Extension builders in Canonbury

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.5 (17 reviews)

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Some of our top rated extension builders in Canonbury

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rfi builders ltd
Rating: 5 out of 5
Extension Builder in Canonbury
Hi! My name is Rifat, I’m the proud owner of RFI builders. I have 30+ years experience in the construction industry having done jobs in, brick laying, plastering, flooring, painting, loft conversions, extensions and many more!
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Latest review:
Plastering- 4 Oct 2024
Mr Rifat did an excellent job for plastering rooms and i would recommend him to everyone highly. The work he has done is to a very high standard and completed in 3 days. His quote was very helpful and comprehensive and he was helpful and very kind and calm. He did not take a break from doing the work, even though i told him to take a seat for 5-10 minutes. He is a very hardworking person. I think anyone to catch him to do a job for themselves is very lucky. I recommend him to everyone because he knows how to do good job.
Don & Dorian Limited
Rating: 5 out of 5
Extension Builder in Canonbury
We are Don & Dorian Limited. We are a family run business based on the corner of Central London in Islington. We have a combined experience of 40 years between us. We specialise in interior renovations, loft conversions, extensions and new builds. We usually undertake a project fully from start to finish as we have many in-house trades from plumbers and electricians to carpenters and painters. We pride ourselves with the quality of work we produce and thoroughness.
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Latest review:
Extensions- 17 Feb 2022
Don and Jake were terrific. Nothing was too much trouble and they provided work to a very high standard. They were extremely competent and I cannot recommend them highly enough. I have done many building projects and they were the first builders that I didn't fall out with!
adam lloyd construction ltd
Rating: 5 out of 5
Extension Builder in Canonbury
At Adam Lloyd construction we specialise in high end refurbishments but we also undertake small works and maintenance from decorating to landscaping we have excellent tradesmen in-house
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Latest review:
This carpenter is a plywood maestro! My wardrobes are a testament to their craftsmanship – sturdy, stylish, and a definite upgrade from my previous cardboard chaos. Would highly recommend for a wardrobe transformation that's as solid as it is delightful. ⚒️👌 Top notch, class A stuff 👍🏻
PLANNING APP LTD
Rating: 5 out of 5
Extension Builder in Canonbury
We create architectural drawings. We are specialised in applications for planning permission and building regulations and co-operate with local structural engineers for structural calculations, party wall surveyors and building companies. Our projects include extensions, lofts, garages, house&flat conversions in different councils all around London. If you are thinking of extending, converting, or splitting your property do not hesitate to contact us for a free first consultation & quotation.
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Latest review:
CAD / Drawings- 23 Sep 2020
Marius has been doing a great job and put in an extra effort to ensure we were happy with the outcome. I can not recommend Marius highly enough, especially as he managed to fix an issue with the council that we had from someone else drawings. He was patient and very well prepared. Went an extra mile and gave us different ideas/options. He was flexible with timings and most importantly with price. Had by far the best quote and did an exceptional job.
I Maintain
Rating: 4.8 out of 5
Extension Builder in Canonbury
Hello! We are an established general building company with over 12 years of experience proudly serving clients throughout London. We specialise in: ✅ Full Property Refurbishment ✅ House Extensions ✅ Loft Conversions ✅ Bathroom Design & Installation ✅ Kitchen Design & Installation ✅ Plumbing & Electrical Services Quality workmanship and customer satisfaction are at the heart of everything we do. Get in touch today to discuss your project — we’d love to help!
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Latest review:
Absolutely excellent house renovation service! From start to finish, the team was professional, reliable, and highly skilled. The quality of the workmanship was outstanding, with great attention to detail throughout the project. They listened carefully to our ideas, offered helpful suggestions, and completed everything to a very high standard. The whole renovation was handled smoothly and professionally, and the finished result has completely transformed our home. We are extremely happy with the outcome and would highly recommend their services to anyone looking for quality, professionalism, and excellent craftsmanship.
Adam Favor
Rating: 4.8 out of 5
Extension Builder in Canonbury
Our business was founded to offer clients the opportunity to bring a vision to life. As a design & build business we can take your dream home concept and turn it into reality. We will provide you with design plans for your projects and thorough project management. We also have the professional, experienced and quality tradesmen that are essential to complete the construction phase of the project.
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Latest review:
Plastering- 17 Jun 2024
Adam Favor and NOVA Design & Build are a nice bunch of guys and they are reliable/helpful. However, when it came to coving, architrave and flooring, acceptable standards were unfortunately not met. Other specialists had to be brought in to re-do around 20% of the job; namely certain sections of the cornice and door architrave. In the former, a few things were below standard including: 1) not joining the friezes in the correct places, 2) cutting inaccurately, 3) leaving gaps, 4) using silicon as a filler and adhesive. For the door architrave, the wood was misaligned and not glued/nailed properly. The flooring was not laid well because there are huge gaps at times; sometimes at 1 cm. Since the kitchen has been installed, it is too late to take up the floorboards again. The most dubious thing of all in this job was the quote received for decorating which was c. 15k for 47 m2. This included plastering repairs, but ultimately the job got done by someone else to a high standard at 7k.
FM Building
Rating: 4.8 out of 5
Extension Builder in Canonbury
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.
ADJ Builders Limited
Rating: 5 out of 5
Extension Builder in Canonbury
Hello ..my name is Alfred. I, have over 12 years of experience in building site. Perfectionist in my work and ability to guarantee customer satisfaction. Hard working and ensures all deadlines and targets are met. A good eye for detail, precise and accurate at all times and will complete all work to the highest standards.My experience shows in the finish, with no visible streaks. Polite friendly and helpful.
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Latest review:
Painting & Decorating- 6 Oct 2022
Very pleased with our choice. We initially got four quotes from different builders, most of them were terrible at communicating apart from Alfred. He was very easy to work with, responsive and very careful with our brand new house. His team was hard working, tidy and fast. They completely renovated our garden from removal of old decking and gravel to setting up new fences, levelling and turfing the ground. They also removed our old kitchen, partition wall and carpet, as well as did jobs like plastering, building a wall and set up lights and shelves. We’ll surely have him back soon to work on other jobs.
Mansa Construction & Maintenance Limited
Rating: 5 out of 5
Extension Builder in Canonbury
Building Tomorrow, Today. Mansa Construction is your partner in shaping the future landscape. With meticulous planning, innovative solutions, and unwavering dedication, we transform blueprints into reality, delivering projects that stand as testaments to our commitment to excellence. From groundworks to completion, we build with foresight, ensuring that every structure not only meets but exceeds expectations, today and for generations to come. We specialise in refurbishments, renovations, and maintenance services across both commercial and residential sectors. Whether transforming existing spaces or preserving their longevity, we bring the same precision, care, and innovation to every detail. Led by a two-man team with over 30 years of combined experience, choose us to experience construction redefined, where every detail matters and excellence is standard.
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Latest review:
Handyman- 1 Aug 2025
Very professional, will use again, highly recommended
AB Building and Renovations Ltd
Rating: 5 out of 5
Extension Builder in Canonbury
Bathroom, kitchen or full renovation? One team handles every trade, start to finish. We are AB Building & Renovations, working across London and Cambridge. 7+ years. 150+ projects done. What we do: bathrooms, kitchens, tiling, flooring (LVT, laminate, parquet, herringbone), decorating, spray painting, carpentry, plumbing, patios and groundworks. What you get: one contact for the whole job, a clear quote with three price options, and £5 million public liability cover.
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Latest review:
Painting & Decorating- 13 Nov 2025
The team did a solid job on our extension. They were on time, kept the place organised, and stayed easy to reach throughout the project. The extension came out exactly as agreed and the finish looks clean. They also took care of a few extra jobs for us, including painting the exterior, laying new slabs in the garden, and putting down new grass. The whole place looks tidy and well put together now. I would be happy to use them again.
Spring Construction Solutions Ltd
Rating: 5 out of 5
Extension Builder in Canonbury
We undertake all aspects of residential and commercial building projects with regard to refurbishment and extensions. We have 45 years experience in the building trade and also working with architects and surveyors as well as managing our own projects.
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Latest review:
Restoration & Refurbishment- 25 Feb 2020
Malcolm and his team did great work on my house. The job consisted of full house redecoration, building bespoke shelving and built in wardrobes, loft boarding and installing ladder, replacing fencing and general pruning in the garden. They were able to turn their hands to all manner of jobs. Malcolm had a full team onsite every day and they finished the work ahead of schedule. At all times Malcolm was very responsive and worked hard to ensure that any changes along the way were accommodated. I would happily recommend Spring Construction and would not hesitate to use them again in the future.
Vasile Balta
Rating: 5 out of 5
Extension Builder in Canonbury
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:
Decking- 30 Sep 2026
Vasile replaced the decking on my front and back roof terraces, and I can't recommend him highly enough. His quote was competitive, and though it was several months before I decided to go ahead, he stuck to it and did an excellent job. He was flexible in working around my time schedules and the weather, and when there was some snagging to resolve at the end, he came over immediately to deal with it. He was also friendly and trustworthy throughout. Wouldn't hesitate for a moment before using him again, and neither should you - top marks.
Petro general building
Rating: 5 out of 5
Extension Builder in Canonbury
A builder that never cuts a corner and a man of his word .
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Latest review:
Extensions- 7 Mar 2025
Highly recommend! They did an excellent job on my side extension, delivering top-quality work with great attention to detail. The team was professional, reliable, and kept me informed throughout the process. I'm thrilled with the final result!
OBE BUILDING LTD
Rating: 5 out of 5
Extension Builder in Canonbury
At OBE Building Ltd we are building a reputation by providing our clients with the very best of our services,efforts and expertise.We have very good working ethic and a well balanced mutual interest.With our set up we always deliver satisfaction to both clients and ourselves the builder.So please do feel free to hire us and give us your trust. Thank you.
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Latest review:
Extensions- 25 Jul 2023
Vini and his amazing team became part of our family for the months they were working on our house! Attention to detail and great communication was a top priority for me before starting our large scale renovation, and they delivered above and beyond on every front. Vini’s team helped transform my vision into a reality - they weren’t thrown or intimidated by any of my crazy/creative ideas, and were equally ready to advise and bring constructive ideas of their own to the table, based on their years of experience. We would highly recommend Olaj Brothers as trustworthy, professional and highly skilled tradesmen.
Mark's Amazing Building Company
Rating: 5 out of 5
Extension Builder in Canonbury
Mark and his team of 8 have over 100 years of trade experience between them. Each member of the team has honed their craft in a specific trade from bricklaying to plastering, extensions to renovations. Working so close to each other and as a team, they create extensions and renovations to a high standard and always work on one job at a time to ensure a finish of high standards.
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Latest review:
Mark and his team did an amazing job on our extension. We will shout it out from the rooftops. They walked us through all aspects of the build and where so friendly and clean. If we ever extend anything else we will look them up.
Victoria Urban Contractors LTD
Rating: 5 out of 5
Extension Builder in Canonbury
we pride ourselves on being builders and contractors that are synonymous with high-quality, skilled craftsmanship. We provide a full range of building services in London, from renovation to restoration and site management. No matter how big or small your project is, our approach is always the same – focused, professional and with true attention to detail.
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Latest review:
Extensions- 18 Sep 2024
I looked at 5 quotes and was so happy to have chosen Elvis and his highly experienced team. They did an excellent job of building a new 11sq meter garden rear extension. This was a bit complicated project because it’s a listed house. Elvis and his team were hardworking, always responsive and came up with great solutions when necessary. I am very pleased with the high quality end result. I would use them again and can't recommend them enough! Great job done

4.5

Top rated Extension Builders

Our Extension Builders in Canonbury, are rated 4.5 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 Canonbury?

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 Canonbury 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 Canonbury who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Canonbury?

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

Find extension builders in Canonbury with MyBuilder

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

Step 2: Compare different extension builders in Canonbury

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

Step 3: Hire Canonbury extension builders with confidence

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

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

What to ask a Canonbury extension builder before hiring?

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

An extension builder in Canonbury 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 Canonbury 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 Canonbury?

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 Canonbury 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 Canonbury 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 Canonbury

Can an extension builder in Canonbury help with planning permission?

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

Many Canonbury 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 Canonbury help with materials and finishes?

Yes, most extension builders in Canonbury 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.