Extension Builders in Mayfair

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 Mayfair

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Ridgewell Roofing and Building Ltd
Rating: 5 out of 5
Extension Builder in Mayfair
Ridgewell roofing and building ltd is a family owned and run business, we strive for perfection in the quality of our work , competitive pricing and customer satisfaction , no job is too big or too small , we do all types of roofing , from flat roofs in felt rubber fibreglass, pitched roofs repointing leadwork valleys and general maintenance feel free to get in touch
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Latest review:
Plastering- 4 Aug 2026
James was easy to speak to and took the time to answer all of my questions while we finalised the scope of work and contract. His quotation was fair and competitive. The work included replacing the felt on the side extension and dormer flat roofs, as well as applying a silicone render to our Mock Tudor house, all of which was completed to a very high standard. The roof tile repointing, valley leadwork, fascia and gutter repairs were carried out thoroughly, and the roof now looks neat and tidy. A few small items that had been missed from the original contract, but James was happy to take care of them without any issues. James was professional, courteous, and reliable throughout, providing a hassle-free experience from start to finish. His team did an excellent job, kept the site clean and tidy, and completed the work with great attention to detail. I would be more than happy to recommend Ridgewell Roofing & Building Ltd. to anyone looking for high-quality roofing & rendering work.
Guardian Angels Property Ltd.
No reviews yet
Extension Builder in Mayfair
Property development company. All types of brickwork and blockwork. Painting and decorating. Refurb and renovations. No job too big. Diligent, honest & hardworking.
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H&M Construction
Rating: 5 out of 5
Extension Builder in Mayfair
We do carpentry and roofing works. We present our work professionally. We strive to please the customer. We have experience over the years. Our prices compete with everyone. Our headquarters is in London
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Latest review:
Carpentry- 27 Mar 2022
We were very happy with Hesham’s work on a tricky job mending our Victorian window shutters.
Bathroom Renovation
Rating: 5 out of 5
Extension Builder in Mayfair
Im a multi trader and have a wealth of experience in construction on large projects and sites. We do bathrooms, kitchens, plastering, flooring, general renovations and extensions. We ensure we exceed clients expectations go above and beyond and work with a high standard and quality.
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Latest review:
Plastering- 8 Jun 2026
We were thoroughly pleased with Bathroom Renovation, Bahram and the services provided. We required stud walls throughout our apartment, ceiling replacement and ducting/pipework concealing. I can only say that Bahram and his communications have been a breath of fresh air. The team are efficient, friendly and get the job done - most importantly Bahram takes pride in the work his team complete. Our job was relatively urgent and Bahram offered what I feel was a fair price, remained communicative and had his team readily available to get the job completed within the timeframe. Most importantly, as with it seems all building works, jobs can grow slightly, but Bahram’s considered approach and advice was invaluable. We increased the scope of our works mid-job, and are really pleased with the results. Fair pricing, someone who has pride in their work, and a job well done.
Otters Group Ltd
Rating: 5 out of 5
Extension Builder in Mayfair
Welcome to Otters Group Ltd page, With over 20 years of experience in the construction industry, we deliver high-quality construction solutions for both residential and commercial projects. From start to finish, we manage every aspect of construction with professionalism, precision, and care. Our team of skilled, reliable, and dedicated professionals is committed to exceeding expectations by delivering projects on time, within budget, and to the highest standards of quality. Customer satisfaction is at the heart of everything we do. We work closely with our clients throughout the construction process, upon completion, and during the defect liability period to ensure long-lasting results and peace of mind. **Your time, cost, and quality are our priority on every project.**
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Latest review:
Painting & Decorating- 19 Jun 2024
I recently had the pleasure of working with Mahdi and his team, and they were excellent. They were knowledgeable, did the work efficiently, and cleaned up thoroughly afterward. I was extremely satisfied with the quality of their work. I would highly recommend them and look forward to working with them again in the future.
Alban's A Team Solution
Rating: 5 out of 5
Extension Builder in Mayfair
Hi my name is Alban I am a builder. I am honest and hardworking person. I have 18 years experience on general building trade. I undertake all building work, new build houses, new extensions, loft conversion. We also do all refurbishment interior and exterior. All structure and good knowledge of architectural plans.
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Latest review:
Carpentry- 20 Oct 2017
nice guy, good comms, very good cartentry
I.V.M BUILDERS
Rating: 5 out of 5
Extension Builder in Mayfair
I.V.M Builders Limited. Established in Stratford, we have worked in the building trade for many years, I.V.M Builders Ltd are a reliable, fully accredited and professional company operating in East London and North London. We are prideful in all the work which we undertake, taking great care to make sure that our client’s needs are met meticulously and professionally. All of our builders are qualified to undertake the task at hand, and we operate to all governed standards.
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Latest review:
Kitchen Fitting- 18 Nov 2023
The kitchen refurbishment exceeded my expectations! The attention to detail, modern design, Thank you for your expertise and professionalism throughout the process. I couldn't be happier with the results!
Peter Build
Rating: 5 out of 5
Extension Builder in Mayfair
We offer professional service for all your local building requirements. With our team of professionals no job is too small or too big to handle. From Small Brickwork jobs to large extension work, we can do it. Our team of professionals have years of experience and know-how to carry out all jobs to the highest quality without charging extortionate prices.We are a small friendly local Builders with over 20 years experience!
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Latest review:
Bathroom Fitting- 5 Nov 2019
I met up with Peter, told him what needed doing and he provided a detailed quote within days. I handed over a set off keys and basically left him and his team to get on with it! This was a time restricted job, he purchased all the material and provided all the receipts. I returned a week later to find the job completed to the highest standard surpassing my expectations. I will definitely be working with Peter again in the future and I would highly recommend him.
IDEAL Carpenters LTD
Rating: 5 out of 5
Extension Builder in Mayfair
Hello I am a skilled carpenter, with over 23 years experience working in and around London, I can undertake most all jobs concerning building works around the Home but also have a team of reliable sub trades including “Gas Safe engineers” and qualified electricians, If you need any work done, by some one you can trust and rely on then please don’t hesitate to short list me, for your next project, Regards Agron
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Latest review:
Conversions - General- 28 Jun 2026
We recently had our detached single garage converted into a fully usable room by Agron and his team, and we couldn't be happier with the result. The project involved replacing the garage door with matching brickwork, raising the roof, installing new windows and a door, insulating the garage, plaster boarding and skimming throughout, and rendering and painting the exterior. The work was completed to an exceptionally high standard. Agron and his team were fantastic from start to finish. They were incredibly friendly, professional and hardworking, completing the project quickly without ever compromising on quality. Communication was excellent throughout, they kept us updated on progress and always made sure we were happy with how the project was proceeding. They were also very accommodating and happy to adapt to any requests or changes we made along the way, making the whole process stress free. The attention to detail and pride they took in their work really shows in the finished result.
ARPconstruction
Rating: 5 out of 5
Extension Builder in Mayfair
New on My builder not in bussines. Hello I am Alex, after 13 years working on the construction site 4 years ago i opened my own building company.At the moment I have 12 workers within these 12 works we cover a wide variaty of highley skilled services.I am the director of EvoBuild, and i will be responsible for the work that is carried out.We work monday to sunday to get the job done to a high standard.I will come out and discuss the job in person and endever to answer any questions you may have
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Latest review:
Handyman- 23 Mar 2022
Alex and his crew did a fantastic job on my property. They did the work on-time, to budget and to a very professional standard. The work required a wide variety of skills from painting, carpentry, plumbing and electrics. As I was unable to be on site Alex constantly kept me updated on progress with photos and videos. All in all I would highly recommend Alex and his team.
D Building Ltd
Rating: 5 out of 5
Extension Builder in Mayfair
D Building Ltd is a leader in Brickwork, Rendering and Plastering services. With more than 17 years of experience we offer the highest quality decorating, renovation and refurbishment services to domestic and commercial properties throughout Greater London
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Latest review:
Plastering- 21 Jun 2026
I spoke over the phone with David and hired him - even before he had actually seen the job - because he sounded honest and sensible. He came exactly on time and did everything that we discussed in a really friendly and professional way. The work was really good. I'd recommend D Building to anybody.
Anjelina
Rating: 5 out of 5
Extension Builder in Mayfair
Hello, my name is Krasimir Dimitrov i am a tradesman, i deal with loft conversions, demolitions, new builds, extensions. I have been in the trade for over 10 years.
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Latest review:
Demolition- 17 May 2025
The team was great They did everything as they promised The job was finished on time Thanks for the help, it was much appreciated.
Restora Developments LTD
Rating: 5 out of 5
Extension Builder in Mayfair
Hi! Here at Restora Developments we pride ourselves in having a diverse range of skills. Our bread and butter is new build homes and large developments, however we have formed a sub division aimed at end clients and home owners for smaller taks. With all in house; - carpenters - roofers - plumbers - electricians - brick layers - landscapers Etc. We take on all work from simple bathroom refurbishments to building your dream property from the ground up!
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Latest review:
Groundwork & Foundations- 18 Feb 2022
they did for me a good job and very high standard and price wise
Capital Loft Conversions Ltd
No reviews yet
Extension Builder in Mayfair
Our company specializing in high-end residential construction, property refurbishments, designing and installation of high-quality custom loft conversions and house extensions across London and the M25. While offering a personalised service, we bring the skills and experience required to ensure your loft conversion is completed to the highest standard and agreed timeline. Whether you are looking to add value to your property or create more space, our team will handle everything from planning permission to architectural design and construction. Use our experience and free initial consultation to understand the value we can add to your home.
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Andros Construction Ltd
Rating: 5 out of 5
Extension Builder in Mayfair
Dear customers- Andros construction LTD with 30 years experience, our team can do everything thats related to buildings, extensions, loft conversions, full refurbishment, painting, plumbing, kitchen fitting, plaster, carpenter, plasterboard, tiles , electrical jobs , we use high quality products to repair or build anything.We are constantly available for to complete any requirements that you have . All jobs big or small welcome, for free quotes and advice don't hesitate to contact us. My company wishes you have a great day.!
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Latest review:
Painting & Decorating- 22 Oct 2019
Fabulous team and were on time every morning. Their work was fast and efficient, Andros guided me along the way and has gone the extra mile to help me. I will be using Andros again around Xmas time. Ive seen a lot of builders last week, I made the right decision to go with him and his team. Thanks Andros.
OM & SKY Limited
Rating: 5 out of 5
Extension Builder in Mayfair
With over 18 years of diverse expertise in the realm of multi-trading, encompassing both domestic and commercial sectors, we take pride in offering comprehensive services for full-scale renovations. Our proficiency spans across a spectrum of disciplines including kitchen and bathroom installations, interior decorating, painting, flooring solutions, carpentry, as well as plumbing and electrical works. At our company, we are committed to delivering high-quality, professional, and reliable services that prioritize the satisfaction and contentment of our clients. We stand behind the excellence of our work and provide a generous 2-year warranty as a testament to our dedication to delivering lasting quality. Moreover, we are dedicated to collaborating with our clients, offering guidance and support to bring their ideas to life. Ensuring accessibility and readiness to assist at any hour, our 24/7 contact line is at your service, ready to address any queries or concerns. We are also proud to hold certification from the BIKBBI (British Institute of Kitchen Bedroom and Bathroom Installers), signifying our commitment to upholding industry standards and best practices. We eagerly anticipate the opportunity to exceed your expectations and bring your visions to fruition.
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Latest review:
Bathroom Fitting- 20 Jun 2026
Excellent, the result is very elevated. Very happy, highly recommended!

4.2

Top rated Extension Builders

Our Extension Builders in Mayfair, 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 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.