfectly including multiple heating control zones which I can control each floor individually (I love it). 4- he built a beautiful and prefect extension in garden, he considered all building regulations such as structural integrity, fire safety, energy efficiency, damp proofing, ventilation and other key aspects that ensure a building is safe. In addition to above he has very good personality and he is approachable to discuss changes or add new tasks to job (unlike some builders whom don’t like it). Throughout the course of the renovation, Habib was a consummate professional. He was accurate in his initial assessment of the scale and cost of my project. Good work takes time to complete. Patience is required when you work with a perfectionist. Although my project took time to complete, I have a wonderful outcome and a work of art now. I can recommend him highly and without reservation. Thank you, Habib, At the end I would like to thank Jake for his part and hard-working during renovation of my house. Hamid
Estate Renovation (Al Huda Corporation Ltd)
Rating: 5 out of 5
Extension Builder in Mayfair
Estate Renovation provides substantial building maintenance and development services, which include but are not limited to: kitchen & bathroom renovation, property refurbishment, extension, conversion, paint & decoration, electrical and plumbing services. Our main purpose is to provide your home with safety, comfort and beauty. We are prepared to face any challenges and always strive to achieve continual improvement of our values and standards during projects.
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Latest review:
Bathroom Fitting- 30 May 2022
Mohammed Huda and his builder were professional and quick to attend our job –– recommend! The communication was fast and professional. Mohammed provided a detailed quote (our job had to go through insurance) that is fair and transparent. The builder who came around, Jafa, was very respectful to our things. We were able to trust him from the get-go and had a peace of mind when he was working. He works incredibly hard and is methodical in his process (e.g. painting ceiling first, then walls, so to avoid splatter unevenness). They responded to our requests quickly and fixed things we weren't 100% happy with. The team finished the job ahead of time, and gave us tips for refurbishing in the future. Very happy and highly recommend!
MAF Contacts
Rating: 5 out of 5
Extension Builder in Mayfair
Hello, My name is Dan Maftei, Founder of MAF Contracts ltd. MAF offers a range of services like demolition( stripping out), Plumbing, Electric, Rendering and Plastering, Painting and decorating, Tiling, Flooring, Carpentry first fix and second fix, Paving, Roofing, extension and Loft conversion. We can deal with big projects as well as small ones. Thank you, Dan Maftei
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Latest review:
Restoration & Refurbishment- 29 Dec 2018
Amazing work. A job very well done. Very hardworking people and high quality work. All was delivered exactly as agreed in time and to perfection. Thank you again for transforming my flat in such a lovely space.

4.2

Top rated Extension Builders

Our Extension Builders in Mayfair, are rated 4.2 out of 5 based on 19 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Mayfair?

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

Find extension builders in Mayfair with MyBuilder

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

Step 2: Compare different extension builders in Mayfair

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

Step 3: Hire Mayfair extension builders with confidence

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

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

What to ask a Mayfair extension builder before hiring?

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

An extension builder in Mayfair 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 Mayfair 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 Mayfair?

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 Mayfair 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 Mayfair 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 Mayfair

Can an extension builder in Mayfair help with planning permission?

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

Many Mayfair 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 Mayfair help with materials and finishes?

Yes, most extension builders in Mayfair 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.