Extension Builders in Barnet

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (16 reviews)

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Some of our top rated extension builders in Barnet

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ANQ DESIGN & BUILD LIMITED
Rating: 4 out of 5
Extension Builder in Barnet
Hi there, We are team of civil/structural engineers, project managers and experienced builders being in the field for a decade now. We have full insurance policy for all our construction jobs. We provide the best of the services to our clients. So, you can totally rely on us about the services you will get. We are specialists in house renovation, extensions, Architectural services and planning permissions. We are new to mybuilder hence few review.
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Latest review:
Painting & Decorating- 17 Jun 2022
quality work for good price. Recommend to anyone looking for good work with affordable prices.
NORTH STAR BUILDING SOLUTIONS LIMITED
Rating: 5 out of 5
Extension Builder in Barnet
Established in 2010 Northstar Building Solutions are a highly successful building company specializing in exceptional residential projects. As well as covering all aspects of new build and can deliver technical expertise to the latest building designs. We pride ourselves in completing a variety of projects including affordable and high specification housing, energy centres, hotels, restaurants, community centres and a church; we are experts at Extensions, Conversions.
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Latest review:
Extensions- 2 Jan 2023
Excellent work overall. Builders were very professional, hardworking and friendly. Work was completed to a high standard and we were given updates throughout the entire process. Leo and his team were very responsive and resolved issues very quickly. Will 100% use North Star again for future work.
Lucian
Rating: 5 out of 5
Extension Builder in Barnet
I offer quality and good prices
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Latest review:
Fencing- 21 Jul 2026
Lucian arrived on time. He explained what he would do and what materials and got on with the job. A lot of shrubs to cut and clear and he tidied and swept up as he went along rather than all at the end. Fence was erected neat and secure. Job well done.
Ridgewell Roofing and Building Ltd
Rating: 5 out of 5
Extension Builder in Barnet
Ridgewell roofing and building ltd is a family owned and run business, we strive for perfection in the quality of our work , competitive pricing and customer satisfaction , no job is too big or too small , we do all types of roofing , from flat roofs in felt rubber fibreglass, pitched roofs repointing leadwork valleys and general maintenance feel free to get in touch
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Latest review:
Roofing (Pitched)- 8 Jul 2026
Really happy with the work James and the team did. From the start, James was easy to speak to, answered all my questions, and gave a fair quote. They changed our flat porch roof into a pitched roof and did a great job with the tiles, leadwork, fascia and guttering. The roof looks really good, everything was left tidy afterwards, and the whole process was straightforward. I’d happily recommend Ridgewell Roofing and Building Ltd.
North Builders LTD
Rating: 4.8 out of 5
Extension Builder in Barnet
North Builders LTD have a team of specialists which gives you quality and high standard work on Loft conversions, Extensions, Roofing, Renovation, Refurbishment. We based in London and we cover all M25. With the best quality work and proffesional prices on the market we managed to make happy a lot of costumers around London and not only. Our priority is the costumer to be satisfied, the project to finish in timeline and on budget. Contact us for free quotes.
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Latest review:
Loft Conversion- 2 Nov 2025
Full loft conversion with dorma. Blerim always asked the right questions and made really good suggestions. Very helpful and great quality. Would happily recommend him and his team.
AVOTERG Ltd
Rating: 5 out of 5
Extension Builder in Barnet
Our aim is to help clients achieve their objective on time and budget and to the highest standard. We value the good communication with the clients, and try to have as much information as possible with regards to how their project must look when completed.
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Latest review:
The job was a complete refurbishment of a one bed flat, including rewiring and re-plumbing. We would recommend Al and his team without any hesitation. From the very beginning and all the way to completion, we felt very lucky and fortunate to hire them. We found them to be very hardworking, conscientious and professional. The job was a difficult and complex one, but the team still completed within time and within budget. Al's advice made the whole process easier and we found him to be very trustworthy and honest. The end result was better than we originally hoped for and was done to a high standard.
Sebastiano Vuksani
Rating: 5 out of 5
Extension Builder in Barnet
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
Perparim
Rating: 5 out of 5
Extension Builder in Barnet
An established bricklaying business offering all aspects of bricklaying services in and around London and the south east areas. We are reliable,friendly, professionals that take pride in our work and guarantee jobs to the highest standards
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Latest review:
Great work, good communication skills very happy with the service Job got completed on the promised timescale
Vasile Balta
Rating: 5 out of 5
Extension Builder in Barnet
Thank you for reading this I’m Vas( owner of BALTA COMPLETE CONSTRUCTION LTD)from 16 started as a apprentice in construction industry, have work over the years on big projects also small ones , when I was about 30 years old whit lots of experience in house refurbishment, extensions and lofts , decided to open my business, it was the best idea I take Ower focus as a business is a hight quality service, on all projects(big or small) and the feedback from the profile prof this As a person in charge whit the projects, I’m very easy to talk to, friendly , also more than happy to sort issues out Thank you for reading this As a business ower focus is on quality, high end finishes and trat each coustumer whit respect, and live them happy after the project is finished
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Latest review:
Conversions - General- 24 Apr 2026
I recently had extensive work completed in my flat by Vas, and I couldn’t be happier with the result. The service was excellent from start to finish. Not only was the quality of the work consistently high, but the whole experience was smooth and stress-free. What really stood out was Vas’s level of skill and versatility. Every aspect of the project was handled with care and professionalism — from plumbing and new water heating pipes, to new electrics, installing a new kitchen, laying a beautiful wooden floor, renovating the bathroom, and even replacing doors with a sliding door system. Each element was completed to a very high standard. On top of that, Vas was friendly, proactive, and easy to communicate with throughout. Nothing ever felt like too much trouble, and it was clear he takes real pride in delivering great results. It was genuinely a pleasure to deal with Vas, and I would highly recommend his services to anyone looking for reliable, high-quality work. Thank you again!
Haxhi D LTD
Rating: 5 out of 5
Extension Builder in Barnet
Our company is dedicated to becoming your contractor of choice no matter the service. We pursue excellence. Our dedicated and experienced team deliver quality in a timely fashion. we provide construction services and every job schedule is completed on a “Fast Track” basis with an emphasis on quality workmanship.Our pledge to excellence and customer satisfaction has led to repeat corporate with our clients and has been the cornerstone of our growth.
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Latest review:
Haxhi and his team exceed my expectations. We did agree on a bathroom renovation which basically everything was done from scratch. He was always on time and he met the deadline of the project. I had an issue with my water pump but he managed to fix it for little cost. Also he did the tiles for me on the wall and floor with very minimum waste and he did a brilliant job. We changed the position of the basin in order to save space and we did replace it the washing machine(hidden). We are now working on my other property to renovate the bathroom. Hahxi is very professional, knows the job very well, he did coordinate with me on every step to make sure we are on the same page . I strongly recommend him for any renovation project you may have.
Jaches construction
Rating: 5 out of 5
Extension Builder in Barnet
Architectural Engineering drawings. Construction. Ground and first floor Extensions. Loft conversions. Interior design. Painting and decoration. Boiler installations.
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Latest review:
Conversions - General- 28 Jul 2023
I had Tony in to do my ballastrade, he also ended up doing a lot more work including my driveway, have recommend him to several people and all have used him, highly recommend
Shapesmakers LTD
Rating: 5 out of 5
Extension Builder in Barnet
Shapesmakers are a small construction company with combined experience of 20+ years in various construction tasks and projects. Our aim is to provide a reliable and quality for our project as well as peace of mind to your customers. We thrive on challenges of each project and exceeding expectations of our clients.
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Latest review:
Conversions - General- 24 Sep 2025
Mario carried out a great job at my apartment. He took off the wallpaper from 3 walls in the living room, plastered and painted them making them like new and carried out a small restoration project of my stairs. He’s very reliable, experienced and easy to communicate to. I highly recommend Shapesmakers
SANDAROV LTD
Rating: 5 out of 5
Extension Builder in Barnet
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
Luminous builders ltd
Rating: 3 out of 5
Extension Builder in Barnet
At Luminous Builders we bring design, build, and refurbishment together under one roof. We treat every property as a living structure — crafted with care, precision, and integrity. Whether you need a bespoke renovation, detailed interior finish, or full property transformation, our mission is simple: to deliver spaces that inspire, endure, and shine.
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Latest review:
Bathroom Fitting- 26 Feb 2026
Worst job ever. The first day he came at 10.30am started the job left at 9pm said it would take a day & a half. The next day he said he would be here at 8.30am again he came at 10.30am & his words were I’m going to finish in 2 hours maximum. By 3pm he still hadn’t finished & I heard him speaking to someone on the phone saying that he would be there in 45 minutes.then he told me he needed a part for my job & he would be a couple of hours, he came back 4 hours later without a part.Again he was here till 9.30pm. He said he had finished. I went to look and his work was bad. I complained he said he would come back the next day. the next he said he had finished & I told him I wasn’t happy he came back the next day. He tidied up his mistakes.he shaved the bottom of the door off a bit as it wouldn’t close coz of the new tiles & he left, as he was leaving he said please give me a good review. I said I’ll tell the truth & he said but the truth isn’t good. He didn’t stick the threshold back on.
Emanuel. Sh
Rating: 5 out of 5
Extension Builder in Barnet
Hello everyone My name is Emanuel. I’ve used this app for a long time as well as a few other apps. I’m a builder for 8 years now. Me and my team can do everything regarding building work such as new builds, extensions, loft conversions, sheds, patio, fencing, roofs, garden work, plasterboard , skimming, painting,everything inside the house and out If you see me as the person to work in your house, I’m more then happy to help Thank you
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Latest review:
Bricklaying- 15 Feb 2023
Emanuel was hired because he seemed knowledgeable about his trade and came across as a confident tradesman. He was punctual and worked with professionalism. He offered to advise where his input was needed. Overall I am pleased with his work and will hire him again or recommend him to family and friends.
FM Building
Rating: 4.8 out of 5
Extension Builder in Barnet
Honest and friendly company, we here at FM Building focus on complete customer satisfaction and make a promise to our clients to offer best quality services at competitive rates. All projects considered and dealt with in a professional manner regardless of the size or duration.
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Latest review:
Handyman- 12 Oct 2018
The flat was left in a very bad state after the tenants left. Marius was able to undertake all the jobs, from changing carpets, redecorate, repairs and clean up. Also gave good advice as I was not able to attend the site in person so Marius kept me updated with photos. The price was also good. Thank you. Will use these guys again.

4.2

Top rated Extension Builders

Our Extension Builders in Barnet, are rated 4.2 out of 5 based on 16 reviews from customers like you.

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What types of services are offered by local extension builders in Barnet?

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 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 who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Barnet?

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

Find extension builders in Barnet with MyBuilder

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

Step 2: Compare different extension builders in Barnet

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

Step 3: Hire Barnet extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Barnet, 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 extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Barnet extension builder before hiring?

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

An extension builder in Barnet 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 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?

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 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 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

Can an extension builder in Barnet help with planning permission?

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

Many Barnet 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 help with materials and finishes?

Yes, most extension builders in Barnet 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.