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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RS building
Rating: 5 out of 5
Extension Builder in Muswell Hill
We’re a highly professional team with over 20 years’ experience in extensions, loft conversions, high-end renovations, new builds, and property conversions. We deliver top-quality work on time and within budget. Our rates are among the most competitive in the UK at £180 per day per man + 10% OHP. With all specialist trades under one umbrella, we can handle projects of any size smoothly—from £20k up to £2m. Happy to discuss your project further
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Latest review:
RS Building successfully delivered two full back-to-brick refurbishments and a new-build development for us in Greenwich, including demolition and construction of four new dwellings. Their level of workmanship is exceptional, and their attention to detail is second to none. As experienced property developers, we’ve worked with many contractors—but RS Building stand out for their reliability, quality, and professionalism. We have since recommended them to several colleagues, all of whom have been equally impressed. Our only regret is not finding them sooner. We look forward to working with them again on future projects.
Bujar Vata
Rating: 5 out of 5
Extension Builder in Muswell Hill
I am in the building business for 15 years I have worked all around London specially in the City I have registered myself on Mybuilders.com so I can get job around my area.
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Latest review:
Tiling- 7 Jun 2026
Amazing job and a brilliant team of tradespersons. An excellent job of the herringbone tile flooring with underfloor electric heating for the whole of my downstairs. The wall panels also complemented the flooring and were installed perfectly. Well done to Bujar and his team!
Ovi
Rating: 5 out of 5
Extension Builder in Muswell Hill
Ovi the builder offers a comprehensive service specialising in loft conversions, extensions and refurbishments. We hold over 20 years experience within the construction industry, providing a high standard of work focusing on quality and ensuring a job well done.
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Latest review:
Plastering- 8 Sep 2026
Tidy and professional finish.
Prime contractors
Rating: 5 out of 5
Extension Builder in Muswell Hill
Prime contractors have been in the construction industry for about 25 years which includes domestic and commercial projects. Some of the domestic projects have been double extensions, loft conversions, house refurbishments and other small internal and external works which also include flat roof and cladding. Commercial projects have been from building double extensions and demolition having worked as a supervisor and manager.
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Latest review:
Conversions - General- 17 Apr 2026
A great experience. Work was completed quickly and to a good standard with an unexpected extra (sorting out the electrics for a light in the crawl space). Most tidy builders I have ever employed. Quick responses and good communication. I'd happily use Prime Contractors again
Urastar Construction Ltd
No reviews yet
Extension Builder in Muswell Hill
Interior and Exterior Works, Extension and Loft Conversions, Renovations, Refurbishment, Civil Engineering Consultancy
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Joe Louis Building LTD
New on MyBuilder
Extension Builder in Muswell Hill
We are making the world a better place.
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Monuk construction group LTD
No reviews yet
Extension Builder in Muswell Hill
We are 3 companies that have merged through successful trading a kitchen specialist bathroom specialist and a structural builder we are approved installers for wren ikea eco Trus we as standard fit light weight steel loft conversion extensions and refurbish properties we are moving towards property development and will soon be building our own properties but for now we are still working on other peoples.
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Bricklayer
Rating: 5 out of 5
Extension Builder in Muswell Hill
Brickwork . New build, extension . Garage
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Latest review:
Bricklaying- 10 Jul 2023
I am very pleased with the work done Excellent clean job Mr Bicol has carried out
Abdullah azouz.
Rating: 5 out of 5
Extension Builder in Muswell Hill
I’m involved in residential property development. My role includes supporting construction projects, coordinating with teams, and helping ensure work is completed efficiently, on time, and within budget.”
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Latest review:
Bathroom Fitting- 23 Apr 2026
Rapid response and professional work.
easy solution
Rating: 5 out of 5
Extension Builder in Muswell Hill
At A&W Construction and Renovation Ltd, we have over 15years of experience providing high-quality construction and renovation services across the London. We are dedicated to delivering exceptional results, no matter the size or complexity of the project. Our team offers a 24-hour emergency call-out service, ensuring that we are always available to meet your needs at any time. We work closely with our customers to ensure every project is completed to the highest standards. Our goal is to make sure that every customer is fully satisfied with the results, providing competitive quotes and reliable workmanship. We offer a wide range of services to enhance and maintain your property. From installing brand-new kitchens and bathrooms to converting lofts and building extensions, we provide solutions that add value and functionality to your home. We also provide essential services such as plumbing and electrical work, covering everything from boiler installations to electrical rewiring. Our carpentry and maintenance services ensure that any woodwork or general repairs are handled with precision and care. If you're looking for trusted and reliable builders for your next project feel free to get in touch with us today.
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Latest review:
Tiling- 21 Jun 2021
Great professional and reliable service from Easy Solution. Waqar called me ASAP and arranged to see my bathroom. He came within 1 hour to see the job and gave me an affordable and good quote. He was available to start work immediately. Waqar also suggested the colour of tiles that would suit the bathroom and made some very good recommendations on where i could purchase them at a decent price. My work was done to a high standards. Tiles are neatly put together with grout and they are looking amazing! I had some many relatives comment on them and i have recommended Waqar to them all as i was so satisfied with his service and professionalism in my property. I will be using him always in future. Thanks.
HM construction
No reviews yet
Extension Builder in Muswell Hill
H.Muzaci Contractor is a well-established building company with over 25 years of experience in the construction and renovation industry. We specialise in home renovations, extensions, refurbishments, and general building work, delivering high-quality results from start to finish. We pride ourselves on excellent workmanship, reliability, and attention to detail, no matter the size of the job. From initial planning through to completion, we work closely with our clients to ensure projects are delivered on time, within budget, and to a high standard. Customer satisfaction is at the heart of everything we do. We are tidy, respectful, and committed to clear communication throughout the project. Much of our work comes from repeat customers and recommendations, which reflects the quality and trust we’ve built over the years. Clients from all over City of London with references (Mayfair, Chelsea, Portsman Square). If you’re looking for an experienced, honest, and professional builder, H&M Construction would be happy to help.
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Vlad star ltd
No reviews yet
Extension Builder in Muswell Hill
15 years experience with perfect finish and good service.
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Carpenter
No reviews yet
Extension Builder in Muswell Hill
General building (carpenter)
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Masterful Build Limited
No reviews yet
Extension Builder in Muswell Hill
We are a family run company with a highly skilled workforce who have decades of experience and expertise in the construction industry.
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Red & Black
Rating: 5 out of 5
Extension Builder in Muswell Hill
Hi My name is Irdi Me and my team we are taking any job
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Latest review:
Carpentry- 27 Oct 2024
Amazing work ethic, very polite and punctual and did an amazing job. Definitely recommend and use again. Thank you.
All Aspects Group Ltd
Rating: 5 out of 5
Extension Builder in Muswell Hill
All Aspects Construction is a multi-disciplinary contractor who specialise in the construction, refurbishment and maintenance of commercial and domestic buildings. We focus on delivering the very best craftsmanship in all services delivered and a quality end product through sustainable construction all within an approachable and professional manner.
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Latest review:
Painting & Decorating- 30 Apr 2019
Thoroughly recommend this Company, very professional, industrious, thorough, and exceptionally helpful, left the working areas clean and tidy, definitely value for money, delighted with the job of work carried out.

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.