Extension Builders in Marylebone, West London

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 Marylebone, West London

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Ifa construction ltd
Rating: 5 out of 5
Extension Builder in Marylebone, West London
House extension, lofts conversion, house refurbished, and new build
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Latest review:
Restoration & Refurbishment- 2 Jul 2023
AJ was thorough, friendly and thought things through. I would recommend him.
GURRA CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in Marylebone, West London
Kitchen & bathroom refurbishment Electrical work Extension Full refurbishment
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Latest review:
Carpentry- 20 Mar 2022
Very reliable & jeen to work
Ndreu builders
Rating: 5 out of 5
Extension Builder in Marylebone, West London
Hello,I have 23 years working in construction. I am specialised experience within painting and decorating. I also complete domestic and commercial property refurbishments, silicon rendering, driveway and patio installations, plastering and gardening. I mostly take on all kinds of multi trade work. Please don’t hesitate to contact me for any enquiries.
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Latest review:
Handyman- 20 May 2026
He’s friendly and completes the job with care.
Artnavix Design Limited
Rating: 5 out of 5
Extension Builder in Marylebone, West London
With over 20 years in the trade, we deliver high-quality refurbishments and finishes for both residential and commercial clients across London, mainly South Kensington, Chelsea, Mayfair, Surrey. I started on the tools as a labour with all trades, after decide work as a fully-qualified painter & decorator, spray painter and joiner, so I know exactly what good workmanship looks and feels like. After progressing into supervisor, site manager and project manager roles on projects ranging from high-end homes to large commercial fit-outs, I now run my own professional team. What we offer: Full internal & external painting and decorating, Airless spraying (fast, flawless finishes), All aspects of plastering, dry-lining and repairs, Bespoke joinery, skirting, architraves, doors and flooring, Complete refurbishments and renovations, Commercial office and retail fit-outs. One-stop solution Because we’ve built long-standing partnerships with trusted, fully-certified plumbing, electrical and home-automation specialists (including Lutron, Crestron systems), we can manage and deliver every aspect of your project under one roof – no juggling multiple contractors, no delays, one point of contact from start to finish. We pride ourselves on clear communication, keeping to programme, protecting your home or business, and leaving every job spotless. All work is fully insured, £10M liability insurance, completed to the highest standard and backed by genuine customer reviews. Whether it’s a single room refresh or a whole-property transformation, get in touch for a free, no-obligation quote – we’d love to help bring your project to life!
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Latest review:
Painting & Decorating- 13 May 2016
Alex and his team were amazing workers - worked late into the night on several occasions and always left everything so tidy They are all so skilled - they can do anything u need done - anything - brilliant all rounders The spraying of the kitchen is unbelievable it's like a brand new kitchen They also tiled for us and put up a new hood, installed a new worktop and put a new sink in - anything u need doing they can do and nothing is ever too much trouble for them In all the years we've been using tradesmen ( and we've done up several properties) they were the best, most hardworking, reliable, dedicated tradesmen I would recommend them to anyone We are so glad we found them as we will be using them for every job we need doing round the house Amazing!!!!
Lezha Building Ltd
Rating: 4.9 out of 5
Extension Builder in Marylebone, West London
LEZHA BUILDING LTD Hello my name is Astrit. I’m the Director of the company We have a lot of experience in different trade so my business started in Italy but from 2015 we are based in london do not hesitate to contact no matter small or large work, we will reach you wherever you are.Thanks 🙏
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Latest review:
Tiling- 10 May 2019
As per the previous reviewer I don't usually hire tradesmen when there is only limited feedback, but given the glowing report I took the risk. And it proved to be a great decision. Astrit was great - clear communication, arrived when he said he would, sought our opinions on the key decisions and gave some great advice, before ultimately doing a great job for a reasonable price. A pleasure to deal with and will hire again for any future tiling work. Thanks Astrit.
TPR Builders
Rating: 5 out of 5
Extension Builder in Marylebone, West London
I have worked as a builder for the past seventeen years in London. I have done many projects ranging from lofts and extensions, I have gained experience over the years. My goal is to work in my local area.
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Latest review:
Kitchen Fitting- 29 Nov 2025
Pawel did a great job replacing a roof light and repairing two walls on our home office - an efficient, reliable and knowledgeable contractor.
FLV PROPERTY LTD
Rating: 5 out of 5
Extension Builder in Marylebone, West London
At FLV property ltd we are a team of skilled professionals with extensive experience in the construction industry for over 30 years. Whether you are planning a new build, an extension, a renovation or bespoke projects, our expertise ensures that every job is completed to the highest standards on and within budget. What we offer; •A team of dedicated professionals •Architects •Structural Engineers •Surveyors •Multi skilled tradesmen Attention to detail from design to composition. Our promise; We understand that building projects are significant investment's, and our goal is to make the process as smooth and stress free as possible. From initial consultation to project completion, we work closely with you to ensure your expectations are not only met but exceeded. LETS BUILD TOGETHER!
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Latest review:
Gus and Frank were brilliant. Their attention to detail and care for our project was evident. There was already an issue with our floor which Gus and Frank rectified for us before doing the tiling. The final finish was immaculate. We liked their work so much that we also got them to fit our kitchen worktop. Good communication and clarity throughout the job. Would definitely recommend!
BLUELIME CONVERSIONS LTD
Rating: 4.7 out of 5
Extension Builder in Marylebone, West London
Bluelime is a one stop shop for all your planning, interior design , structural engineering and construction needs. With over 8 years worth of happy customers we pride ourselves with our honest and inventive solutions. Free initial consultations and proven track record of planning approvals.
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Latest review:
Extensions- 8 Oct 2018
Alton and his team at Bluelime have been incredibly helpful and enthusiastic throughout our design and planning process. From the start, Alton took his time to understand our needs and propose several cost-effective ways to improve my home and create more space for my growing family. The design process was completed efficiently and submitted for planning permission, which was granted without a problem. Since then, his team have continued to be helpful and communicative despite my need to delay to the building works due to unfortunate complications with my freeholder.
N EXTENSION KINGS LTD
Rating: 5 out of 5
Extension Builder in Marylebone, West London
I've been working in building trade for over 15 years , we can undertake any job small and big from foundations to the roof and anything between. We can provide any references,Me and my team take pride at what we do and we do it first time right .our work is second to none , and proof of that is that you don’t pay anything upfront till you are fully satisfied with the quality.
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Latest review:
Great job by Nick and the team, good attention to detail and very helpful, they went the extra mile to get a nice finish and make sure we were happy. We used after a neighbour also had a good experience.
WHG Consultancy Ltd
Rating: 5 out of 5
Extension Builder in Marylebone, West London
Award winning builders in South West and Central London. We offer a complete range of design and build services for residential and commercial customers include new build developments, renovations, refurbishments, reconfigurations, extensions, bathroom and kitchen fitting, as well as bespoke carpentry, joinery and electrical work. We think your property is as individual as you are and help you to achieve your ideal home through our highly skilled & experienced team of designers and builders.
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Latest review:
Restoration & Refurbishment- 28 Dec 2015
I did quite a bit of research before choosing Battersea Builders. They didn’t come in with the cheapest quote but I never base my choice on price alone. And it wasn’t miles above the other quotes I got. Instead, I chose them because they ticked a lot of boxes including a) good independent reviews, b) a dedicated PM, c) qualifications, d) quick responses, e) a decent website etc. Overall, they did a fantastic job. The quality of the work and finish is really good. The PM, Tommy, was really helpful throughout and the team was very polite and conscientious. They were also on site every day as promised and didn’t play that old builders trick of getting the job and then going offsite to secure another job elsewhere (resulting in the deadline being missed). Was it perfect? No, but then not many projects are. I have a few minor comments including the fact there was a misunderstanding about the quality of bathroom cupboard I needed so the original quote was insufficient and costs had to be increased half way through the project. Despite this issue, Tommy did his best to keep the extra costs down. One other niggle was that I asked them to keep all the manuals and instructions for all the fittings but they threw them out. Not a big deal but quite annoying. Overall, it wasn’t cheap but I would use them again because the work was done to a high standard and the team were a pleasure to work with.
Build By Design Ltd
Rating: 5 out of 5
Extension Builder in Marylebone, West London
Well established in London, Build By Design ltd has developed all of the necessary skills and expertise to ensure a perfect finish to every project. Build By Design offers the full turn-key service.
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Latest review:
Restoration & Refurbishment- 3 Aug 2023
Great team. Did an excellent job and very good value. Would highly recommend.
Fornes Limited
Rating: 5 out of 5
Extension Builder in Marylebone, West London
No matter what size your requirements are, we provide a complete project management and a full turnkey service from simple kitchen or bathroom make up to more complex projects and skilled finishes like Mediterranean style. No hidden costs and all jobs guaranteed. We speak English and Spanish.
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Latest review:
I've used Facundo's team to install a new shower, including wall and floor tiling, massage jets, and concealed shower equipment. Facundo was the person we dealt with at all times, although someone else was assigned to do the job. The quality of the work and finish is extremely good. I was also impressed with Facundo's professional attitude at all times, being very polite and respectful, as well as proactive in addressing any potential issues affecting our planning and execution. Highly recommended.
Good Choice Builders LTD
Rating: 5 out of 5
Extension Builder in Marylebone, West London
We are the building company that specialized in Loft Conversions, Extensions and Refurbishments. By this moment we worked as a subcontractors, now we have all neccessary and feel free to participate to the tenders, prepare the informative and detailed contracts and estimations, management.
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Latest review:
Extensions- 8 Jul 2019
A very efficient builder who did the plans which where passed first time when we needed help he found someone to help very clean and tidy and on time
RESSI LTD
Rating: 5 out of 5
Extension Builder in Marylebone, West London
RESSI is a London-based building contractor, specialising in refurbishing and building lofts and extensions. We are a family run business with a focus on spending time with our clients to make the experience worthy of the investment. We have a great eye for detail and can help you with all your choices such as kitchens, joinery (our own), sanitary ware and anything else you might need.
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Latest review:
It is stunning. Loved working with Ressi. The end result is perfect. It is our dream home. They listen well and want to do what is best for all
T Dardeshi
Rating: 4.7 out of 5
Extension Builder in Marylebone, West London
I am a builder with the experience for 20 years. Qualified carpenter in UK and hold a level 3 diploma. NVQ level 2 Carpentry and Joinery.I also have a SMSTS certificate, first aider, Pasma and working with asbestos certificates. I have a humongous experience and knowledge in most of the fields on building works. I mostly work in central London in project of different budgets from £100K to over 2 million pounds. However I also do small projects as well as those are more interesting because you meet more client with all sort of ideas and designs. I have a team of qualified builders , plumbers, electricians,carpenter,handyman etc I do jobs from structure, demolition, carpentry, plumbing, plastering, paintings and all sort of renovation including roof work. I always work to archive the highest quality work that will satisfy my clients and also my self. Being trustworthy and loyal is the main characteristic of my self and my team as this helps me to gain good clients and lots of work.
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Latest review:
Hard Flooring- 4 Dec 2022
Professional, dependable and trustworthy contractor and a person. Completed the work to spec provided and delivered the same within agreeable framework and quality.
W8 Build Ltd
Rating: 5 out of 5
Extension Builder in Marylebone, West London
Hi, I’m Jon, the Founder of W8 Build. With over three decades of experience in both modern and listed buildings, I’ve dedicated my career to transforming spaces – from bespoke home extensions and loft conversions to the careful restoration of historic landmarks. I even had the honour of working on Windsor Castle alongside Her Majesty The Queen after the 1992 fire, a project that taught me how to balance grandeur with precision. At W8 Build, we believe exceptional craftsmanship should be accessible. Grounded in values of integrity, reliability, and meticulous attention to detail, my team and I bring the high standards of historic restoration to every project – all at market-competitive rates. Whether you’re seeking a stylish roof terrace, a complex basement conversion, or a heritage-sensitive renovation, you’ll receive a fixed-price, transparent proposal and a commitment to excellence that makes quality affordable. There are no hidden fees or inflated costs here – just clear communication, thoughtful planning, and the peace of mind that comes from working with a team that treats every project, whether a royal landmark or your family home, with equal care and professionalism. Let’s work together to bring your vision to life, blending timeless quality with modern practicality. Your dream space deserves nothing less. W8 Build by Jon Taylor
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Latest review:
Extensions- 14 May 2025
Jon was able to take a failed project from a previous contractor and manage historic building preservation, regulation in Westminster, a lack of parking, plumbing from the Victorian age, and a demanding client to deliver a beautiful result. I love my garden flat extension, it manages to respect the historic nature of a building from the 1840s while also adding amenities to be proud of in 2025. Thank you Jon (and team) and best of luck with future business.

4.1

Top rated Extension Builders

Our Extension Builders in Marylebone, West London, are rated 4.1 out of 5 based on 18 reviews from customers like you.

Quality screening

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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.