Extension Builders in Holborn, 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 Holborn, West London

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Court's Home Extensions
Rating: 1 out of 5
Extension Builder in Holborn, West London
With nearly 20 years experience i joined the building trade at 16, going into bricklaying very soon after. I have worked for 4 very well known east London extension company and have built an excellent portfolio through customer recommendation. I have accumulated an excellent team of tradesmen ensuring consistent high standard finishes
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Latest review:
Extensions- 17 Jan 2018
A Total disappointment Ricky agreed to install a porch and roofing. He advised us to install new pvc doors agreeing to fit the roof after. This started mid November with a promise to be completed before Christmas. On his instruction we paid other workers to complete the preparation works and then the morning of the Job he sent a text message advising that he will no longer be able to attend the job. Thankfully we were able to find a local reputable roofer -plasterer-tiler who completed the work to a very high standard I feel very let down as I had put total trust in his promise to complete the work. Unfortunately based on this I cannot confidently recommend Ricky to a friend family, or anyone else.
London formwork and groundworks Ltd
Rating: 5 out of 5
Extension Builder in Holborn, West London
At London Formwork & Groundwork, we are delivering high-quality construction services across London and the surrounding areas. With years of experience in the industry, our team of dedicated professionals is committed to excellence in every project, ensuring that we meet and exceed our clients' expectations.
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Latest review:
Groundwork & Foundations- 24 Jul 2026
A great team you can trust. I’m a cautious customer, but they immediately put us at ease with their professionalism and obvious experience. We needed a concrete slab pumped into a long, narrow extension with access from one side only, and they managed the entire process smoothly from start to finish. The result was a perfectly level, high-quality slab. Thank you!
Gilroy Building Services Ltd
No reviews yet
Extension Builder in Holborn, West London
We are a general building company who pride ourselves on quality workmanship and providing each client with a great all round building service. We carry out both commercial and residential contracts, having worked for companies such as Taylor wimpy, Simcott projects, Michealis Boyd, Witherslack group and others. We provide quality, skilled, certified trades people with a wealth of experience so you can rest assured the work will be of a high standard. Get in touch today for a free quote!
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Haddi
No reviews yet
Extension Builder in Holborn, West London
Hello I'm a professional handyman, glazer, aluminium windows, cladding
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2A CONSTRUCTION LTD
No reviews yet
Extension Builder in Holborn, West London
2A Construction We are a premier construction and renovation company based in the heart of London. With a passion for transforming spaces and a commitment to excellence, we deliver high-quality construction and refurbishment services that elevate residential and commercial properties. Our team of skilled professionals brings a wealth of experience to every project, ensuring that each client's vision is brought to life with precision and creativity. Our services : Full Home Renovations; Home Additions and Extensions; Kitchen Renovations; Bathoom Renovations; Loft Conversions; Roofing and Re-Roofing Services.
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Property Makeover Ltd
No reviews yet
Extension Builder in Holborn, West London
For all property needs, there is Property Makeover Ltd. With our wealth of experience and in-depth expertise we are in a position to provide home improvement and property makeovers to the highest possible standard.
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ORO projects
No reviews yet
Extension Builder in Holborn, West London
We cover everything related to Refurbishments, extensions, loft conversion , planning. We created a new company with new management, better environment and lots of planning. Our past project costs range from simple day to day maintenance on domestic and commercial properties up to private clients services with project cost over 250k.
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Beacham Architects
No reviews yet
Extension Builder in Holborn, West London
We help home owners extend and improve their homes to suit their needs and dreams. We are design-led and specialise in extensions, loft conversions and basements all around London with budgets of £50k-£400k. Good design improves lives and adds value, just ask our clients. Our extended team includes expert ARB registered architects, interior designers, structural engineers and party wall surveyors. Contact Mike for a tailored and customisable service quotation, the first consultation is free!
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PM GAS LTD
Rating: 4.6 out of 5
Extension Builder in Holborn, West London
Our professional heating and plumbing engineers are nearby and ready to assist. We are fully certified and gas safe registered company. Boiler Replacement,Types: Plumbing, Heating, bathroom fitting, comercial gas works also carried out.
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Latest review:
Gas Work- 7 Oct 2025
This provider took my money but never attended my property or carried out the work (a report on already completed plumbing works). All he had to do was write a report to say that the repair works were complete. On the day he was due to attend he never let me know he was on his way or that he wanted to come early morning. Then he went to a nearby apartment a few streets away and said he had attempted to come so it was my fault. Then he said he would do the report remotely I must send him pictures, after sending him pictures he said he wanted to visit site so we were back to him making an appointment which of course he really did not want to do. 3 months later no sign of my money or a very simple report that a child could have done. He also has not returned my money (£120). I can now see why he insisted he be paid in advance because he is a time waster with no confidence in his own abilities hence payment in advance, so that when he disappoints the customer he can still get paid.
UNDERWAY CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in Holborn, West London
Here at Underway Construction we cover all aspects of building from extensions, conversions and refurbishments to decking, oak framing and hanging doors. Specialising in first and second fix carpentry with over 10 years experience we work alongside architects and engineers to ensure our clients are always provided a professional and reliable service.
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Latest review:
Carpentry- 3 Jul 2023
Henry did a great job installing an internal door for us. Good quality job, kept everything clean and tidy, and smooth communication.
Shefit
Rating: 5 out of 5
Extension Builder in Holborn, West London
we build all types of walls,houses,extension, porches, garden walls etc
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Latest review:
Bricklaying- 14 Apr 2026
Prior to starting the job, Shefit was very responsive to my emails and WhatsApp messages and was very easy to communicate with. I left Shefit detailed instructions of where to position the walls we wanted constructing for our small extension as I was not going to be there when he arrived. I returned later that afternoon to find the job well under way - he had even sent me a short video of the work in progress - yo find everything had been done as per my instructions. The team worked all day and finished the job in about 8 hours - hardly stopping for a break it seems and refusing any attempt by my wife to ply them with coffee and tea. They left the site clean and tidy were incredibly polite and respectful - one of them even asking if they could use the toilet, which of course they could! I would recommend Shefit and his team wholeheartedly. The price was reasonable and the job was done quickly and cleanly.
Fm building contractors ltd
Rating: 5 out of 5
Extension Builder in Holborn, West London
FM Building Contractors Ltd is London based builders HOME EXTENSIONS PROFESSIONAL BUILDING & BRICKWORK SERVICES Providing a range of building services from walls and block paving, extensions and conversions to complete new builds, we only work with highly trusted and experienced tradesmen registered with the appropriate bodies. FM Building Contractors Ltd is proud to have earned a reputation for fast and efficient turnaround, reliability, transparency and professionalism.
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Latest review:
Groundwork & Foundations- 19 Jul 2024
Great job very efficient will consider for further larger projects
Brooklyn Elite Builders LTD
No reviews yet
Extension Builder in Holborn, West London
Hello! My name is Broklin, and I am a skilled bricklayer with over a decade of experience in the construction industry. I specialise in delivering high-quality bricklaying services for both residential and commercial projects. My commitment to craftsmanship, attention to detail, and dedication to customer satisfaction set me apart. Whether you need new construction, repairs, or renovations, I am here to help bring your vision to life. I look forward to the opportunity to work together and contribute to your next project! Please feel free to reach out with any questions or to discuss your needs. Thank you
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CASTLE PEAK ROOFING LIMITED
Rating: 5 out of 5
Extension Builder in Holborn, West London
Welcome to CASTLE PEAK ROOFING LIMITED, your trusted partner for top-quality roofing solutions. Our experienced team delivers expert installations, repairs, and maintenance, ensuring your home or business is protected with the highest standards of craftsmanship and materials. Choose CASTLE PEAK ROOFING LIMITED for reliable, durable roofing you can count on. Expert in GRP FIBRE GLASS ROOF and TORCH FELT BEST WISHES
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Latest review:
Roofing (Flat)- 10 Dec 2024
Very happy with their professionalism and work that was carrierd out was satisfactory
XL design Studio ltd
No reviews yet
Extension Builder in Holborn, West London
XL Design Studio is an emerging practice, working on small carefully crafted residential projects that creating pleasurable and practical space for people to enjoy. We believed blending clever design elements could maximise usable space.
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PK Decorating & Building Services LTD
Rating: 5 out of 5
Extension Builder in Holborn, West London
At PK Decorating and Building Services we are committed to deliver the highest standards of quality in everything we do.Make the most of your property with high quality work, done the way it should be; fantastic workmanship, client communication and ensuring everything is clean and tidy when the work has been completed.While PK Decorating and Building Services is based in South London, we can deliver our services across London and the surrounding areas.If you have any questions please contact us
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Latest review:
Conversions - General- 14 Jul 2026
PK decorating and building were professional and reliable. The craftsmanship was excellent. The manager and foreman managed job very well. I would highly recommend them.

4.1

Top rated Extension Builders

Our Extension Builders in Holborn, 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 Holborn, 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 Holborn, 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 Holborn, West London who are available and interested can respond to your post.

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

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

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

Find extension builders in Holborn, West London with MyBuilder

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

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

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

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

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

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

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

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

An extension builder in Holborn, 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 Holborn, 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 Holborn, 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 Holborn, 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 Holborn, 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 Holborn, West London

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

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

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

Yes, most extension builders in Holborn, 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.