Extension Builders in Hornsey

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4 (17 reviews)

Easily find verified Hornsey Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in Hornsey.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in Hornsey

3454 Results

Sort by:

Marks construction
Rating: 5 out of 5
Extension Builder in Hornsey
We pride ourselves on giving an excellent level of service, through the workmanship and professionalism which often results in recommendations. Our goals are to provide a highly professional and quality service tailored to suit your individual needs working to achieve a combination of aesthetically pleasing, practical and cost effective solutions for your project.
Get in touch
Latest review:
Kitchen Fitting- 10 Jun 2026
Great communication, arrived on time and quickly resolved an issue with our integrated fridge cabinet. Very helpful, professional and reasonably priced. Would happily use again.
T C Construction Ltd
Rating: 5 out of 5
Extension Builder in Hornsey
TC CONSTRUCTION is a company build on a new generation of builder's with new ideas and construction systems to provide a hight quality job's for the customers.
Get in touch
Latest review:
Kitchen Fitting- 22 Mar 2022
Tudor did a great job on our kitchen. He kept us informed on progress all the way through the job allowing time in the morning for questions and then getting on with the work during the day. At the end of each day he showed us and spoke with us about the excellent progress he had made. Very pleased with our lovely new kitchen which is clean, bright and spacious.
Danny construction
Rating: 5 out of 5
Extension Builder in Hornsey
I have over 20years of experience in window fitting , during which I've gained experience and always worked on mastering my skills in installation, repair and customer satisfaction. I enjoy doing this job both independently and as part of a team( have worked for different companies before). I'm committed to meeting deadlines and delivering quality workmanship on every project and exceeding customer expectations.
Get in touch
Latest review:
Windows & Doors (uPVC & Metal)- 9 Feb 2025
Excellent work, very professional, good price. I would use him again. Great communication and I was very pleased he was available the next day.
Neli Limited
Rating: 4.5 out of 5
Extension Builder in Hornsey
Neli limited builder’s are a company based in London with over 10 years of experience in our trade, We cover a whole range of jobs including: • Slabbing ( all types ) • Astro turf • Turfing • Decking • Fencing • Block paving Thanks Neli
Get in touch
Latest review:
Landscaping- 6 May 2025
Great job in putting lots of porcelain tiles, new turf and new fence.
LondoNest Ltd
Rating: 5 out of 5
Extension Builder in Hornsey
Londonest is a London-based building company specialising in high-quality residential construction and renovation. We provide reliable and professional services including house extensions, loft conversions, full property refurbishments, kitchen and bathroom renovations, and general building works. Our team combines strong technical expertise with attention to detail to deliver projects that meet the highest standards of quality and safety. We work closely with our clients from the initial consultation through to completion to ensure every project is delivered on time, within budget, and to the client’s satisfaction. At Londonest, we pride ourselves on clear communication, transparency, and a commitment to excellent workmanship.
Get in touch
Latest review:
We hired this builder for a 2-metre rear extension and a very large garage extension and we’re really happy with the result. The project needed a pile foundation which is a bit more complicated, but they handled everything very professionally. They listened to what we wanted and kept us informed at every stage, which really helped as we were living in the house while the work was being done. The team were friendly, easy to deal with and worked to a good standard. Overall a very good experience and we would happily recommend them.
Pawel
Rating: 5 out of 5
Extension Builder in Hornsey
I am part of a dedicated two-man company with over 15 years of experience in the construction industry. We specialize in a wide range of construction projects, from extensions and loft conversions to garden transformations, as showcased in the photos below. When you choose me, you’re not just hiring a builder—you’re investing in exceptional craftsmanship, meticulous attention to detail, and a commitment to exceeding your expectations. I take great pride in my work, and my recent projects speak for themselves. I’d be delighted to share examples and even arrange visits to completed sites, where you can see the quality of my work firsthand and hear directly from satisfied clients. Your satisfaction is my priority, and I am committed to bringing your vision to life with professionalism and care. I look forward to discussing how I can help make your project a reality. Best regards,Paweł
Get in touch
Latest review:
The job was to remove a stud wall with an archway between my kitchen and hall. Pawel was excellent from start to finish. He was good to communicate with before, and answered my questions fully. He turned up on time, was very neat and kept the noise down. He did a great job and cleaned up afterwards. I’d recommend!
Planix Ltd
Rating: 5 out of 5
Extension Builder in Hornsey
Planix limited carry out all aspects of constructor but specialised in loft conversion, extensions, garage conversions and property refurbishment including kitchen and bathroom fitting.
Get in touch
Latest review:
Conversions - General- 21 Oct 2021
Job done well and good solutions provided when problems were encountered
P R Henry
Rating: 5 out of 5
Extension Builder in Hornsey
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.
Get in touch
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
Bulbuilder
Rating: 4 out of 5
Extension Builder in Hornsey
I am from Bulgaria.
Get in touch
Latest review:
Lovely father son business, professional, friendly guys. I asked them to build a plasterboard wall in order to create an extra bedroom in my house, the wall was finished well, within two days and they charged me a very reasonable rate, as a young women in business I find that tradesmen often try to overcharge me but these gentleman did not. They also took a look at leak that had occured which another professional plumber failed to solve and tried to charge me over £200 just to take a look! I have and will book them on a number of other jobs.
Hys Contractors
Rating: 5 out of 5
Extension Builder in Hornsey
We are a very experienced company with over 25 years in the building industry. We undertake all building works from refurbishment, extensions, painting and decorating, tiling, plastering, electrics and plumbing. We operate all around London.
Get in touch
Latest review:
Restoration & Refurbishment- 14 Mar 2022
Albert and his colleague were both very friendly, they completed the work within the time scale they said they would and to a high standard. I am very pleased with their work and will be using them again!
V Cota brickwork
Rating: 5 out of 5
Extension Builder in Hornsey
I’m a bricklayer by trade and a great builder, I have 21 years experience in this profession in London ,I have a very complete team,including an architect and engineer and they are all qualified. Thank you
Get in touch
Latest review:
Bricklaying- 16 Oct 2022
Needed a Bricky to help me with building a large garage out of aircrete thermal blocks, I’m glad I found Viktor, Good bricklayer, honest and hard working, I couldn’t be more happier. Thanks for your help.
NORTH STAR BUILDING SOLUTIONS LIMITED
Rating: 5 out of 5
Extension Builder in Hornsey
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.
Get in touch
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.
Sorin Dobrila
Rating: 5 out of 5
Extension Builder in Hornsey
I've been in trade all my life, and most of the time engaged in: 1. Property Renovations and Remodellings – involving extensions, conversions, repairs and refurbishment works on residential properties. 2. Small/middle size commercial projects – involving repairs and refurbishment works for commercial clients.
Get in touch
Latest review:
Extensions- 25 Aug 2021
Having had bad experiences in the past with other builders, this time we tried to do our homework properly before hiring someone. We couldn't have chosen a more competent and professional builder! We obviously asked around and had many quotes (some ridiculously expensive, others didn't even seem to understand what we wanted to do) but Sorin immediately impressed me with his detailed and fair quote, knowledge and lots of suggestions (he's the kind of guy that immediately gives you the impression that he knows what he's talking about). We encountered some issues during the works (which is to be expected if you didn't build the place yourself) but Sorin and his team did an amazing job and always gave us regular updates. End result? Work completed on time and a new construction that is exactly what we asked for (plus other things here and there that he kindly sorted while he was on site!)
CONSTA Construction Limited
Rating: 4.6 out of 5
Extension Builder in Hornsey
CONSTA Ltd - small construction company based in London, and characterises in flexibility to complete various jobs . There is list of different small or awkward completed jobs in our portfolio as well as more significant projects as loft conversions, extensions, full house reconstructions, new build and Passive House construction as well.
Get in touch
Latest review:
Extensions- 29 Aug 2021
Communicated well at the start with reasonable cost. work was done well but the finishing was not so great as expected. The end cost was very expensive. Charged by the hour, the team were very slow which was upsetting to see me pay for time where they sat around not doing much. Ensure to agree fixed price. Communication after job is poor, double glazing has warranty which now not being able to communicate with kostas having to pay to get things done that should be covered in warranty. Central heating give huge problems. Do not use for big jobs
Statecraft Building Ltd.
Rating: 5 out of 5
Extension Builder in Hornsey
We strive to provide the best building services posible within and outside London. Our company has been built on continuous recommendation, repeat custom and quality workmanship. We offer full building services and you can be sure we`ll take care of the job.
Get in touch
Latest review:
Milen, initially came as I had a leak in my ensuit where the tiles had lost their grout. He was very honest in giving me advice, and regrouted at a very reasonable price. He then came a month later to remove the tiles in the shower and replace the plaster protection board, then retiled. He purchased all the products and gave me advice on the most valuable sustainable tiles. The work was carried out a to very high level, I would most definitely hire Milen in the future, and highly recommend him.
I.V.M BUILDERS
Rating: 5 out of 5
Extension Builder in Hornsey
I.V.M Builders Limited. Established in Stratford, we have worked in the building trade for many years, I.V.M Builders Ltd are a reliable, fully accredited and professional company operating in East London and North London. We are prideful in all the work which we undertake, taking great care to make sure that our client’s needs are met meticulously and professionally. All of our builders are qualified to undertake the task at hand, and we operate to all governed standards.
Get in touch
Latest review:
Kitchen Fitting- 18 Nov 2023
The kitchen refurbishment exceeded my expectations! The attention to detail, modern design, Thank you for your expertise and professionalism throughout the process. I couldn't be happier with the results!

Top rated Extension Builders

Our Extension Builders in Hornsey, are rated 4 out of 5 based on 17 reviews from customers like you.

Quality screening

Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

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.