Extension Builders in Mayfair

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (18 reviews)

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Some of our top rated extension builders in Mayfair

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Affordable Building Company
Rating: 5 out of 5
Extension Builder in Mayfair
We specialise in both internal and external building works within the domsestic market and offer a compete build sevise from project design all the way to project completion. We have specialist crews for all projects, lofts, extensions and coservatories.
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Latest review:
Extensions- 26 Sep 2012
Andy and his team did a fantastic job. Our neighbours were very uncooperative and restricted noisy working hours quite severely but Andy was very accomodating. He is very easy to talk to and happy to discuss ideas you may have concerning the build. I would definately reccommend him. We are delighted by the extension and will definately use Andy again in the future. Thanks!
Goldenkey Constructions London LTD
No reviews yet
Extension Builder in Mayfair
Goldenkey constructions offer a complete end-to-end service including property construction, refurbishment, renovation and maintenance. We offer an all-inclusive service for all Building and Construction Services needs with a team of Fully Qualified and Skilled Tradesmen and Engineers working alongside Architects and Interior Designers. Our Services include, Design and Build, Renovations, Loft Conversions, Extensions along with Commercial Refurbishments and Office Fit Outs.
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VWP Carpentry
No reviews yet
Extension Builder in Mayfair
At Vwp carpentry we pride ourselves on on creating your vision with precision. Wether it’s hanging an internal door or a loft conversion
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Khbuilder ltd
Rating: 5 out of 5
Extension Builder in Mayfair
Hi I’m Khbuilder ltd I have 16 years on business building Trade extension and lots of building work I have a website which you can see lots of more information thanks
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Latest review:
Extensions- 6 Jun 2021
I requested quotes from 10+ builders, regardless of their price I already knew I was going with KHbuilder as instantly they seemed genuine & trustworthy! Hasan never changed his price during the project which is a fear many have during a build, he has a great team, friendly and always courteous. His workmanship is very good, therefore he is now also doing my patio and garage, he has great suggestions and contacts which has saved us money. His attention to detail and reliability really does shine through, our neighbor is now also doing the exact same 4 meter extension with a new kitchen move, the fibre glass roof and the bifolds all starting to take shape and look fantastic, just search for KHBuilder on instagram where they have posted the progress so far of all the work being done! We will genuinely miss all the guys being around. A very rare find in the building trade!! Thanks KH Builder...
Elvis Torba
New on MyBuilder
Extension Builder in Mayfair
Hi, I’m Elvis, a professional bricklayer with over a decade of experience in all aspects of brickwork and masonry. I take pride in delivering high-quality workmanship, whether it’s garden walls, extensions, repointing, repairs, patios, or new builds. I’m reliable, hardworking, and always make sure every job is completed to a high standard with attention to detail. Customer satisfaction is very important to me, and I always aim to keep work areas tidy, finish on time, and provide honest, competitive pricing. I cover local surrounding areas and am happy to take on both small repairs and larger projects. If you’re looking for a trustworthy bricklayer who takes pride in their work, I’d be happy to help.
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A&R Construction services
Rating: 5 out of 5
Extension Builder in Mayfair
We are a construction and development company based in West London, specialising in high-end residential refurbishments With over 15 years of experience, We take pride in our building works, so when you choose A&R Construction for your project, you will work directly with us and we’ll ensure to get you the best rates possible from suppliers, including: kitchens, tiles, wooden flooring, bi-fold doors, and sanitary ware.
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Latest review:
Roofing (Pitched)- 5 Apr 2024
I recently had the pleasure of working with the A&R company for roof repairs and transformation, and I must say, I couldn't be more impressed. Not only did they do an exceptional job with the repairs and transformation of my roof, but Amar and Jatinder went above and beyond by assisting with other minor fixes. Their friendly demeanor and professionalism made the entire process smooth and stress-free. I highly recommend A&R for their top-notch service and exemplary team members.
Gilroy Building Services Ltd
No reviews yet
Extension Builder in Mayfair
We are a general building company who pride ourselves on quality workmanship and providing each client with a great all round building service. We carry out both commercial and residential contracts, having worked for companies such as Taylor wimpy, Simcott projects, Michealis Boyd, Witherslack group and others. We provide quality, skilled, certified trades people with a wealth of experience so you can rest assured the work will be of a high standard. Get in touch today for a free quote!
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TG Building Services
No reviews yet
Extension Builder in Mayfair
NEW BUILD - EXTENSION - CONVERSION RENOVATION BUILD WITH CARE FINISHED WITH PRIDE - Plumbing - Electrical - Carpentry - Roofing - Ground works & Drainage - Brickwork - Architectural brick & Stone works - Designer Stairs - Decorative flooring & Tiling - New Kitchens & Bathrooms - Window Installation - Alarms & CCTV - Custom Fencing - Decking - Patios - Conservatories - Decorative paving & Driveways - Metal gates,Railings & metal Fabrication - External wall insulation
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HSAO LTD
No reviews yet
Extension Builder in Mayfair
We build residential homes and commercial shops—with a personal touch! HSAO Limited was established with a vision to innovate and transform the real estate and property development landscape. Rooted in a commitment to excellence, our company prides itself on delivering bespoke solutions that cater to the unique aspirations of our clients. With sustainability, quality, and integrity as our guiding principles, we focus on creating spaces that not only inspire but also stand the test of time. At HSAO Limited, we view each project as an opportunity to make a positive impact—building not just properties, but trust and enduring relationships. Together, we shape a future where potential meets possibility.
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GL Design and build Ltd
No reviews yet
Extension Builder in Mayfair
Refurbishments, Extensions, loft conversions all building works
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Best decor london ltd
No reviews yet
Extension Builder in Mayfair
We are a team of builders trading from 2016
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Kodi construction
No reviews yet
Extension Builder in Mayfair
We are a trusted building and renovation specialist, dedicated to creating high-quality home extensions that enhance space, functionality, and value. With a team of experienced designers, builders, and project managers, we deliver tailored solutions from initial concept to final completion. Our focus is on craftsmanship, communication, and customer satisfaction. Whether you’re expanding your living area, adding a new kitchen, or transforming your home with a two-storey extension, we combine technical expertise with architectural vision to bring your ideas to life — on time and within budget. We also carry out all Home improvement works .
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Europe United ltd
No reviews yet
Extension Builder in Mayfair
Europe United ltd. is a UK-registered limited company, established in 2015, providing civil engineering and construction services with a focus on new-build and small-scale development projects. The company combines practical site experience with sound technical knowledge to deliver safe, compliant and cost-effective works for residential and commercial clients. Operating primarily in London and the South East, Europe United ltd undertakes activities such as groundworks, structural alterations, minor civils, and coordination of specialist trade contractors. The company works closely with design professionals, warranty providers and building control to ensure that projects are delivered in accordance with current regulations, industry standards and client specifications. Europe United ltd maintains a strong emphasis on health and safety, quality management and programme control. The company adopts a collaborative approach on site, prioritising clear communication, accurate record-keeping and proactive risk management to minimize disruption and achieve reliable project outcomes for clients and their stakeholders.
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Court's Home Extensions
Rating: 1 out of 5
Extension Builder in Mayfair
With nearly 20 years experience i joined the building trade at 16, going into bricklaying very soon after. I have worked for 4 very well known east London extension company and have built an excellent portfolio through customer recommendation. I have accumulated an excellent team of tradesmen ensuring consistent high standard finishes
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Latest review:
Extensions- 17 Jan 2018
A Total disappointment Ricky agreed to install a porch and roofing. He advised us to install new pvc doors agreeing to fit the roof after. This started mid November with a promise to be completed before Christmas. On his instruction we paid other workers to complete the preparation works and then the morning of the Job he sent a text message advising that he will no longer be able to attend the job. Thankfully we were able to find a local reputable roofer -plasterer-tiler who completed the work to a very high standard I feel very let down as I had put total trust in his promise to complete the work. Unfortunately based on this I cannot confidently recommend Ricky to a friend family, or anyone else.
HR RENOVATIONS
Rating: 5 out of 5
Extension Builder in Mayfair
HR Renovations cover all aspects of building renovations.
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Latest review:
Painting & Decorating- 2 Jul 2025
Would highly recommend HR Renovations. A massive thank you to Ben and his team. They did a fantastic job of renovating my house and I would definitely be using them again! I would highly Recommend HR Renovations.
KCK Renovation
Rating: 5 out of 5
Extension Builder in Mayfair
I have been involved in the building industry for over 15 years with an extensive portfolio of renovated properties across London. My background comes from interior design which has lead me over the years to develop a great eye for interior architecture which has therefore abled me to give my clients innovated and creative ideas for all their property needs,Within our work quality and design is key.
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Latest review:
Extensions- 25 Apr 2018
Initially when using My Builder, I didn’t really have any intentions of working with tradesmen from here, it was more to benchmark and see where a quotation would be priced however upon meeting Vijay, that pretty much changed from the first meeting. If you’re looking for someone who treats your project like their own, he’s the man. Vijay takes 110% pride and care into every aspect of your project. Although work is yet to commence on my property, the spec Vijay has put together itself is worth a lot of money, and most would consider it invaluable. From my opinion so far, no stone will be left unturned where Vijay’s project management and work is concerned. Without thinking twice, I would highly recommend anyone considering Vijay, to at the very least, meet with him and show him the work required. From there on, your mind will be made up. Looking forward to working with him in due course

4.1

Top rated Extension Builders

Our Extension Builders in Mayfair, are rated 4.1 out of 5 based on 18 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.