Extension Builders in Islington

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (19 reviews)

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Some of our top rated extension builders in Islington

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TEMFOR DESIGN AND CONSULTANCY LTD
No reviews yet
Extension Builder in Islington
We offer all relevant services under one roof for your extension, loft conversion and refurbishment projects. We work across the London area and offer competitive, affordable prices. We provide free design advice, full planning drawings, submitting the plans, and preparing any changes requested by the council. We also specialize in Extensions, Loft Conversions, Structural Alterations, and Full Refurbishments. Fully insured and all our work is guaranteed .
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4 You Residential Limited
Rating: 5 out of 5
Extension Builder in Islington
We have over 18 years of experience in residential and commercial refurbishment. We are skilled team of managers, architects, builders and craftsmen, competitively priced and flexible to suit your needs. We specialise in building basements, extensions, loft conversions and carry out full house refurbishments as well as working on smaller projects like kitchens, bathrooms, joinery and fit-out. Our team is energetic, fully insured, certified and recommended by long list of happy clients.
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Latest review:
Groundwork & Foundations- 18 Jul 2019
My wife and I have been truly impressed by Victor and Tom's quick turnaround and willingness to get the job done to an extremely high standard. Their men were friendly, efficient and tidy which is invaluable when taking on any new and daunting property project. As a result of their efficiency we are hoping to work with Victor and his team again in the coming months and would highly recommend them to anyone looking for a reliable and professional contractor.
E.V Roofing
Rating: 5 out of 5
Extension Builder in Islington
I am running my own business now. I am a carpenter first and second fix. I have a lot of experience 7 years (2 years in Norway+5 years in UK). I am dedicated to providing top quality house renovations, loft conversion , roofing (tiling,fibreglass),house extension ,flooring, doors, windows, kitchen , wooden floors .
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Latest review:
In the round I had a very good experience when working with Ermal on our 6 month project, Reliability, quality and speed all exceeded expectations. I would recommend Ermal and his team, especially for any carpentry.
T&S Construction
Rating: 5 out of 5
Extension Builder in Islington
Ive been in building work all my life and im very good so people say theres not many builders like me ,try me and i bet you have me back i can show my work .
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Latest review:
Extensions- 2 May 2018
Tom is a very competent builder, who has attention to details. Tom continuously went out of his way to find ways to meet my requirements, Whenever we had atypical challenge during my extension Tom's default position was "let's find a work around." He was creative and efficient in doing so, and most importantly cost effective, as I was running on tight budget. Fantastic experience working with Tom, he estimated the work to complete in 6 weeks, the work was done 5 and a half weeks and handed over. The works speaks of itself, very urban finish with high level of professionalism. I was almost hands off the project due to work travel, and Tom took care of all the aspects without me being involved day to day and micro manage. He is surely being to be big league builder in no time. I would recommend him whole heartedly.
Vadym Kutsak
Rating: 3.7 out of 5
Extension Builder in Islington
I have 7 years in basement, underpinning, extension. Was working at company "Hughes design&build" Have good knowledge in job
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Latest review:
Groundwork & Foundations- 30 Mar 2026
Vadym did a very professional job. He is a good communitcator , and left the site clean and tidy.
TCTSERV LTD
Rating: 5 out of 5
Extension Builder in Islington
Hard working, honest and reliable builder team, with over 18 years experience in property refurbishment. Proud of our work, we always try to exceed customer expectations. We deliver top quality services that our customers can rely on - at affordable prices. Free estimates. CALL Tache TODAY!
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Latest review:
Carpentry- 12 Nov 2017
Tony is a very professional tradesman. He was punctual and completed the job satisfactory within the recommended time line. I will be using Tony again and recommend him to family and friends.
property hospital
Rating: 3.7 out of 5
Extension Builder in Islington
Hope all is well. Property Hospital London is a property maintenance and refurbishment company. We understand the importance of communicating, time keeping and executing jobs at hand. Over the years we have evolved to give a hands off approach and take the stress away from day to day maintenance work.
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Latest review:
Tiling- 1 Oct 2022
Highly recommended, will use again. Very professional, reliable and knowledgeable. He was very reasonably priced and flexible. Super happy.
professional polish builder(london)
Rating: 5 out of 5
Extension Builder in Islington
I'm a builder (carpenter) with 19 years of experience in England. I do loft conversions and extensions - all building works. Carpentry and joinery is my main profession. I have a qualified bricklayer, electrician, plumber and others on my team who are happy to help. All works done by us coming with warranty and insurance.Dear potential client beware that we do not undertake structural building works without architectural drawings, structural engineer calculations etc. No time wasters please!
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Latest review:
Extensions- 26 Apr 2018
Professional Polish builders (london) ltd,?this is a suitable name for this company. They built an extension and loft for me in the time standards set. They aren’t a cheap service but the professionalism of this boys goes beyond and above. I’ve seen a lot in my life and it was the third extension I designed for myself as I’m architect. It is hard to find an honest builder who will tell you the truth about what is waiting for you during the works. The job was done relatively quickly even when I changed my mind a few times and the weather this winter was cruel but Adam and Martin were always positive so do not believe any one who gives a fixed price and time - it’s impossible to do. Adam and Martin are fantastic organizers and skillful professional builders, his team are friendly,very funny and hard working guys. Open minded guys who will tell you straight on what things you can save money on and what not to. My dog has fallen in love with them. Safety and common sense is a priority to the crew. I would recommend these boys to everyone. thanks for your help and hard work!
ZENZAR CONSTRUCTION
Rating: 5 out of 5
Extension Builder in Islington
🏠We take on everything from the smallest jobs to the largest projects, delivering the same level of care, quality, and attention to detail every time. ⚒️With experience in the industry since 2015, we’ve built a strong reputation for reliability, craftsmanship, and customer satisfaction. Over the years, we’ve provided clients with a wide range of services tailored to meet all their needs—no matter the size or complexity. 💭Whatever you have in mind, our skilled professionals are dedicated to bringing your vision to life with precision and care. From initial ideas to the finished result, we work closely with you every step of the way.
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Latest review:
Plumbing- 24 Mar 2026
Very quick response and came within hour and fix the problem..really good handyman..will contact in future as well .
Fastway Constructions Limited
Rating: 5 out of 5
Extension Builder in Islington
At Fastway Constructions, we are dedicated to redefining the construction industry through sustainable practices and innovative solutions. Based in the United Kingdom, we pride ourselves on delivering exceptional quality and reliability across four key sectors: Residential Constructions, Commercial Constructions, Industrial Constructions, and Renovation & Remodelling Here at Fastway all of our employees are fully qualified, skilled and very experienced building contractors that have worked on hundreds of projects over the years resulting in 100% client satisfaction, full job completion on time, and always well within budget. All employees hold cscs cards for their relevant trades along with health and safety certificates and first aid for a competent safe worksite at all times. We are a building contractor with a professional approach to all our projects. We offer a seamless and multi-trade service, for all domestic projects from new builds, extensions, loft conversion, renovation to fully finished houses, all tailored to meet our clients’ specific requirements.
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Latest review:
Plumbing- 1 Aug 2025
Jitin did a good job in finding a solution to the leak in the washing machine drainage pipe. He used his experience in problem solving and fixed the issue. Thanks Jitin
UTALE
Rating: 4.7 out of 5
Extension Builder in Islington
UTALEE PLASTARING Drylining RENDERING General buildings
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Latest review:
Plastering- 12 Jun 2026
Great communication clear pricing and really good and effecient work. Will use again!
Peter renovation
Rating: 3.7 out of 5
Extension Builder in Islington
When you need a reliable builder for refurbish or extend your property our skilled team of experienced craftsmanship are ready to help you. We can provide a tailor-made service to suit your budget and requirements!
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Latest review:
Conversions - General- 6 Oct 2025
Peter and Dan did an excellent job from start to finish. They were professional, reliable, and easy to work with. The quality of their workmanship is top-notch, and they finished everything on time and to a high standard. I’m really pleased with the results and would highly recommend them.
A claire
Rating: 5 out of 5
Extension Builder in Islington
Hi there I can do anything from A-Z with the best prices and to top quality finish, free estimations is available Best prices you’ll find from me 😜
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Latest review:
Tiling- 30 Apr 2026
Job was done to a professional standard. Very satisfied.
LQ Construction
Rating: 5 out of 5
Extension Builder in Islington
Based in North London and with over 18 years of experience in the construction industry, LQ Construction specialises in bricklaying, renovations, and paving services, offering our clients high-quality, reliable solutions to their construction needs. Committed to delivering excellence in every project we undertake., the extensive experience have equipped us with the expertise to handle a wide range of projects with precision and efficiency. We take pride in our craft and approach each project with a commitment to integrity, reliability, and meticulous attention to detail. Whether you're embarking on a major renovation or need professional bricklaying or paving services, we ensure your project is carried out to the highest standards, on time and within budget. Explore our website to learn more about our services and how you can trust LQ Construction to help bring your projects to life.
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Latest review:
Bricklaying- 11 Jul 2025
Landi was excellent. Finished the job to a good standard
MARCIN'S CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in Islington
Marcin’s Construction LTD is a professional building and refurbishment company delivering high-quality residential renovation services across London and surrounding areas. We specialise in full property refurbishments, kitchen and bathroom renovations, and interior works. Our focus is on clear communication, detailed written quotations and a clean, well-organised finish on every project. With over 10 years of experience, we work with homeowners, landlords and property investors, providing a structured and reliable service from initial discussion to project completion. Every job is carefully planned, carried out efficiently and completed to a high standard. Additional information about our work and recent projects is available on our company website.
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Latest review:
Extensions- 7 Oct 2025
I cannot recommend Marcin and his men more. They were immensely helpful throughout a difficult (due to my inexperience and space and budget constraints) and rushed project. They worked to my budget and schedule and delivered to high quality - really an unbelievable job. If you choose them, you are in good hands. They are honest, reliable, and trustworthy.
Thomas Wicks Building Services Ltd
Rating: 5 out of 5
Extension Builder in Islington
We are a growing domestic building company, with 20 years of experience carrying out all aspects of residential building projects. Extensions, Kitchens, Bathrooms and all of the related services such as Plumbing, Tiling, Electrics. We pride ourselves on giving the customer exactly what they want, making the experience of improving their property an enjoyable one.
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Latest review:
Bathroom Fitting- 2 Jan 2018
Tom was brilliant from start to finish. Clean and very personable, we have used him again since and will do in the future.

4.1

Top rated Extension Builders

Our Extension Builders in Islington, are rated 4.1 out of 5 based on 19 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Islington?

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

Find extension builders in Islington with MyBuilder

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

Step 2: Compare different extension builders in Islington

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

Step 3: Hire Islington extension builders with confidence

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

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

What to ask a Islington extension builder before hiring?

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

An extension builder in Islington 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 Islington 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 Islington?

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 Islington 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 Islington 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 Islington

Can an extension builder in Islington help with planning permission?

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

Many Islington 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 Islington help with materials and finishes?

Yes, most extension builders in Islington 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.