Extension Builders in Marylebone, West London

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (17 reviews)

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Some of our top rated extension builders in Marylebone, West London

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HM construction
No reviews yet
Extension Builder in Marylebone, West London
H.Muzaci Contractor is a well-established building company with over 25 years of experience in the construction and renovation industry. We specialise in home renovations, extensions, refurbishments, and general building work, delivering high-quality results from start to finish. We pride ourselves on excellent workmanship, reliability, and attention to detail, no matter the size of the job. From initial planning through to completion, we work closely with our clients to ensure projects are delivered on time, within budget, and to a high standard. Customer satisfaction is at the heart of everything we do. We are tidy, respectful, and committed to clear communication throughout the project. Much of our work comes from repeat customers and recommendations, which reflects the quality and trust we’ve built over the years. Clients from all over City of London with references (Mayfair, Chelsea, Portsman Square). If you’re looking for an experienced, honest, and professional builder, H&M Construction would be happy to help.
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North Builders LTD
Rating: 4.8 out of 5
Extension Builder in Marylebone, West London
North Builders LTD have a team of specialists which gives you quality and high standard work on Loft conversions, Extensions, Roofing, Renovation, Refurbishment. We based in London and we cover all M25. With the best quality work and proffesional prices on the market we managed to make happy a lot of costumers around London and not only. Our priority is the costumer to be satisfied, the project to finish in timeline and on budget. Contact us for free quotes.
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Latest review:
Loft Conversion- 2 Nov 2025
Full loft conversion with dorma. Blerim always asked the right questions and made really good suggestions. Very helpful and great quality. Would happily recommend him and his team.
Electroplumech MEP Services Ltd
Rating: 5 out of 5
Extension Builder in Marylebone, West London
Service, repair and installation: Mechanical Electrical Plumbing HVAC (Heating, Ventilation and Air conditioning) Pumps
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Latest review:
Plumbing- 22 Dec 2025
Very good Came on time, very nice and polite, did the job (only time will tell if it is fixed unfortunately), hassle free service
G Iancu Construction
Rating: 5 out of 5
Extension Builder in Marylebone, West London
At G Iancu Construction Ltd there is no work to small or to big, we pride ourselves in helping and meeting our customers requests with always best results .
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Latest review:
Kitchen Fitting- 4 Feb 2025
Thank you for doing a fantastic job fitting our new kitchen. Georgian worked quickly and efficiently and gave great recommendations on how to stay within our budget. Thanks again for a great job!
FBF Construction Ltd
Rating: 5 out of 5
Extension Builder in Marylebone, West London
We take all types of jobs from demolish a house and rebuild at the highest standards.
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Latest review:
Florin extended and completely refurbished our 4-bedroom semi-detached house. This included extensive steelwork, underfloor heating, complete re-plumbing and rewiring, excavation, and an entirely new slate roof as well as varying extensions up to three floors high. I cannot say enough good things about his workmanship, professionalism and reliability. His workmanship makes a perfectionist like myself happy. He is also completely professional: even with our difficult neighbours he was always courteous and understanding, and even helped them sort out issues at a moment’s notice that had nothing to do with his building work on our property. And he is also thoroughly reliable. I cannot think of any instance where he committed to something and did not deliver — he even managed to finish all the work on our house ahead of schedule and on budget. We have been so happy with his work that we contracted him to build us a summer house as well, from scratch, and to complete revamping our front garden including elements of hard landscaping. Again he delivered flawlessly and we are very happy with the result. We also continually receive positive comments from people passing by and just seeing the front garden. We have used several other builders in the past on other properties, including far more expensive ones, and none compare to his level of competence, attention to detail in his workmanship, his complete professionalism and thorough reliability. Now that we have found Florin, we will never look for another builder again. I just hope once others experience what he delivers for themselves he will still have some availability for us in the future!
Memaar Construction
Rating: 5 out of 5
Extension Builder in Marylebone, West London
Our Expertise MEMAAR Construction is a business specializing in refurbishment, renovation, extension, painting, flooring, decoration, tiling, and demolition services. With a commitment to quality craftsmanship and a customer-centric approach, MEMAAR emphasises personalised service and priorities client needs. The business is supported by an expert team in the construction industry and aims to use sustainable practices while offering affordable pricing without compromising quality. Refurbishment is about improving or refreshing existing structures without making major changes to the layout. It often involves repairs, repainting, replacing fixtures, or upgrading finishes to bring a building back to a good condition. For example: updating office interiors, repairing walls, replacing windows, or modernizing outdated spaces.
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Latest review:
Hard Flooring- 12 Jun 2026
Memaar construction provided a seamless service from start to finish. I’m very grateful to Sayed for his expertise and advice on which type of flooring would be best suited to my home, he was very patient and worked with me to make sure I was happy with my choices. The team did an excellent job and were very professional throughout. They installed high quality LVT flooring in 3 bedrooms, front room and dining room, Plus really lovely carpet to stairs and landing and porcelain tiles to the bathroom and kitchen. Would definitely hire them again really pleased with the result, couldn’t be happier.
Majesticbuild
Rating: 3 out of 5
Extension Builder in Marylebone, West London
At Majestic Build Construction Company, we don’t just build structures; we craft environments that blend seamlessly with nature. With a passion for creating breathtaking outdoor spaces, our landscaping services are designed to enhance the natural beauty of any property, be it residential, commercial, or public. We specialize in: • Custom Landscape Design: Tailored to suit your vision and the unique features of your land. • Hardscaping Solutions: Including patios, walkways, retaining walls, and water features that add depth and functionality to your outdoors. • Sustainable Landscaping: Focusing on eco-friendly practices and native plant selections for a greener future. • Comprehensive Maintenance: Ensuring your landscapes remain as vibrant and immaculate as the day they were created. With a dedicated team of professionals and a reputation for excellence, Majestic Build Construction Company transforms ordinary spaces into extraordinary outdoor experiences. Let us bring your landscaping dreams to life!
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Latest review:
Bricklaying- 17 Dec 2024
They initially gave a fair price and a date and timeline that fitted with our needs. Subsequently they over ordered on the bricks so we had over 100+ expensive London bricks left over and they under ordered on sand and cement.(Luckily the shop took them back but we had to deliver them there) The job took far longer than they had said although the poor weather did not help much which could not be helped. The worst was that the wall was finished so that the latch of the gate could not be fitted as the wall was a bit too long! The wall looks good but their customer service and time given for job as well as ordering materials needs some improvements. They are pleasant workers, not rude in speaking
L7 Enterprises Limited
Rating: 5 out of 5
Extension Builder in Marylebone, West London
We have carried out many refurbishment, extension and loft conversion projects for our own properties and now we have a good strong team we are looking to do more for the general public in between our own projects. Experience wise, across the team we have fully refurbished over 50 properties between us and always strive to leave a happy customer. For more details of our work, client testimonials & our team
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Latest review:
Carpentry- 24 Jun 2016
Excellent job polite team very helpful, prompt & efficient and follow up very good. Would certainly use again and recommend
Bros con limited
Rating: 5 out of 5
Extension Builder in Marylebone, West London
experience in both commercial and private property renovations specializing in Extensions, House refurbishment, Loft and Garage conversions, Driveways and Patios. Please get in touch for a friendly free-of-charge no obligation consultation. Many thanks, Teodor
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Latest review:
I received quotes from multiple builders to build a garden office, and choose Teodor as he provided the best quote. His workmanship is top quality and he built me a fantastic garden office which I am enjoying immensely. Teodor was very professional and reliable, keeping me involved throughout the whole project. I will be using his services again in the New Year and can wholeheartedly recommend Teodor.
AJT Construction Beckenham Ltd
Rating: 5 out of 5
Extension Builder in Marylebone, West London
AJT CONSTRUCTION WE BUILD WHAT WE LOVE, AND WE LOVE WHAT WE DO With today’s uncertain economy choosing the right builder for your project has never been more important.From conception to final build and completion it is vital to work with a company that understands your needsand has expertise to deliver on time and within budget. For over 30 years, we have built an enviable reputation in Beckenham and the surrounding areas, successfullymanaging projects in the construction industry
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Latest review:
Extensions- 23 Mar 2022
Dealing with Jason was an absolute delight. He was punctal, provided some great advice and introduced me to a great conservatory manufacturer. Would definitely use him again for further building work. Highly recommend.
Green Vista Estates Ltd
No reviews yet
Extension Builder in Marylebone, West London
At G.V.E.Contractors we specialise in transforming kitchens into the heart of your home. Our expert fitters bring precision, experience, and dedication to every project, ensuring exceptional results. Our Services: - Full Kitchen Installations: We handle complete kitchen fittings, including cabinetry, worktops, appliances, and fixtures. Our team ensures everything is installed to the highest standards. - Kitchen Renovations: Updating and remodeling existing kitchens to improve functionality and aesthetic appeal. We work closely with you to design and implement changes that meet your needs. - Custom Cabinetry: We design and fit bespoke cabinets tailored to maximize storage and match your kitchen’s style. Our custom solutions ensure your kitchen is both beautiful and practical. - Worktop Installations: Precision fitting of worktops, including granite, quartz, laminate, and more. We ensure a seamless and durable finish for your kitchen surfaces. - Plumbing and Electrical Work: Our services include the safe and efficient installation of all necessary plumbing and electrical components, ensuring your kitchen is fully functional.
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Arnold design and build limited
No reviews yet
Extension Builder in Marylebone, West London
Over 20 years experience within Driveways and Landscaping , Building and construction
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SPEKT GROUP LTD
Rating: 4.8 out of 5
Extension Builder in Marylebone, West London
We are a team father and sons, with over 30 years of experience in Wood Occupations and construction sites, who's goal it's to provide our customers with quality services.
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Latest review:
Carpentry- 11 Mar 2025
Great work and would recommend!
Interior&exteriorbuild
No reviews yet
Extension Builder in Marylebone, West London
We complete all projects in accordance with relevant planning and building regulations. It doesn’t matter if we’re working on a small refurbishment, or a large project,
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C&L Construction services LTD
No reviews yet
Extension Builder in Marylebone, West London
At C&L Construction Services Ltd, we specialise in providing a complete construction service delivering refurbishment, development and maintenance services. We work on any projects from homeowners looking to extend complete /refurbishment of bathrooms and kitchens, modernisation for smart homes and automation systems and a full project management and design service. We can advise on material selection help navigate the minefield of planning building and health and safety regulations
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Ali builder
Rating: 5 out of 5
Extension Builder in Marylebone, West London
Hey I go with the name of Ali builder! I been working in the building field for the last 20 years and have got many clients and every client I work for I make sure I do the 100 percent perfect !
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Latest review:
Mr Muhammad is a great guy with a lot of skills and he was refer to me by friend and he has done my work very nice and on time . Very professional man with great sense of hummer

4.1

Top rated Extension Builders

Our Extension Builders in Marylebone, West London, are rated 4.1 out of 5 based on 17 reviews from customers like you.

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What types of services are offered by local extension builders in Marylebone, West London?

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 Marylebone, West London 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 Marylebone, West London who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Marylebone, West London?

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

Find extension builders in Marylebone, West London with MyBuilder

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

Step 2: Compare different extension builders in Marylebone, West London

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

Step 3: Hire Marylebone, West London extension builders with confidence

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

Marylebone, West London extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Marylebone, West London extension builder before hiring?

Before hiring an extension builder in Marylebone, West London or extension building company in Marylebone, West London, 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 Marylebone, West London?

An extension builder in Marylebone, West London 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 Marylebone, West London 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 Marylebone, West London?

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 Marylebone, West London 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 Marylebone, West London 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 Marylebone, West London

Can an extension builder in Marylebone, West London help with planning permission?

Yes, many extension builders in Marylebone, West London 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 Marylebone, West London handle everything from design to construction?

Many Marylebone, West London 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 Marylebone, West London help with materials and finishes?

Yes, most extension builders in Marylebone, West London 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.