Extension Builders in Canonbury

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (18 reviews)

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Some of our top rated extension builders in Canonbury

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Gjat construction ltd.
Rating: 4 out of 5
Extension Builder in Canonbury
We provide high quality services with bathrooms and kitchens to stand out. We supply high standard services at affordable prices. Experts in house, kitchen and bathroom renovations with more than 10 years of experience. Contact us for free estimates.
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Latest review:
Bathroom Fitting- 22 Apr 2023
Younger brother Anti was a professional and I would hire again but beware of the elder sibling as his workmanship his poor, here is a list:- 1) the cupboard fitted under the stairs was misaligned and the hinges are loose. Paint job was poorly finished too. 2) cupboard fitted across the boiler was all bent. Anti came and fixed it. 3) varnish across door and skirting boards were done once and therefore have an uneven spread 4) the floorboards did not have enough glue placed in certain areas so it creaks 5) grout in some time are missing 6) really poor sealant work on the bathroom 7) broke my £2000 TV and then hid the evidence. I only found out after placing the furniture back in its place. In contrast Anti did a good job in fitting the radiator. If you can Illicit promises of Anti only completing the job without the older the brother then go for it or else give them a wide berth.
Baho Builders Ltd
Rating: 3.9 out of 5
Extension Builder in Canonbury
Baho Builders Ltd specialise in all types of building we are professional and very determined to ensure our clients expectations are met. we have worked on many different building projects for more than 10 years experience. We put our heart and soul into our work, ensuring that your project is worth every pound you spend on it!
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Latest review:
Landscaping- 4 Oct 2024
One word to define this 'company' COWBOY builders. Numerous issues one after another. Had to get 2nd/3rd opinion on their work to make sure I wasn't being fobbed off. Conducted loads of research which meant left being uneasy especially as a large chunk of payment was made after only 1 day of work when in fact payment was due end of completion. 1- Underestimating material costs 2- Slabs off the walkway coming loose within 2 months of being put down 3- Ignoring attempts of rectifying the flawed job 4- walkway was meant to be clear of grass and strictly shingles but grass/weed still appearing. 5- Forgot to state ground levels would be raised then creating a lie saying I had been told 6- denying and ignoring the obvious Wouldn't trust the reviews being left here and definitely wouldn't use or recommend them to anyone. Have decided to give up on trying to get them to fix their shoddy job and find someone else to fix their mess Correction - you was aware & agreed with mat delivery
E&E construction
Rating: 5 out of 5
Extension Builder in Canonbury
With over 18 years of industry experience, our construction company specializes in high-quality house extensions and loft conversions across London and Essex. We are committed to transforming homes with expert craftsmanship, tailored design solutions, and reliable project management from start to finish. Whether you're looking to expand your living space, increase property value, or bring new life to your home, we deliver outstanding results that reflect your vision and meet the highest standards of construction excellence.
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Latest review:
Fencing- 9 Sep 2023
Ervin was polite, communicated well and worked hard to get the job done. Would hire again.
Edward Fox Building
Rating: 5 out of 5
Extension Builder in Canonbury
We are a family company in which we have been in the industry for over 20 years. We specialise in all aspects of construction such as renovations, loft conversions, new builds, and extensions. We like to give our clients affordable and competitor rates and work closely with the to insure the works and their ideas are turned into reality and make it as stress free them as possible.
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Latest review:
Restoration & Refurbishment- 31 Jul 2023
We put the ad up on Saturday morning, Ed popped over in the afternoon and gave us a quote and the job was completed on Monday! Super quick process. For a job that was causing us stress and we quickly realised we couldn’t do ourselves, Ed came in and sorted it really quickly as well as giving us advice on next steps for our redecorating. Will be contacting again when we need further help!
P R Henry
Rating: 5 out of 5
Extension Builder in Canonbury
PR Henry Building Ltd. Member of Federation of Master Builders. 30 years of experience in the building industry with a strong commitment to meticulous attention to detail. Our forte lies in comprehensive property refurbishments and renovations, covering a wide array of services such as extensions, structural repairs, kitchen and bathroom refurbishments, plastering, rendering, brickwork, bespoke carpentry, painting and decorating. Please kindly refrain from considering us for shortlisting if your primary criterion is the lowest cost rather than quality.
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Latest review:
Plastering- 24 Nov 2020
Pat was absolutely fantastic he came over to quote very quickly, gave a fair price and the did the work quickly and to a very high standard. He also offered lots of other advice and went above and beyond. I would really recommend him for building work
Gamfi Construct
Rating: 5 out of 5
Extension Builder in Canonbury
https://gamficonstruct.carrd.co/ Experienced contractor based in London, offering Loft Conversion and House Extension, Demolition and strip‑out works, full property renovations, painting & decorating, landscaping, gardening and Professional cleaning services. We work with both private and commercial clients and can collaborate with architects when required. Registered CIS subcontractor with full Public Liability Insurance and a commitment to fair, transparent pricing.
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Latest review:
Gamfi Construct delivered excellent interior decoration work for my 3‑bedroom home. The team was punctual, clean, and delivered a high‑quality modern finish. I highly recommend their services.
ASC
Rating: 5 out of 5
Extension Builder in Canonbury
Plumbing & heating — full professional range ASC HEATING & PLUMBING is based in London and works across London and the surrounding areas. With 6+ years in business, we offer everything from emergency call-outs and repairs to installations, leak detection, drains, bathrooms, boilers, central heating, underfloor heating and commercial plant rooms — planned so you know scope, timescale and cost up front.
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Latest review:
Plumbing- 1 Apr 2026
Aurel and his son did a great job, really knowledgeable and helped with a difficult job. Not only were the results fantastic but the guys were a pleasure to have around.
Ed’s loft conversions Ltd
Rating: 5 out of 5
Extension Builder in Canonbury
We specialise in loft conversions, Extension to a complete house refurbishment.
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Latest review:
I engaged Edi to work on a full renovation and refurbishment of a 4 bedroom detached house with front and back gardens on Blackheath’s Cator Estate. Edi did an extensive amount of work, including stripping out; plumbing; plastering; windows installation; carpentry; and decoration. In addition, after commencing the property work, once the scaffold had been erected, following sensible advice, Edi and his team replaced the roof and fully insulated the attic; fitted additional electric points; rebuilt the garden patio; and replaced the flooring throughout, in addition to other important jobs including re rendering and pointing of chimneys, building new wardrobes in the main bedrooms; and upgrading the radiators. A new kitchen, and two new bathrooms have been fitted. The kitchen redesign meant knocking through a wall with the lounge to create a larger space. Edi is a highly skilled craftsman, who thinks creatively as he works to make best use of the space, including shelf fittings, and additional lighting for example. He has built some beautiful wardrobes, and the internal decorations have brightened up what was previously a rather shabby looking house. In addition to the above, I wish to commend Edi for his professionalism, courtesy, and passion for doing the best work possible. On all the site visits I attended, and every time I spoke with him on the phone, it was striking how much he cared about the work that he was doing, his desire to ensure that the house would look the best. I always left site visits with the feeling that he cared so much about the house that he could be safely relied on to give the best advice to enable us to make the right decisions. I also noticed that Edi and his team would take the upmost care to keep the property safe, tidy and in good shape throughout the project. He can be fully trusted to look after any site he works on. He is intelligent and careful when it comes to safety and security. It has been a pleasure for Edi and his team to work with us over a period of around 6 months, and he did so much to reduce the stress of a significant project so that we could always rely on him to work methodically, patiently and sensibly, and to make best use of the resources available. His pleasantness shines through, and everyone I know who has spoken to him has always provided me with the most positive feedback I have no hesitation in recommending Edi to anyone who wishes to engage him for future projects, and is most deserving of the good words that I and others that work with him have to say about him.
DGH Construction
Rating: 5 out of 5
Extension Builder in Canonbury
Greetings, My name is Defrim and with over 3 decades of international and national experience in the field I provide high quality work and solutions at an outstanding rate. Please feel free to contact me for a free estimate.
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Latest review:
Carpentry- 5 Nov 2022
The Job was done efficiently and I was extremely pleased with the builders professionalism and his experience. He worked with extreme care and once the job was completed he tidied and left the area clean.. I will definitely recommend him..
Pentire electrician
Rating: 5 out of 5
Extension Builder in Canonbury
My aim to make sure electric is safe to use and comply with BS regulation and customers are satisfied with my work and happy
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Latest review:
Electrical- 2 Mar 2015
Did the job well, pleased with the outcome of the work carried out. Happy to recall for future work.
Martin
Rating: 5 out of 5
Extension Builder in Canonbury
EAGLE UNIT CONSTRUCTION LTD WE ARE THE PERFECT COMPANY TO MAKE YOU HAPPY WITH YOUR HOME MAKE YOUR CHOICE NOW
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Latest review:
Painting & Decorating- 18 Sep 2022
Martin is a very attentive, multi skilled and thoughtful worker. His quote is accurate and honest. Most builders I have hired in the past offer a better price but then there is almost always additional 'hidden' costs. Martins work is thorough and works to completion. I would always hire Martin for a complete honest job knowing that I will get what I pay for. I would highly recommend him.
Nicely Done Always
Rating: 5 out of 5
Extension Builder in Canonbury
Our success is a your happiness. We strive on achieving high standard finishing to achieve high level of customer satisfaction. With us you can’t go wrong. From kitchen and bathroom renovation, to landscaping and gardening work we do it all. So lets get in on and make it happen.
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Latest review:
The guys from NDA have really have executed the works i wanted carried out on another level. The tiling in the bathroom is just lovely. The whole bathroom feels so different i still cannot believe it. Well above my expectations if im honest. Thanks guys. i will definitely be in touch on my next project.
rrahman
Rating: 4.7 out of 5
Extension Builder in Canonbury
We are a trusted loft conversion specialist dedicated to transforming unused attic space into beautiful, functional living areas. With years of experience in design, construction, and project management, we deliver high-quality loft conversions tailored to each client’s needs. Our services include dormer, hip-to-gable, and mansard loft conversions, all completed to the highest standards using premium materials. From initial consultation to final handover, we manage every stage of the process, ensuring a smooth and stress-free experience. We pride ourselves on attention to detail, transparent pricing, and excellent customer service. Whether you need an extra bedroom, home office, or living space, we help you maximise your home’s potential and add lasting value.
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Latest review:
Loft Conversion- 20 Jan 2023
Really lucky to find Rahman as our choice of builder. Communication and quality of work was second to none all done for a fair price. Any issues or delays he was expecting he communicate to me as soon as he knew. His team were great, all professionals and cleaned up after each day of work was complete. Highly recommended and look forward to working with him again on my future projects.
OL and Edward Limited
Rating: 4 out of 5
Extension Builder in Canonbury
Years in business: since 1996 At OL & Edward Limited, we take pride in delivering creative solutions which are as practical as they are eye-catching – no matter if it’s a home interior makeover or commercial development; from concept through completion each project gets special attention down to even the tiniest details for maximum impact results worth celebrating about! But don't just take our word for it – experience first hand why clients come back again (and again!) by taking advantage of any one of our services today: Full home renovation, bathroom and kitchen installation, flooring, tiling, consultation, design, exterior works and much more
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Latest review:
Restoration & Refurbishment- 17 Feb 2025
Great job on cleaning and refurbing our 2 bed flat. Very professional and responsive. Would hire them again in a heartbeat.
Ceca Developments LTD
Rating: 5 out of 5
Extension Builder in Canonbury
Hael Construction Ltd, a proud member of the Federation of master builders, is a trusted construction company based in North London, delivering high-quality building services across the region. We specialise in new builds, extensions, loft conversions, renovations, groundworks, electrical installations, and plumbing. With a skilled team of qualified tradespeople and experienced project managers, we provide a complete service from design to completion. Our focus is on quality workmanship, transparent communication, and delivering projects on time and within budget.
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Latest review:
Extensions- 23 May 2022
Ceca Developments have done an outstanding work on our side and rear extension project, and we would definitely recommend this company. Firstly, they have offered a really competitive quote for the work and have been very transparent and detailed in regards to how long it will take to complete the project. Sebastjan has been a pleasure to deal with and was very helpful during the project, providing honest and useful recommendations and being available every time we needed anything. All the work has been completed to a very high standard and to the agreed timelines. We did not have to worry about anything during the whole project, which made this a very pleasant experience.
Ali builder
Rating: 5 out of 5
Extension Builder in Canonbury
Hey I go with the name of Ali builder! I been working in the building field for the last 20 years and have got many clients and every client I work for I make sure I do the 100 percent perfect !
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Latest review:
Mr Muhammad is a great guy with a lot of skills and he was refer to me by friend and he has done my work very nice and on time . Very professional man with great sense of hummer

4.1

Top rated Extension Builders

Our Extension Builders in Canonbury, are rated 4.1 out of 5 based on 18 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.