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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AG south construction
Rating: 5 out of 5
Extension Builder in Marylebone, West London
I'm qualified bricklayer with 20 year's experience, I'm doing refurbishements and new houses work from start to finishing off in very high standard.
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Latest review:
Extensions- 13 May 2026
Agim completed a ground floor extension for me in 2025 and I would not hesitate to recommend him for similar work. The quality of the work was excellent and the team worked tirelessly for months to ensure it was completed on time and for a reasonable price. Agim was able to adapt quickly when any unforeseen problems occurred, always clearly communicating possible solutions to help keep the project moving. Having people in your home can be difficult but Agim is very respectful and considerate, making sure to put our needs first. The results are fantastic and Agim continues to help snag any minor issues that come up. I couldn’t be happier with how things went, testament to his professionalism. Thanks Agim for all your help on this project.
Wrightson Construction Ltd
No reviews yet
Extension Builder in Marylebone, West London
Over 30 years in the industry. From large new build projects and developments to extensions, loft conversions, structural works, eco build, bespoke cabinetry, including veneers and specialist spray paint finishes. Commercial projects - restaurants, bars and recording studios.
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South construction
Rating: 5 out of 5
Extension Builder in Marylebone, West London
Been working in the construction trade for over 20years. Main trade is plastering and skimming which i started 30years ago but can do many different jobs with the skills built over the last 30years. Job quality comes first and work is never compromised.
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Latest review:
Plastering- 26 Aug 2021
Indyreshpal was extremely professional. He plastered my bedroom walls and ceiling, added coving and scerting as well as painted and wall papered my room. He was efficient and his work was of a very good quality. Very happy with his work and definitely will use him again for future work.
In Out Constuct
Rating: 3 out of 5
Extension Builder in Marylebone, West London
My company In Out Construct we are a professional building company which you the client can fully trust. We specialise in most building aspects such as : Refurbishments, Wall openings, structural steel installations, Loft conversions, removal of chimneys, kitchens, bathrooms installation, Kitchen extensions, painting decorating. We always aim to fulfill our customer needs, comply with all British Standard regulations and make sure all our work is of best standard, and complited on time.
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Latest review:
Kitchen Fitting- 16 Jul 2018
Very good work and completed on time. Highly recommended.
M & M ROOFING AND LOFTS LIMITED
Rating: 5 out of 5
Extension Builder in Marylebone, West London
We design for life, as well as style. That's why clients have trusted Mew developments for the past decade. We cover all aspects of the building trade quality is at the heart off everything we do. All of our tradesmen are passionate about creating solutions that are comfortable and useful. They are all individually trained to meet our exacting standards and, more importantly, yours.
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Latest review:
Extensions- 22 Oct 2018
Choosing MM builders was the best decision we could have made. Initial meetings: They took time to ensure they understand our work. They never complicated matters nor tried to hide things in any fine print and provided us with a estimated schedule and explained we would be kept up to date at all stages. Works: Their knowledge and work ethic is amazing and is reflected in their work. They gave us confidence and built trust very quickly. Always willing to go the extra mile and used their expertise to help us rectify issues or make suggestions in areas we would have never noticed ot thought of. Sam, Ross, Bill & Harry were so pleasant to have around the house. They were very conscious of the 3 young children in the house of which one has additional needs. They minimised disruption which is very difficult when doing major work in a areas and were always friendly and polite. We had no issues in having them inside our property which is very important when completing works taking just over 5 months. They work with specialist tradesman (tiler, plasterer, etc.) who are equally good at their trades. MM were very professional when it came to liasing with Building Control and made sure they were involved and visited at all key points. The aftercare we received was as good as we had received throughout the process. I have no hesitation in recommending MM for any building works. If I was to ever undertake any works in the future, it would be by them and only them.
SANDAROV LTD
Rating: 5 out of 5
Extension Builder in Marylebone, West London
W h a t s A p p for instant quote Sandarov Ltd is one of the most reputable, reliable and professional companies in London. We offer first class domestic maintenance, building and refurbishment services across London and surrounding areas. We assure our costumers that all our work is carried out to the highest industry standard and is fully insured and guaranteed. At Sandarov, we only employ skilled and experienced tradesman who take pride in delivering professional building service.
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Latest review:
Landscaping- 19 Apr 2019
Thanks so much ! Very happy with the result, my garden has been completely transformed. Excellent job done to a high Standard. The team were courteous, helpful, flexible and professional throughout the job. Good communication and fair price. Recommended
B & M Home Improvement
Rating: 5 out of 5
Extension Builder in Marylebone, West London
We are a local and reliable Plumbing, gas safe and Home Improvement Company in London and surrounding areas.I gained my experience working in the Plumbing and gas department. No matter whether you require help with plumbing, power flushing, boiler installation, bathroom, kitchen, extention, flooring we take on all building work. We provide a full interior decorating service for domestic and commercial.
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Latest review:
Extensions- 10 Apr 2014
Max and Bob completed the extension on time and within budget. There were no hidden extras and despite Bob being on holiday for two weeks, Max worked hard and lon. The extension is 6m x 5m. There were issues with Building Control which Max sorted out and did everything to meet their requirements. The extension is built to a high standard, kitchen cabinets fitted well, tiling very good and we are pleased with the quality of their work. We are using B&M again as we are confident that although they are not tghe cheapest, the quality of their work is of a high standard. Besides, it is always a pleasure to deal with Max who is a gentleman, patient and listens to what is required.
FIXiiT
Rating: 5 out of 5
Extension Builder in Marylebone, West London
Hi, I normally undertake all types of handy man services such as; Painting & Decorating Window Cleaning Furniture Assembling Removals Landscaping Wood Flooring Electrical services and many more…
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Latest review:
Handyman- 28 Oct 2023
Did a great job. Was punctual, patient and organised. Work was of great quality. Would recommend him
ASC BUILDING
Rating: 5 out of 5
Extension Builder in Marylebone, West London
We specialise in extensions, garden rooms, patios and lanscape gardening. I myself have 20years experience in the building trade. Trades which include: Ground works/footings and drainage, Bricklaying and pointing, RSJ installation, Roofing, Screeding, Stud walling, Plastering, Guttering/fascias and soffitts, Landscape gardening, Patios/Decking, fencing and Block paving I offer a hardworking and honest days work, at fair prices and an excellent finish.
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Latest review:
Bricklaying- 13 Nov 2023
Adrian was excellent on this job. He came had a look gave us a firm date and stuck to it even though it was a days job. On the job Adrians communication was simple and took everything we spoke about on board. job was done with no issues and site was left clean. Thanks Again Adrian.
AH Builder
Rating: 5 out of 5
Extension Builder in Marylebone, West London
AH North Builder Ltd specialise in all types of building we are professional and very determined to ensure our clients expectations are met. we have worked on many different building projects for more than 10 years experience.
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Latest review:
Extensions- 13 Nov 2020
Well, I do not usually write reviews, but this time is an exception. So after getting a number of quotations, I decided to go ahead with Fredi. The process was very smooth throughout, Fredi is a great individual and a reliable professional. The plan was to build a rear extension, but working with Fredi, we decided to commission him for the patio, changing all house flooring, kitchen, and two bathrooms. All have been delivered to completion with top-notch results. Most importantly, we have now a new family friend...Fredi the builder!!.. my kids say :)
Liskerrin Limited
No reviews yet
Extension Builder in Marylebone, West London
Liskerrin is a multi-disciplinary property and construction company. Based in London, we specialise in small to medium sized fit-out projects in commercial, retail and residential sectors. With experienced in-house designers and project managers, we offer a complete service from initial concept design to construction on site.
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Stones the Roofing Specialist
Rating: 5 out of 5
Extension Builder in Marylebone, West London
Hi, I am Matthew, the site director. We are committed to maintaining our 29 year exemplary reputation for having a reliable and sincere company that radiates professionalism. Both management and operatives are highly trained, qualified specialists allowing us to adapt to the modification and addition of advanced techniques. Stones provide a comprehensive range of ROOFING SERVICES, LOFT CONVERSIONS AND EXTENSIONS to our domestic and commercial clients at a vastly competitive rate.
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Latest review:
Roofing (Pitched)- 12 Feb 2017
An excellent job received. Matthew put in a real shift during the day and the work was completed to an excellent standard. After several years and several builders our leaks seem to be repaired. Would highly recommend.
chins design and build
No reviews yet
Extension Builder in Marylebone, West London
We undertake all manner of building and renovation work, having worked on a vast variety of jobs a professional, seamless and multi-trade service, for all domestic projects from , extensions, renovation, refurbishment and to fully finished houses, all tailored to meet our clients’ specific requirements. professional construction company covering South London and Greater South London.
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moonlight builders ltd
Rating: 5 out of 5
Extension Builder in Marylebone, West London
My name is Josh and I build from the ground through to the roof. All domestic and commercial builds covered with guarantee. Our service is second to none we value and take pride in what we do to complete all details finely. We have been building and refurbing now for many years, timekeeping is key. Friendly and most importantly trustworthy. We are highly passionate in what we do, so if your looking for a difference, a job which brings a smile and a warm heart with a professional finish.
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Latest review:
Bathroom Fitting- 12 Jan 2023
Very nice and kindly man
DRS construction
Rating: 5 out of 5
Extension Builder in Marylebone, West London
we are builders who construct the dreams of others. we have the experiece as cscs skill worker about 5 years now doing our own work contact us if you want to get good work experience
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Latest review:
Plastering- 23 Sep 2025
These guys are superb. Came to look at the job, quote & arrange a start date. Friendly and polite at all times. Knowledgeable about best techniques to use. Arrived early, worked till late to get the job done in good time and to great standard. Kept to their quoted price. Highly recommend
SC General Builders Ltd
Rating: 5 out of 5
Extension Builder in Marylebone, West London
Welcome. I am a builder with 25 years of experience. Have completed a large number of projects from small jobs to major projects such as extensions, loft conversions and full refurbishments, residential and commercial. Excellent quality for reasonable price guaranteed. Professional, reliable, affordable. Hassle free service. We cover all aspects. Fully insured. Thank you. Seb
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Latest review:
Conversions - General- 16 Jun 2024
Excellent communication Good price Did exactly what he said he would do and gave advice on other work that we were doing ourselves Really nice guy Very pleased with his work Would use him again

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.