Extension Builders in Muswell Hill

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.9 (15 reviews)

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Some of our top rated extension builders in Muswell Hill

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Genesis London
Rating: 4.8 out of 5
Extension Builder in Muswell Hill
We are more than a building company; we are the artisans of space transformation. Our passion for construction and design is reflected in our specialisation in exquisite kitchen and bathroom installations, comprehensive full-scale refurbishments, and bespoke extensions that enhance your living space. Our expertise extends to loft conversions, where we create functional and stylish additional areas within your home. We take pride in our property development projects, expertly converting buildings into modern, segmented flats, each with its own unique character. Understanding the essence of a personalised touch, we create bespoke built-in wardrobes and shelving units that blend seamlessly with your interiors. Our custom glazing solutions promise not only utility but elegance that complements the aesthetic of your space. Sustainability and innovation are at the heart of what we do. We are innovators in designing and creating reclaimed wood furniture, bringing together environmental consciousness and contemporary design. Our wall-mounted beds are a testament to our commitment to space-saving solutions without compromising on style or comfort. Choose us for a partnership where your vision is our blueprint. From inception to execution, we ensure a service that is as reliable and steadfast as the structures we create.
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Latest review:
Restoration & Refurbishment- 9 Apr 2024
Hector, Elvis and Fabian did a fantastic job renovating our flat. They laid new tiles in our entryway, solved a number of issues with our flooring, removed an old gas pipe and repainted the walls and woodwork in our hallway. We were really impressed with their professionalism and not only did they do a fantastic job but they were a pleasure to have in our home. Very respectful, friendly and knowledgable. They even finished ahead of schedule. We would highly recommend them and would definitely have them back the next time we do a home renovation project.
Pyramid construction
Rating: 5 out of 5
Extension Builder in Muswell Hill
There is father and son business. We do most bricklaying, Extension, garden walls, renovations and home improvements. Experience 15 years. We are reliable and professionals on our job. Happy to give an estimate.
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Latest review:
Bricklaying- 24 Oct 2020
Perfect. ways on time and to the point Egki and his colleague did an excellent job. With thanks, J.
PP Company
Rating: 5 out of 5
Extension Builder in Muswell Hill
My name is Przemek. I'm working in the construction branch for 20years. EXPERIENCE: *LOFT CONVERSIONS, *RENOVATIONS, *EXTENSIONS, *PLUMBING & HEATING SYSTEMS, *REWIRING & ELECTRICAL SYSTEMS, *FITTING KITCHEN & BATHROOMS, *TILING, *PAINTING & DECORATING, *PLUMBING & ELECTRICAL CERTIFICATE.
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Latest review:
Decking- 29 May 2020
Started on time and completed the decking extension & renovation to a high standard. Ensured that small details like cuts around poles etc, were finished properly and not left with gaps. Next time I would confirm that clearing rubbish is part of the quote, but highly recommend Przemek for quality finish.
CIF Builders
Rating: 5 out of 5
Extension Builder in Muswell Hill
We are family run business and have been in the trade since 2001. Our professional team will always give the best they can to achieve optimal results and most important for us are the finishing details and customer satisfaction. We can provide a range of different services from conversions, to extensions, bathroom and kitchen fittings and full restoration.
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Latest review:
Extensions- 28 Mar 2021
Amazing work from CIF Builders: John and his team delivered an amazingly looking extension and were a pleasure to work with. I have no doubt I will employ them again!
Shapesmakers LTD
Rating: 5 out of 5
Extension Builder in Muswell Hill
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
Gjat construction ltd.
Rating: 4 out of 5
Extension Builder in Muswell Hill
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.
ASC
Rating: 5 out of 5
Extension Builder in Muswell Hill
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.
GOLDFIELD CONSTRUCTION LIMITED
Rating: 4.7 out of 5
Extension Builder in Muswell Hill
Goldfield contraction limited since 2010 we are an professional team, specialising in refurbishment, kitchens and bathrooms installations, carpenter, bespoke furniture such a wardrobe, cupboard etc, painting and decorating single and double story extensions, conversions of all different sizes, general maintenance.
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Latest review:
Bathroom Fitting- 20 Dec 2021
Excellent work, well executed, will certainly hire again.
Harry butler
Rating: 5 out of 5
Extension Builder in Muswell Hill
10 years construction experience in carpentry as well as experience in all general build and a scope of works including extension kitchens loft conversions doors floors tiling fencing and bathroom works and remodels
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Latest review:
Carpentry- 19 Aug 2026
The job Harry done was absolutely excellent. From start to finish he communicated well,adressing all the relevant points of installing the pergola. I was very pleased with attitude towards making sure the job was done to perfection. I would definitely hire him. again and again.
P&T Property renovation LTD
Rating: 5 out of 5
Extension Builder in Muswell Hill
LND Development ltd was established by a Polish builder. As a business we pride ourselves to provide a very experienced, hard working, friendly and loyal workforce. We provide a professional and experienced service at very competitive rates.
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Latest review:
Pawel and the team did a fantastic job. The bathroom looks superb and the whole team took time to finish the job to a very high standard. There was a narrow timeframe in which to do the work and this was met (despite more effort than first thought with respect to strengthening the floor). Pawel was easy to deal with and contacted me after the job to ensure everything ok. Highly recommended.
Vasilis Bachos
Rating: 5 out of 5
Extension Builder in Muswell Hill
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
bego limited
Rating: 5 out of 5
Extension Builder in Muswell Hill
Hello I'm Sinan I have been in the construction industry for many years and for me it is not just a job, it is a passion. I absolutely love creating new spaces for people, transforming their homes, and adding real value to their lives. Seeing the joy on my clients' faces when their vision comes to life is what keeps me going. From extensions, conservatories and loft conversions to kitchens, bathrooms, remodeling and even brand new structures, I've done it all. Each project is a unique opportunity to feature high-quality craftsmanship and attention to detail. If it's not done right, I believe it's never been done. Are you thinking of converting or expanding your home? Let's work together to create something extraordinary. Whether it's a cozy family extension or a modern, functional kitchen, I'm here to make your dream space perfect. How about grabbing a coffee and talking about your ideas? 😊
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Latest review:
We have asked him to get paint all indoor walls and also replace the carpet with plywood sheets on saloon. He has done everything perfectly in few days even quicker then we expected. He works very clean and we have never been disturbed by his existence during his work
Metropol
Rating: 5 out of 5
Extension Builder in Muswell Hill
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Latest review:
Restoration & Refurbishment- 12 Jan 2026
amazing experience, they did a really really good job and were reliable, on time, had a good attitude. would highly recommend.
Dioni construction ltd
Rating: 5 out of 5
Extension Builder in Muswell Hill
Hi there! My name is Drilon and I am a builder who has been in the building trade for over 10 years. I have completed numerous jobs all over London. My company undertake work like extensions,bathroom, kitchen, flooring,loft conversions as well as general refurbishments. My previous customers are always happy with the quality of my work as well as my time keeping and how clean I keep the site during the project. I am based in North London and provide free estimates for all potential projects.
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Latest review:
Loft Conversion- 16 Feb 2023
Very good builders, very kind, I’m absolutely recommending them
O.L.T.O CONSTRUCTION Ltd
Rating: 5 out of 5
Extension Builder in Muswell Hill
we are able to undertake any work that has to do with the interior and exterior of your home. Responsibly!
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Latest review:
They did an amazing job of our extension from initial quotation right the way through until project completion. Communicated very well and all of the team were respectful and hard working throughout each stage of the project. Would highly recommend!
Ermal
Rating: 4.9 out of 5
Extension Builder in Muswell Hill
Name: Ermal Keri
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Latest review:
Plumbing- 23 Jul 2026
Great service. Fast. Reliable.

3.9

Top rated Extension Builders

Our Extension Builders in Muswell Hill, are rated 3.9 out of 5 based on 15 reviews from customers like you.

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

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 Muswell Hill 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 Muswell Hill who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Muswell Hill?

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

Find extension builders in Muswell Hill with MyBuilder

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

Step 2: Compare different extension builders in Muswell Hill

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

Step 3: Hire Muswell Hill extension builders with confidence

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

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

What to ask a Muswell Hill extension builder before hiring?

Before hiring an extension builder in Muswell Hill or extension building company in Muswell Hill, 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 Muswell Hill?

An extension builder in Muswell Hill 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 Muswell Hill 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 Muswell Hill?

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 Muswell Hill 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 Muswell Hill 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 Muswell Hill

Can an extension builder in Muswell Hill help with planning permission?

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

Many Muswell Hill 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 Muswell Hill help with materials and finishes?

Yes, most extension builders in Muswell Hill 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.