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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Paul Stevens
No reviews yet
Extension Builder in Mayfair
Friendly, reliable and professional service. All brickwork undertaken. No job too small
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A & A Build and Design
No reviews yet
Extension Builder in Mayfair
Refurbishment, Extensions, New build, Design and Maintenance of any domestic building project.
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Malling Masonry
Rating: 5 out of 5
Extension Builder in Mayfair
Hello there. My names is Marc Howard from Peerless construction. We have many years experience on the construction industry and undertake projects from extensions to complete new builds. We pride ourselves on professionalism and a high standards. We can supply reviews and references upon request. Kind Regards Marc Howard
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Latest review:
Stonemasonry- 5 Oct 2020
Did a great job. Came on time - work completed efficiently- very pleased with the result. Neal
Wooburn Project Management Ltd
Rating: 5 out of 5
Extension Builder in Mayfair
Our company is family owned and we work on all property types from small extensions to building new homes and refurbishments containing multiple units, we employ most of our people directly and have built a family atmosphere giving us more control on the program and our main subcontractors have worked with us for many years .
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Latest review:
Extensions- 1 Sep 2021
I have nothing but praise for Michael and his team. The project was managed exceptionally well and Michael kept us apprised of progress, emerging issues (which were dealt with quickly and with some innovative thinking) and he was honest and candid with our choice of kitchen tile (I think his words were do you want to rethink that colour!). Michael quoted in Nov and started work in the Spring (late Mar) and held his price despite a national increase in the price of materials and reduced availability which he managed admirably. Obviously a man with a good eye; his suggestions for additional works were inspired and they have resulted in a high quality finish. Finally, it is worth mentioning the team who did the grafting! Very industrious, skilled, polite and helpful. Highly recommend Wooburn PM to anyone considering building work. :-)
H M Renovations LTD
No reviews yet
Extension Builder in Mayfair
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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Ground2Sky Limited
Rating: 4.5 out of 5
Extension Builder in Mayfair
Ground2Sky, Incorporated in 2016 has been set up with a mission to provide quality groundworks and general building works with the assurance of the best value for money. Our main aim is to exhibit high standards of quality in our work and successfully delivery projects with utmost customer satisfaction. We are passionate about our work and are looking to build good relationships with our clients.
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Latest review:
Driveways (Paved & Loose)- 6 Jul 2026
Jeromy and his team did a fantastic job on my new driveway. They arrived on time, worked efficiently, and kept everything tidy throughout. The finish is neat, durable, and exactly what we agreed. Great communication, fair pricing, and reliable service. I’d highly recommend Jeromy to anyone looking for a trustworthy builder.
CARVE Engineering Co Ltd
Rating: 1 out of 5
Extension Builder in Mayfair
We undertake large and small construction rebuild projects, house extension and loft conversion, shop design and decoration, home design and decoration, customized furniture. We can provide professional drawing and floor plan as well.
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Latest review:
Extensions- 19 Sep 2022
Man Ho or Calvin Ho' or Man Fu Ho, who owns Carve Engineering Co. Ltd. He also has a Hong Kong branch carve-eng.com . I didn't know he subcontracted the whole project to a group of Chinese mainlanders who couldn't speak English. And he asked a British Gas gas engineer to sign off the plumbing work. I obtained the planning in December 2021. The work started on 31/1/2022 and almost finished now 19/9/2022. It supposed to end in three months time as they promised. It's only a single storey side extension and shouldn't be left unfinished with pipes broke. The workers only came to work once a week and sometimes the work stopped for a month or so. The price included the purchase of a boiler and installation. But there's no timer or thermostat and I was asked to purchase these and install them with extra cost. The workers' van broke down five times and they didn't turn up for five different days. There's no windowsill and they called this a standard window people would install. The exterior wall was painted inconsistent to our original wall and I had to argue to get them pebbledash and repainted. They left the fences on our neighbours. The pipes are still leaking. Shower leaked for 3 months. They even charged extra for the electricity sockets they installed in our kitchen. They took down the mains water supply switch and never install it back so our house has no in house mains water stop valve! They didn't hoover and didn't have a hoover. Avoid this company!
H&S CONSTRUCTION
No reviews yet
Extension Builder in Mayfair
I’m a reliable and hardworking bathroom fitter with experience in installing bathrooms, showers, tiling, and general plumbing work. I take pride in delivering high-quality workmanship and making sure every job is completed to a professional standard. I work across the local area and am happy to travel for the right job. My services include bathroom installations, shower trays, tiling, silicone sealing, pipework adjustments, and general bathroom repairs. I focus on clear communication, keeping the workspace tidy, and making sure customers are happy with the finished result. Whether it’s a full bathroom renovation or a small repair, I aim to provide a reliable, honest, and efficient service.
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Gww construction
No reviews yet
Extension Builder in Mayfair
I am a highly skilled carpenter joiner , with the vision to give the very best of work from myself . Whether it be from fitting wood floors to hanging doors . -fit hand made bespoke wardrobes. -Pitch roofs from plans ,or to certain design -hand craft gazebos to any design and style, and have the resources to supply the timber needed . - I have designed and built every project from star to finish, according to each customers style and taste .
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Square Build Ltd
Rating: 5 out of 5
Extension Builder in Mayfair
We're general building contractors, working on anything from everyday household projects which include general household repairs, painting and decorating, bathroom/kitchen renovations, property extensions and garden work projects. Although we are new to My Builder, we’ve had nearly 20 years experience completing many successful projects. We’re an established registered company which has been trading for several years.
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Latest review:
Waste Clearance- 28 Jun 2019
Fine. Arrived promptly as requested.
chris
No reviews yet
Extension Builder in Mayfair
Electrical installation, Landlord certificate, EICR, Condition report , Fault finding etc
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Escape Home and Garden
No reviews yet
Extension Builder in Mayfair
Escape is new to my MY Builder, we are a General Builder and Handyman with over 20 years experience. I also love landscape design, anything from a new patio to fencing, brick walls or even a complete new design for your garden, there is no job to small or big. Im a perfectionist who takes pride and responsibilities in his work to a high standard! Im also a qualified FGAS Air conditioning installer. Please have a look at a our pictures and feel free to contact us if you any questions.
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MEDE Property Maintenance
No reviews yet
Extension Builder in Mayfair
We are a property maintenance firm undertaking most building works regardless of size. We pride ourselves in a friendly and reliable service second to none.
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All aspects
Rating: 5 out of 5
Extension Builder in Mayfair
I have 22 years experience in the building trade I have worked for Wicks kitchens doing building work removing walls fitting steals. Extensions Plastering painting and decorating interior and exterior carpentry and tilling. Full bathroom refits and wet rooms.kitchens with wicks professional kitchen fitter The above is all work I would undertake. I’m hardworking clean and tidy with my work I always respect customers wishes.
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Latest review:
Painting & Decorating- 29 Aug 2025
Dean and Damian did an excellent Job, they were very quick and efficient and managed the jobs very well with the quirks of a very old house. Very pleased with the result and will definitely use them again.
Nms building ltd
No reviews yet
Extension Builder in Mayfair
Kitchen extension Loft conversion and internal alterations
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Mag Design & Build
No reviews yet
Extension Builder in Mayfair
At Mag Design & Build we pride ourselves on quality of work and the finished job. We take on all building work. Free quotes and easy option payment plans make the process simple and easy to work with.
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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.

Quality screening

Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

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.