Extension Builders in Hornsey

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.9 (16 reviews)

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Some of our top rated extension builders in Hornsey

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H&J Properties 02 Ltd
Rating: 5 out of 5
Extension Builder in Hornsey
H&J Properties is your friendly, reliable small team with over 10 years of experience in the building industry. We design, plan, build, and project manage, so you can rely on us for a full round of service. From floor and wall tiling to full kitchen and bathroom installations, we’ve got your home covered. We handle plastering, painting, drylining, insulation, and more with precision and pride. Need a loft, rear or basement extension, a new roof, or concrete work? No problem. Whether it’s bricklaying, basement waterproofing, or installing windows and doors, we bring craftsmanship and care to every job. Big or small, we build it right. Please message us directly for more project images.
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Latest review:
We have contracted H&J Properties for our house refurbishment in London. I was impressed with the team's professionalism and project management from start to finish. We had no plans or planning approved, so we wanted a design and build company who will be able to look after the project from start to finish. They did just that. Working with the architects and the planning application before starting the project planning. As always, there are, of course, unforeseen issues arising with the old houses in london but I could't be happier with the communication received from the team. Thanks for the great job.
London & Kent Best Kitchen & Bathroom Solutions Ltd.
Rating: 5 out of 5
Extension Builder in Hornsey
Our highly skilled team of builders, carpenters, electricians, decorators and plumbers are reliable, trustworthy and dedicated to achieving the highest quality finish for your project; however large or small. Each project is tailored to your requirements and managed via a single point of contact.
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Latest review:
Bathroom Fitting- 26 Nov 2020
Sylwester and team did a fantastic job and were incredibly accommodating and polite with all of our requests. Would definitely recommend.
LEBELLE HERITAGE & RESTORATION LTD
Rating: 5 out of 5
Extension Builder in Hornsey
Lebelle Heritage & Restoration Lebelle Heritage & Restoration is a professional building and construction company specialising in renovations, refurbishments, and heritage restoration. We take on all types of projects, from full property renovations and structural upgrades to detailed interior finishes and the careful restoration of period features. Our team is skilled in both traditional craftsmanship and modern construction methods, allowing us to deliver work that is reliable, high-quality, and built to last. Whether we’re restoring the character of an older property or breathing new life into a modern home, we focus on precision, honesty, and clear communication throughout every stage of the job. We pride ourselves on delivering clean, efficient, and well-executed work that meets the needs of our clients and respects the integrity of each building. At Lebelle Heritage & Restoration, we build, renovate, refurbish, and restore with a commitment to quality and long-term durability.
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Latest review:
After a previous contractor took our money and left our loft extension unfinished, we were devastated and worried about how we would ever get our home back to normal. Then Lewis from Lebelle stepped in and completely turned things around. Lewis was patient, understanding, and incredibly professional. He worked quickly, kept costs under control, and finished the loft extension to a standard we’re so happy with. The stress he took off our shoulders was unbelievable. We honestly can’t thank Lewis enough. If you’re looking for someone trustworthy, skilled, and genuinely caring, Lebelle is the company to call.
Doni Brickwork
Rating: 4.9 out of 5
Extension Builder in Hornsey
Im a skilled bricklayer. I been in construction for about 10 years. I can do extension, patio, loft, garden walls and many more. My job is always 100% perfect. Thanks a lot.
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Latest review:
Bricklaying- 30 Aug 2026
I couldn’t recommend Donny highly enough. He rebuilt the brickwork on both sides at the front of my property and the transformation is incredible. From start to finish, he was professional, reliable and clearly takes real pride in his work. His attention to detail is excellent – the brickwork is straight, clean, level and beautifully finished, with great care taken over the brick layout, cuts and mortar joints. He also took the time to explain everything and made sure I was happy throughout the job. Looking at the before and after photos, it genuinely looks like a different house. Replacing the old timber sections with proper brickwork has completely transformed the front, making it look smarter, more modern and much more substantial. Donny was friendly, tidy and very easy to deal with. A genuinely skilled tradesman who cares about the finished result. 10/10 workmanship – I’ll definitely use Donny again and would recommend him without hesitation.
Valentin Tolea
Rating: 5 out of 5
Extension Builder in Hornsey
I describe my self a very serious builder ,with huge experience in a construction field in all sort of jobs that I mentioned below , 5 years in Italy Rome ,7 years in Romania and 4 years of full UK building site and private experience .I would interested in taking over both ,internal and external execution works
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Latest review:
Plastering- 7 Mar 2018
I hired Valentin for our job of removing an arch as well as widening a hatch and then re-plastering. I am so glad I did! He was a courteous and reliable worker. Very flexible with timings and honouring our requests. He was very neat and tidy too. His price were fair and he did a superb job to a high standard. I would hire him again for any job and I would happily recommend him to others.
Woodlake Building Contractors
Rating: 5 out of 5
Extension Builder in Hornsey
About us: We are a General Building Company, established in 2000 specialising in Home Extensions, Loft Conversions and Full Home Renovations. Our workmanship and reliability are the firm standards which we have built our company reputation upon, to deliver a high quality product and value to our customers homes. We pride ourselves for having qualified tradesmen in our team who have been working together with us for many years. Our projects are delivered on time and within budget.
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Latest review:
Carpentry- 3 Apr 2021
I am really pleased with the work woodlake have done in my flat. Gudarz and Darius have done a brilliant job. The flooring and painting is to a very high standard and it has really transformed the space. Very professional and great work ethic.
Omerta Builders Limited
Rating: 5 out of 5
Extension Builder in Hornsey
We undertake many jobs and specialise in extensions, loft conversions, painting and decorating, bathrooms, kitchens, and plumbing and electrical works. We work all over London, and have even completed jobs outside of London too. We take pride in the quality work we deliver, and make sure customer satisfaction is at the forefront of what we do. Combined within the company we share 30 years of construction experience.
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Latest review:
Extensions- 11 Jun 2019
Very good builders. Came on time every day and finished work on time. Very reliable and trustworthy. We had quite a few hiccups along the way but they always managed to find a solution. Would definitely recommend them and use them again.
D&E Smart Building Solutions Ltd
Rating: 5 out of 5
Extension Builder in Hornsey
Loft conversion. New or refurbished extension. All Carpentry work. New decking or refurbished. Brick walls front of the house, or new building. New or refurbished bathroom, Tilse, Garden, Kitchen, Wood floor, Plumbing with certificate, Electrical with certificate, and much, much more..
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Latest review:
Bathroom Fitting- 7 Mar 2022
Daniel was great and we were impressed by the level of care and detail in his work. Would use him again and recommend to friends.
Onpoint Building & Maintenance Solutions Limited
Rating: 5 out of 5
Extension Builder in Hornsey
OnPoint Building & Maintenance Solutions is a family-run business with over 25 years of combined experience in delivering high-quality building and maintenance services. Based in the heart of Walthamstow, E17, we are strategically positioned to serve clients both locally and across locations within the M25, offering seamless and reliable solutions for all your property needs. At OnPoint, we pride ourselves on being a one-stop solution for all building and maintenance projects, with every aspect of our work carried out in-house by our skilled team. From interior and structural work to electrical, plumbing, painting, decorating, and carpentry, we are dedicated to turning your vision into reality with exceptional craftsmanship and attention to detail. Our mission is simple: to provide stress-free, reliable, and efficient services that exceed customer expectations. Whether you’re planning a full refurbishment, a kitchen or bathroom renovation, or need professional maintenance for your property, we ensure every project is completed on time, on budget, and to the highest standards.
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Latest review:
Kitchen Fitting- 30 Aug 2025
Sab and Koli were lovely to work with - transparent with pricing, efficient and hard working, and creative with any problems that arose on an awkward job. Loving my new kitchen, thanks guys
1st Loft Ltd
Rating: 5 out of 5
Extension Builder in Hornsey
At *1st Loft Ltd*, we specialise in loft conversions and home extensions, delivering every project with exceptional craftsmanship and an unwavering commitment to quality. Our work is carried out with precision, attention to detail, and a strong focus on client satisfaction. With years of experience in the industry, we take pride in transforming homes into clean, comfortable, and functional spaces—free from dust, defects, and lingering issues. Our goal is to ensure every client is completely satisfied with the final result. Thank you for placing your trust in us. We’re always here to support your vision and turn it into reality with professionalism, reliability, and care.
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Latest review:
Extensions- 11 Jul 2024
I recently had the pleasure of working with Pajtim on a large project, and I couldn't be happier with the results. Pajtim is incredibly friendly, level-headed, and trustworthy. He kept to the agreed quote and consistently updated me on the progress. He understood my difficulty with planning and financial challenges and showed great attention to detail throughout the project. Although there was a long snag list, it was understandable given the project's size. The garden is still to be completed, but I'm glad I chose him. I highly recommend Pajtim for any building work.
KG DESIGN & BUILD LTD
Rating: 5 out of 5
Extension Builder in Hornsey
Hi I`m Kleida .I worked in Building industry for a while now and I have built a quite a knowledge on extensions loft conversion and refurbishment . I recently decided to start working for myself .I also have a very good working team with various knowledge on various stages of projects .
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Latest review:
Conversions - General- 8 Oct 2025
Gaz and his team were professional and hard working, and clear about what would happen when. The job is now finished to a good standard, and on time.
Uk Pro Building And Tiling Ltd
Rating: 3 out of 5
Extension Builder in Hornsey
15 years experience ,and fitting bathrooms with passion and paying attention to details,to deliver the job in highest quality for our clients.Always available with smart solutions and advice.Saving for you time and money. We are looking forward to work with you Thank you
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Ronaldo
Rating: 5 out of 5
Extension Builder in Hornsey
Skilled and experienced carpenter who uses high quality tools and providing good quality jobs. Build-in wardrobe Tv media wall Hardwood staircase installation Doors Kitchens
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Latest review:
Hard Flooring- 1 Jan 2025
Ronaldo was very polite and tidy and did a beautiful job on my stairs and landing in engineered oak,highly recommended.
Vasilis Bachos
Rating: 5 out of 5
Extension Builder in Hornsey
My name is Vasilis and I am an enthusiastic individual who loves what I do. I have 35 years of experience in construction and I am ready to take on any requests! One thing to keep in mind, I don't speak very good English; however rest assured I have way to tackle that minor inconvenience!
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Latest review:
Kitchen Fitting- 3 Aug 2026
Great kitchen fitter - can’t fault the kitchen. Many thanks
Jt building
Rating: 5 out of 5
Extension Builder in Hornsey
I have been a multi trader for over 12 years, with quite extensive experience working in majority of trade departments from kitchens, bathrooms, tiling, plumbing, doors, windows, joinery, carptentry, first fix, second fix, lofts and extensions, have seen through many projects and worked with many people. Can also assist with design ideas/plans as well as build. Happy working with small or large projects, take full responsibility and pride in my work.
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Latest review:
I couldn’t be happier with the work carried out on my home. The tiling on the ground floor, the laminate flooring upstairs, and the kitchen units were all completed to an exceptionally high standard. The attention to detail was outstanding, and everything was finished neatly and professionally. He was reliable, hardworking, and clearly takes great pride in his work. The end result looks amazing and has completely transformed my home. I would highly recommend him to anyone looking for quality workmanship.
Shapesmakers LTD
Rating: 5 out of 5
Extension Builder in Hornsey
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

3.9

Top rated Extension Builders

Our Extension Builders in Hornsey, are rated 3.9 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 Hornsey?

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

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

What are the hourly rates of extension builders in Hornsey?

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

Find extension builders in Hornsey with MyBuilder

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

Step 2: Compare different extension builders in Hornsey

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

Step 3: Hire Hornsey extension builders with confidence

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

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

What to ask a Hornsey extension builder before hiring?

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

An extension builder in Hornsey 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 Hornsey 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 Hornsey?

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 Hornsey 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 Hornsey 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 Hornsey

Can an extension builder in Hornsey help with planning permission?

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

Many Hornsey 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 Hornsey help with materials and finishes?

Yes, most extension builders in Hornsey 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.