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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Iver Construction Limited
Rating: 5 out of 5
Extension Builder in Mayfair
Iver Construction Ltd is a construction company, which is run by staff with over 15 years experience. We specialise in all your building needs. We work with you to build your dream home. We are happy to supply you with any references you may require.
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Latest review:
Extensions- 20 Jan 2014
We are so happy we chose to go with Iver construction to do the extension of our home. We shortlisted a few construction companies but liked the way that Mr Sanghani came over to explain their quote and went through how they would go about the job and was able to answer all the small questions I had about how I wanted things to be done. Very professional. The team was also very professional and very hard working. Everyday there would be some sort of noticeable work. they are a tidy team and would tidy any mess made. Obviously with all the dust that an extension can cause there was still some dust left but they cleaned up as much as possible which we appreciated. The communication with Mr Sanghani was very good. He would always pick up the phone when I called or call me back if he was busy no matter what time or day. After the job was completed when I had a few minor problems like cracks they came back to fix these . Even whilst building if there was something I did not like they would do their best to make changes. All in all very good, friendly and hard working builders. I have already recommended them to loads of my friends and family. Can not fault their construction skills.
StructurAll Ltd
No reviews yet
Extension Builder in Mayfair
We started our company as an engineering consultancy. We developed over the years to provide in-house architectural services, interior design, structural design, project management and asset management capabilities. We believe in client service and support throughout the life of a project, rather than just providing a design solution. So we have gained a reputation of being a one-stop-shop amongst our clients; who include private individuals, contractors, and local authorities.
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Actonstruction
Rating: 4.1 out of 5
Extension Builder in Mayfair
Actonstruction as one of the premier builders in London carries out all aspects of building work including extensions, loft conversions, renovations, roofing, joinery and much more. We are focused on providing high-quality service and customer satisfaction.
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Latest review:
Extensions- 2 Mar 2017
I used the firm's services to build an extension. Darek himself seems to be a hardworking and reliable individual. Problem is - he surrounded himself by some not very professional people, including close family members, who make things much worse for him. The other problem was that most of his team members do not seem to have much loyalty to the firm and are ready to jump to a different job any time. We had a terrible delays with our project and some things we had to completely re-do using 3rd party services. If you can ensure Darek is 100% committed to your job - could be a good project, if not - please await problems (just like I had)...
Carnot Construction Limited
Rating: 5 out of 5
Extension Builder in Mayfair
Carnot Construction are committed to ensuring our clients are satisfied from beginning to end, we aim to take the stress out of building work and complete all projects as swiftly and cleanly as possible. We ensure our clients are in safe hands with strict contracts in place to protect both parties. We specialise in Extensions, New builds, Loft Conversions, General Conversions, Kitchen and bathroom renovation/fitting.
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Latest review:
Extensions- 15 Aug 2018
100% RECOMMENDED Michelle and her partner measured up and competitively quoted within a short space of time. She was then very patient and supportive when unforeseen planning issues popped up and set the start date back by quite some time. Once building started, all questions were promptly answered by either the site manager or Michelle, both being available at all times. I was away for the duration of most of the job and it was very reassuring to know that I was leaving it all in capable and honest hands. The workers were very proficient and tidied up after themselves at end of each day. They also put in some very long hours at times to hasten the work. I was also impressed by the handling of unexpected problems during the building (mainly invasive tree stumps!). I am absolutely thrilled with the end result. High quality workmanship and a beautiful building which I am sure will last many years. I would certainly recommend them without a doubt.
London Painting Masters
No reviews yet
Extension Builder in Mayfair
Welcome to LPM We are a locally based contractor providing our services in London and surrounding areas. With +15 years experience in the industry and we are committed to quality work. We take pride in our ability to make our customers happy with our work. Thank you.
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Home Healers
No reviews yet
Extension Builder in Mayfair
We are an established property service provider for London’s residential properties, taking pride in our workmanship and the satisfaction of our customers. Our highly experienced team of plumbers, electricians, decorators, joiners, and multi traders will help you with any home refurbishment or renovation related issue, from kitchen fittings to bathroom installations. We take great pride in our customer service and it is our ethos to ensure customer satisfaction.
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Louis Dowling
Rating: 5 out of 5
Extension Builder in Mayfair
I take pride and joy in any job I am doing, always take extra time to make sure the customer is totally satisfied and understanding, there is no job to big or too small so please don’t hesitate to get in touch - I range from groundwork’s such as installing drainage or digging footings to building extensions or garden walls/piers, also specialise in repointing. I also do a lot of landscaping work such as patios, driveways, fencing concrete shed bases etc… so please feel free to get in touch
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Latest review:
Landscaping- 10 Sep 2026
Louis made a difficult job very easy by sorting all the logistical problems of removing and disposing of an old patio and getting all the new stone and aggregate delivered where there was no easy access to the back garden. He worked continuous days until the job was done and finished in good time and on the budget we agreed, which was very reasonable. Louis did the job to the spec we wanted, including cutting mitre corners on narrow concrete edging, and was very clear when offering us different options, such as how to join the patio to the side passage. Everything was cleared up at the end, and the finished patio looks exactly as we had hoped it would. Louis was always polite and is a hard worker who takes an obvious pride in doing the job properly.
S.S COUNSTRUCTION LIMITED
Rating: 4.5 out of 5
Extension Builder in Mayfair
Best quality all types of construction work cover luton watford area
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Latest review:
Extensions- 20 Sep 2023
Very poor quality workmanship. Basically a cowboy builder. Don't trust him.
Orb Vision Ltd
No reviews yet
Extension Builder in Mayfair
We are a family run construction company specialising in loft conversions, kitchen extensions and general refurbishments. THe company was incorporated in February 2000 and we have been trading for 18 years. We have completed 100's of loft conversions, extensions and house builds.
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KNIGHTBRIDGE-ONE LTD
No reviews yet
Extension Builder in Mayfair
Our mission is clear – to transform spaces into timeless works of art that seamlessly blend form and function. KNIGHTBRIDGE-ONE is driven by a passion for creating environments that not only meet our clients’ aspirations, but exceed them. Our diverse portfolio spans from groundbreaking new build works to the meticulous integration of landscape architecture, ensuring each project is a testament to our unwavering pursuit of perfection. Making innovation and expertise in design and build for conversions, extension and alteration works.
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Primefix uk
No reviews yet
Extension Builder in Mayfair
PRIMEFIX Contractors LTD Reliable. Fast. Professional. At PRIMEFIX Contractors LTD, we help homeowners, landlords, and letting agents keep their properties in perfect condition — without delays, stress, or hidden costs. We understand how important it is to get jobs done quickly and properly the first time, especially when dealing with tenants or ongoing property maintenance. That’s why we focus on fast response, clear communication, and high-quality workmanship. Our Services: Emergency call-outs Handyman services Painting & decorating Plumbing Electrical works Door installation & repairs Kitchen fitting Bathroom refurbishment Full property renovation What You Get With Us: ✔ Fast and reliable service ✔ Fully insured professionals ✔ Clean and tidy workmanship ✔ Honest, transparent pricing ✔ Flexible availability (including urgent jobs) ✔ Trusted by landlords and letting agents We don’t just complete jobs — we build long-term relationships with our clients by delivering consistent quality and dependable service. Whether you need a quick repair or a full refurbishment, PRIMEFIX Contractors LTD is ready to take care of it.
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Cre8tive Contractors Ltd
No reviews yet
Extension Builder in Mayfair
Hi My name is Eric from Cre8tive Contractors Ltd. At Cre8tive Contractors Ltd we feel proud to be part of the Federation of Master Builders and government endorsed TrustMark. This is reflective of the qualified and highly skilled craftsmen. We take pride in creating and reconfiguring your bespoke dream home, from footings to finishings, to high-end specification. We specialise in extensions, loft conversions, bathrooms, kitchens and refurbishments from design to completion. Happy to have an initial chat and arrange a free site visit at your convenience. I look forward to hearing from you. Many thanks Eric
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Montrose builders limited
Rating: 5 out of 5
Extension Builder in Mayfair
Montrose builders is family run having been established by 2 brothers Neil & Nick. Are expertise and knowledge makes us the first choice in providing building services for both homeowners and commercial enterprises. most of our work comes through recommendations providing an honest testament of the service we provide. our company is run on the cornerstones of being family run, providing quality work for the fairest price, with a company ethos of being approachable, friendly and honest.
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Latest review:
Waste Clearance- 17 Jun 2024
Excellent service, quick responses to messages and queries. Work carried out to a high standard, I wouldn’t hesitate to recommend or use them again.
S&s construction
Rating: 5 out of 5
Extension Builder in Mayfair
We can do , electric, plumbing, plastering , painting all building work
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Latest review:
It was a time challenge for me to move to newly purchased house as my rental agreement was due. I got Saby from personal reference. All home colour, wiring, removing old big boiler, water tank and rerouting of all pipe work. Roof repair , new two en suites construction, whole IKEA kitchen. He delivered as per our expectation and design in 8 weeks. No time waste and all material he arranged. I am very happy the way he professionally handled the work and delivered on time. I would recommend him. Make sure your design is ready and perfect. Discuss with him before start and avoid changes for best results.
BM Lofts ltd
No reviews yet
Extension Builder in Mayfair
BM Lofts offers the best quality of lofts conversion, roofing, refurbishment and extension. The company has been created recently, after many years of experience in construction.
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FF Solutions Ltd
Rating: 5 out of 5
Extension Builder in Mayfair
FF Solutions Ltd is a London based building company with an excellent reputation. Delivering project managed high standard workmanship with customer focus. FF Solutions provides a complete service from design to completion or working in partnership with your chosen architect. whether your looking to refurbish one or two rooms or need to completely renovate your property we are able to help.
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Latest review:
Extensions- 2 Aug 2019
FF Solutions did a fantastic job on our single storey extension with ensuite. Jay would give me daily updates as to what works were taking place and his attention fo detail is fantastic. His suggestions for cerfain aspects of the works were spot on especially our new shower room finishes. His prices were very reasonable considering rhe high spec of his workmanship. His lads were all excellent and polite and on a whole we had made the right choice choosing FF Soltions. I would 100% recommend Jay and his lads to my friends and anyone reading this feedback.

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.