Extension Builders in Barnet, Greater London

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4 (17 reviews)

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Some of our top rated extension builders in Barnet, Greater London

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Prime contractors
Rating: 5 out of 5
Extension Builder in Barnet, Greater London
Prime contractors have been in the construction industry for about 25 years which includes domestic and commercial projects. Some of the domestic projects have been double extensions, loft conversions, house refurbishments and other small internal and external works which also include flat roof and cladding. Commercial projects have been from building double extensions and demolition having worked as a supervisor and manager.
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Latest review:
Conversions - General- 17 Apr 2026
A great experience. Work was completed quickly and to a good standard with an unexpected extra (sorting out the electrics for a light in the crawl space). Most tidy builders I have ever employed. Quick responses and good communication. I'd happily use Prime Contractors again
Radu Mutescu
No reviews yet
Extension Builder in Barnet, Greater London
I'm qualified electrician I do domestic and commercial work
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London Roofing building ltd
No reviews yet
Extension Builder in Barnet, Greater London
London Roofing Building Ltd are a Trustmark accredited Company, With over 35 years’ experience in extensions , loft conversions, and structural alterations and generally building and house renovations. All our projects are run to a highly professional standard with communication as an essential aspect throughout each and every project. We are proud members of the Federation of Master Builders.
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Alex Mihai
No reviews yet
Extension Builder in Barnet, Greater London
Hello! I have been working in this industry for over 10 years, having experience on building sites and on privat jobs aswell. I also do loft extensions , house extensions , roof refurbishment, groundwork and finishing touches to garden patios!
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Envisionbrickwork&construction
New on MyBuilder
Extension Builder in Barnet, Greater London
We are bricklaying and construction specialist focusing on renovations and extensions
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B&S CONSTRUCTION GROUP LTD
New on MyBuilder
Extension Builder in Barnet, Greater London
Built on Quality. Finished with Pride. At B&S CONSTRUCTION GROUP LTD we are a london-based construction company specialising in [Extensions / Renovations / Painting & Decorating / General Building]. With over years of hands-on experience, we handle every project as if it were our own home — from first cut-in to final clean-up. No subcontractor headaches, no hidden costs. Just skilled tradesmen, premium materials, and a finish that lasts. Whether you need a single room refreshed or a full property transformation, we provide free, detailed quotes and honest advice from day one. Fully insured & guaranteed work.
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Naaz builds
New on MyBuilder
Extension Builder in Barnet, Greater London
Looking forward to make you feel free from hassles.
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NSL Sons & Co
No reviews yet
Extension Builder in Barnet, Greater London
NSL Sons and Co – Expert handyman and repair services you can trust. Fast, reliable, and high-quality work for every home and business.
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MM&S Builders ltd
No reviews yet
Extension Builder in Barnet, Greater London
Remodelling or renovating your kitchen, bath, or home is serious business – it can not only boost your property's market value and curb appeal, but it can also, more importantly, add to your overall comfort and happiness. After all, who wouldn't want a little extra room or living space? With over 15 years of experience in the industry, we can handle all kinds of building work. We can help you not just with kitchen and bath remodelling, but loft conversions, roofing, and all kinds of home extensions as well. With my expertise and vast experience, I can offer advice and let you know what might be the best approach to your home project. I’m We always complete our jobs properly from the start to finish. Our remodelling or renovation projects commonly involve adding or removing walls and doors, hardwood or concrete floor installations or replacements, roofing, room extensions, and more. At the end of each job, we make sure everything is clean and tidy. Please take a look at some photos of our more recent jobs on my profile. Do get in touch so we can schedule a site visit as well as discuss the next steps for your home project. I look forward to hearing from you.
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London Property Services
No reviews yet
Extension Builder in Barnet, Greater London
I have been a general builder for over 20 years, we like to take on extensions, interior plastering and exterior rendering, drive ways, patios and garden walls as well as fencing. We treat houses like our own house leaving them clean and tidy to the best standard.
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Ajazi construction limited
No reviews yet
Extension Builder in Barnet, Greater London
Hello and welcome to ACL (Ajazi Construction Limited) ACL is a professional construction business which is located in London. All the work carried out by Ajazi Construction is of the highest standard and we have been successfully completing work for satisfied clients in London Ajazi construction ltd provides high quality & affordable service. ALL BUILDING WORK UNDERTAKEN New Builds Loft Conversation Extensions Renovations Carpentry work Kitchens Bathrooms
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Annabaffer pierre
No reviews yet
Extension Builder in Barnet, Greater London
I am a head working individual no jobs to big or to small to handle from St Lucia love to play football
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Tosum Sardeshi
No reviews yet
Extension Builder in Barnet, Greater London
I a director of my own limited company that have been working in the building industry since 2004. I have studied carpentry and joinery and hold a city and guild certificates for three different levels. I am trained as a SMSTS for almost 15 years, temporary coordinator, PASMA, first aider, working at hight etc. I have worked on different project with big and small Fromm £ k to £1 million runing day to day project with all tasks risks, method of works and all work regulations. Reding all different drawings and applying this on site. I also worked on tools like a carpenter, rsj installer, ground work like underpinning, slabs, first and second fix all sort of carpentry and handy man. Partiion, door installation, roof work, roof dormers, lofts, kitchen installation,floor installation, skirting etc. I have an humongous knowledge and experience on most of building work on general, Any work is good for me big or small.
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ABG Builders Ltd
No reviews yet
Extension Builder in Barnet, Greater London
ABG Builders we do all sorts of building projects and have been running since 2006 we specialize in extensions from foundation to finish we make sure our costumer achieves their dream home. Free quotations
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ASECO Electrical Solutions
Rating: 5 out of 5
Extension Builder in Barnet, Greater London
I'm a qualified and self employed electrician with over 10 years experience in electrical industry. I specialise in all aspects of domestic and commercial installations. With me you will get high quality standard of work and reliable services at competitive price.
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Latest review:
Electrical- 29 Apr 2022
Did really great work for a fair price. Will definitely use again. Very informative and he helped get plugs in the right place
S.U. Construction LTD
No reviews yet
Extension Builder in Barnet, Greater London
Here at S.U Construction Ltd we cover all aspects of Property Refurbishment in Greater London and surrounding areas. We offer the highest quality services so that our customers are fully satisfied and happy with the work completed. Our well established business has been built on the foundation of providing 100% customer satisfaction with the goal of turning your dreams into reality. Renovations Interior/ Exterior Decorating Bathroom Refurbishment Kitchen Fitting Painting Extensions Loft conversions Tiling Flooring Plastering Partition Walls Damp Proofing Please get in touch for a free no obligation quote and a competitive price. Our friendly team are more than happy to answer any queries you may have.
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Top rated Extension Builders

Our Extension Builders in Barnet, Greater London, are rated 4 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 Barnet, Greater 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 Barnet, Greater 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 Barnet, Greater London who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Barnet, Greater London?

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

Find extension builders in Barnet, Greater London with MyBuilder

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

Step 2: Compare different extension builders in Barnet, Greater London

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

Step 3: Hire Barnet, Greater London extension builders with confidence

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

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

What to ask a Barnet, Greater London extension builder before hiring?

Before hiring an extension builder in Barnet, Greater London or extension building company in Barnet, Greater 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 Barnet, Greater London?

An extension builder in Barnet, Greater 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 Barnet, Greater 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 Barnet, Greater 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 Barnet, Greater 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 Barnet, Greater 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 Barnet, Greater London

Can an extension builder in Barnet, Greater London help with planning permission?

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

Many Barnet, Greater 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 Barnet, Greater London help with materials and finishes?

Yes, most extension builders in Barnet, Greater 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.