Extension Builders in West London

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (21 reviews)

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Some of our top rated extension builders in West London

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MYCO Contractors Limited
Rating: 5 out of 5
Extension Builder in West London
I am an experienced and fully insured builder. On average I and my team build and renovate 5 extensions per year. Our current or old clients are always ready to share positive feedback about our work. We work off the ready plans which are usually prepared by the clients themselves and approved by the local authority. As of now (30/03/2023) my availability to start the new project is late April or early May. Please get in touch and I will be happy to assist.
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Latest review:
Extensions- 4 Aug 2020
On a cold November evening, Tony and his team turned up to provide a quote and within a week this was received. The quoted price came in the middle of the pile, which was a good start and aligned closely to the ballpark figure I'd received from a friend who was also in the trade. We then visited a site they were finishing off, and Tony had the confidence to ask us to speak to the client without him there and they gave us the confidence to proceed. They started in January 2020 and rapidly moved through the works and engaged closely with my architect, Structural engineer and building control and proceeded based on their recommendations strictly. We lived in the property as build progressed and the team ensured that the site was secure every evening and we were safe. As COVID-19 hit and we went into Lockdown, the team continued to come and work (we were separated from them as the house was boarded up) and the only challenge was getting supplies. Tony scoured all over London, picking up items as best as he could and work continued. Once they'd broken through into the old part of the house they continued to progress rapidly and showed utter professionalism. The team lead's attention to detail is impressive, and he gave great recommendations on what would be the right approach when we were laying out features such as window sizing and lighting. The standard of work is excellent and I would highly recommend them.
Redmark Contractors Limited
Rating: 5 out of 5
Extension Builder in West London
Redmark Contractors Limited have over 10 years experience, and with many years experience in the building trade. We are a professional team are reliable builders operating in London and the wider area. We take great pride in all work which we undertake, taking great care to make sure that our client’s needs are met in a meticulous and professional manner.
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Latest review:
Extensions- 27 May 2025
They helped build me two houses and were always putting their best foot forwards. Bhupinder and his team are lovely, and are now like family to me. They have a bright future ahead for themselves and for the clients they look after.
CONSTA Construction Limited
Rating: 4.6 out of 5
Extension Builder in West London
CONSTA Ltd - small construction company based in London, and characterises in flexibility to complete various jobs . There is list of different small or awkward completed jobs in our portfolio as well as more significant projects as loft conversions, extensions, full house reconstructions, new build and Passive House construction as well.
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Latest review:
Extensions- 29 Aug 2021
Communicated well at the start with reasonable cost. work was done well but the finishing was not so great as expected. The end cost was very expensive. Charged by the hour, the team were very slow which was upsetting to see me pay for time where they sat around not doing much. Ensure to agree fixed price. Communication after job is poor, double glazing has warranty which now not being able to communicate with kostas having to pay to get things done that should be covered in warranty. Central heating give huge problems. Do not use for big jobs
HaliBuild
Rating: 4.7 out of 5
Extension Builder in West London
We have been working as subcontractors for over 15 years now and decided it was time to branch out on our own, hence you find us on MyBuilder, We are eager to get some work done and some positive feedback to go along.
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Latest review:
Extensions- 26 May 2021
Ali Revani at Halibuild provided us with a quote which we accepted. 3 days before the job start date Ali Rezvani called and explained that they had under priced and they would want another £3000 to start the contract. Ali Rezvani then started the job but again admitted that they under priced the job and walked off the site several months into the project after the following major quality issues which needed to be addressed: Pouring the foundations in the wrong place, building the extension in the wrong place, building the roof incorrectly, installed roof steels in the incorrect position, built the extension rear wall too high, the plumbing to the boiler needed to be redone, all the plastering has had to be redone, skirtings needed to be redone, staircase had to be rebuilt. The list goes on and is 40+ points long. This has been a terrible experience and we face serious losses and a stressful dispute."
Bogdan Pana
No reviews yet
Extension Builder in West London
TOP QUALITY MAINTENANCE & CONSTRUCTION delivers internal and external works, adapted to our clients’ needs and specifications, providing top quality maintenance, refurbishment and repairs, all work being executed by our skilled and experienced team of technicians.
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Marble Line Interiors Ltd
Rating: 5 out of 5
Extension Builder in West London
Hi, I’m Ivan from Marble Line Interiors Ltd. We specialise in plumbing, heating, bathrooms, and property refurbishment across London and the surrounding areas. We take pride in delivering high-quality workmanship, clear communication, and reliable service from start to finish. Whether it’s a boiler installation, bathroom renovation, decorating project, or general property improvements, every job is completed with care and attention to detail. We provide free quotations and honest advice, and we’re fully insured for your peace of mind.
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Latest review:
Gas Work- 26 Feb 2024
Ivan and his colleague provided a very good service at a competitive price. They completed the job on time and left the site in a tidy state. Happy to recommend Marble Line Interiors
Castle view construction Surrey Ltd
No reviews yet
Extension Builder in West London
Castle view construction Surrey Ltd is a building and refurbishment company delivering high quality construction services across residential and commercial projects. We specialise in full property renovations extensions structural works fit outs and maintenance
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JK Building Services
Rating: 5 out of 5
Extension Builder in West London
JK Building Services estabileshed in 1998,has build a solid reputation for providing quality work at affordable prices. We are specialist in house extensions,,renovations, full refurbishments, brickwork specialists ,all general building work, structure works like construction of roofs, dormers , opening load bearing walls interior and exterior and installing steels . Also we offer welding services to our lovely clients from welding big steels on site to small household items too:)) jkbuildindservicescouk *review* Lindsey : Jacek was brilliant. He is very professional, friendly, knowledgeable, tidy and made great recommendations. Jacek is talented in a lot of areas. Very refreshing to work with someone like him. We've already hired him again for bigger jobs. Highly recommend him.
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Latest review:
Conversions - General- 11 Sep 2026
I am delighted with my new cast iron Victorian air bricks with grills! Jacek took the old ones out and inserted the new ones. The job is extremely neat and the area left completely immaculately. A few neighbours have taken his number for more work. You will find Jacek extremely polite and amiable, professional, hard working and very knowledgeable about his particular trade. His price was competitive and I would have no hesitation in recommending him. I will be hiring again for other structural work. A great professional find!!
All in one builders
Rating: 5 out of 5
Extension Builder in West London
At All In One Builders we take pride in being your trusted partner for all your construction needs. With a wealth of experience and a commitment to excellence, we specialise in a wide range of building services tailored to meet your unique requirements.
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Latest review:
Akash made sure the job was complete exactly how he said it would be, he provided reliability during the installation of our kitchen and answered all questions very professionally. The builders were well aware of the conversations my mother and I had with Akash and so put our mind at ease. The installation itself was very quick (the tear down was very much completed in a few hours) and installed over the weekend. They were very hygiene aware and set up a cover between the kitchen and the rest of our house and didn’t disrupt our home living. They cleaned up before they were gone to very high standards without us even asking them too, all I’m sure is due to Akash’s excellent organisation skills.
Sebastiano Vuksani
Rating: 5 out of 5
Extension Builder in West London
Build your dream with SV building construction ltd Regards
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Latest review:
Extensions- 30 Jan 2023
I had the pleasure of having them carry out a single story extension and fibreglass new roof of my property. I found they always turned up when specified and carried out fantastic quality work for a competitive price. Not being a builder you have to place trust in a person / company. They always made sure that we were happy keeping us updated with the project every step of the way. They were kind and considerate to our neighbours making sure they were not loud early in the morning or late in the evenings making the whole process run smoothly. I can not stress enough how great these guys are. Thanks
Rcm Buildrs
Rating: 5 out of 5
Extension Builder in West London
RCM Builders is an insured construction company which offers a multitude of services. Loft conversions, extensions, painting, plastering, fencing, building renovations, and bricklaying are a few specialities we covers. We have over 28 years worth of experience and are well versed in providing high quality work, great customer service, great costumer satisfaction and great communication.
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Latest review:
Conversions - General- 7 Mar 2023
Have completed the job extremely well. Did a new door opening. Door fittings and plaster work . Very good finish. On time. Polite. Very pleased. Would hire again.
Dominik Dudziak
No reviews yet
Extension Builder in West London
I am a skilled builder with many years of experience. If you are looking for someone to plaster your kitchen, bathroom, or other room, please do not hesitate to contact me. I am happy to help.
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shalom property development ltd
Rating: 5 out of 5
Extension Builder in West London
Shalom Property Development ltd is a small construction company based in the Croydon area. We specialize in property refurbishment, house extensions, loft conversions, garage conversions, etc. We also undertake projects like plastering, painting/decorating, electricity, plumbing, tiling, flooring(laminate, wood, bamboo), bricklaying.
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Latest review:
Plastering- 6 May 2025
Amazing guys. Hardworking, tidy, professional. They worked in our house for 3 months and we were super happy with the work and everything. We invited them to do more work later on. 100% probably the most sincere and trustworthy builders we met. Only them. No one else from now on.
Bricklayer
Rating: 5 out of 5
Extension Builder in West London
Brickwork . New build, extension . Garage
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Latest review:
Bricklaying- 10 Jul 2023
I am very pleased with the work done Excellent clean job Mr Bicol has carried out
M&V Fusion LTD
Rating: 5 out of 5
Extension Builder in West London
Jobs at high standard finish . Fast and reliable .
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Latest review:
Electrical- 22 Sep 2018
Valentin was fantastic. He was efficient and professional. He did a fantastic job and even cleaned up after the job. He was polite, friendly and knew exactly what he was doing. I will definitely be getting more work done by him and have even sent him to my parents house today after finishing my job, to get quotes for other work. Thank you for helping me out today. Much appreciated
R Craft Construction
Rating: 5 out of 5
Extension Builder in West London
Instagram : @rcraft.construction R Craft Construction Quality craftsmanship. Reliable service. Built to last. R Craft Construction is a professional construction company based in London, specialising in high-quality building and carpentry services for residential projects. From rear and side extensions, loft conversions and full refurbishments to roofing, structural alterations, carpentry and general building works, we manage projects with a strong focus on quality, attention to detail and customer satisfaction. We understand that every project is different. That’s why we work closely with our clients from the initial idea through to completion, providing practical solutions, clear communication and a professional service throughout. Our experienced team takes pride in delivering work to a high standard, combining traditional craftsmanship with modern construction methods and quality materials. Whether you are looking to extend your home, convert your loft, renovate your property or simply improve and add value to your space, R Craft Construction is here to help turn your plans into reality. Your project. Our craftsmanship. Built with care.
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Latest review:
Ramos have done a nice project with his ideas on dead-end Roof with resin gutter. Very honest person and professional. Roofs has been done 5 months ago no leaks nothing.

4.2

Top rated Extension Builders

Our Extension Builders in West London, are rated 4.2 out of 5 based on 21 reviews from customers like you.

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What types of services are offered by local extension builders in 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 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 West London who are available and interested can respond to your post.

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

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

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

Find extension builders in West London with MyBuilder

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

Step 2: Compare different extension builders in West London

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

Step 3: Hire West London extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in 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.

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

What to ask a West London extension builder before hiring?

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

An extension builder in 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 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 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 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 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 West London

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

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

Many 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 West London help with materials and finishes?

Yes, most extension builders in 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.