Extension builders in Muswell Hill

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.4 (14 reviews)

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

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 Muswell Hill

3543 Results

Sort by:

Ndreu builders
Rating: 5 out of 5
Extension Builder in Muswell Hill
Hello,I have 23 years working in construction. I am specialised experience within painting and decorating. I also complete domestic and commercial property refurbishments, silicon rendering, driveway and patio installations, plastering and gardening. I mostly take on all kinds of multi trade work. Please don’t hesitate to contact me for any enquiries.
Get in touch
Latest review:
Handyman- 20 May 2026
He’s friendly and completes the job with care.
AB Building and Renovations Ltd
Rating: 5 out of 5
Extension Builder in Muswell Hill
Bathroom, kitchen or full renovation? One team handles every trade, start to finish. We are AB Building & Renovations, working across London and Cambridge. 7+ years. 150+ projects done. What we do: bathrooms, kitchens, tiling, flooring (LVT, laminate, parquet, herringbone), decorating, spray painting, carpentry, plumbing, patios and groundworks. What you get: one contact for the whole job, a clear quote with three price options, and £5 million public liability cover.
Get in touch
Latest review:
Painting & Decorating- 13 Nov 2025
The team did a solid job on our extension. They were on time, kept the place organised, and stayed easy to reach throughout the project. The extension came out exactly as agreed and the finish looks clean. They also took care of a few extra jobs for us, including painting the exterior, laying new slabs in the garden, and putting down new grass. The whole place looks tidy and well put together now. I would be happy to use them again.
Noli Antzara
Rating: 5 out of 5
Extension Builder in Muswell Hill
I’m Noli Antzara, a North London tradesman with 37 years of experience. I started working alongside my father at 18 and have spent my working life developing my craft. My main specialities are tiling, paving and brickwork. I also take on bathroom and kitchen tiling, slabs, garden work, blockwork, extensions and painting. Whether it’s a small repair or a larger project, I give the same care and attention to the finish. I prefer to visit the property, listen to what you want and provide a clear quote before starting. Depending on availability, I can often begin within one or two days. I’m based in North London and can travel approximately 60–70 miles for the right job. I know that inviting a tradesman into your home takes trust. I treat every property with respect, protect the areas I’m working in and keep the space as tidy as the job allows. I communicate clearly, take pride in the details and want you to feel comfortable raising questions along the way. After 37 years, I still care about improving and doing work I’m proud to put my name to. My aim is simple: to deliver a quality finish and leave every customer feeling that their home was in good hands.
Get in touch
Latest review:
Tiling- 6 Oct 2026
I couldn’t recommend Noli highly enough. He was incredibly friendly, professional and reliable from start to finish. His quote was very competitive and included all the materials. After seeing the fantastic job he did on my front garden, I wish I hired him before. His attention to detail and quality were impeccable. I’m genuinely grateful for his excellent service and have no doubt that Noli will be my first and only choice for any future projects. HIGHLY RECOMMENDED!
Nilo Construction Ltd
Rating: 5 out of 5
Extension Builder in Muswell Hill
Nilo Construction LTD is a 🏗️DESIGN & BUILD company specialising in FULL HOUSE RENOVATION, EXTENSIONS, LOFT CONVERSIONS & BESPOKE JOINERY With our in-house team of highly skilled Multitraders, project managers, designers and architects, we have the expertise to bring even the most complex projects to life. We are fully insured and qualified, ensuring both safety and quality in every aspect of our work. The feedback from our previous clients speaks for itself, reflecting our commitment to excellence and customer satisfaction. With a wealth of experience and a team of professionals, we are the ideal partner for both residential and commercial development projects.
Get in touch
Latest review:
Conversions - General- 3 Nov 2024
Igor, Zhan and team were fantastic. Communication was great start to finish and they completed the job to a high standard on schedule
Adam Favor
Rating: 4.8 out of 5
Extension Builder in Muswell Hill
Our business was founded to offer clients the opportunity to bring a vision to life. As a design & build business we can take your dream home concept and turn it into reality. We will provide you with design plans for your projects and thorough project management. We also have the professional, experienced and quality tradesmen that are essential to complete the construction phase of the project.
Get in touch
Latest review:
Plastering- 17 Jun 2024
Adam Favor and NOVA Design & Build are a nice bunch of guys and they are reliable/helpful. However, when it came to coving, architrave and flooring, acceptable standards were unfortunately not met. Other specialists had to be brought in to re-do around 20% of the job; namely certain sections of the cornice and door architrave. In the former, a few things were below standard including: 1) not joining the friezes in the correct places, 2) cutting inaccurately, 3) leaving gaps, 4) using silicon as a filler and adhesive. For the door architrave, the wood was misaligned and not glued/nailed properly. The flooring was not laid well because there are huge gaps at times; sometimes at 1 cm. Since the kitchen has been installed, it is too late to take up the floorboards again. The most dubious thing of all in this job was the quote received for decorating which was c. 15k for 47 m2. This included plastering repairs, but ultimately the job got done by someone else to a high standard at 7k.
KBS London Ltd
Rating: 5 out of 5
Extension Builder in Muswell Hill
We are a North London Carpentry and General building company. I am a Qualified Carpenter from New Zealand, I have 30 years experience with 20 in London. We can carry out all works on residential, retail and commercial projects, from strip out to completion. We have a network of tried and proven tradesmen and suppliers. We are Quick Clean happy to work out of hours if necessary. I will do you a free quotation and happy to discuss works and guide you if necessary. Karl
Get in touch
Latest review:
Carpentry- 8 Jun 2026
Responsive and good communication - delivered the job as planned and quoted. Would recommend.
Antonio
Rating: 4.8 out of 5
Extension Builder in Muswell Hill
My name is Antonio Sula Job’s i can do: •HOME RENOVATION •KITCHEN •PAINTING •BATHROOM FITTER •CARPENTERY •EXTENCION •FLORING •GARDEN •TILE For more information you can contact me
Get in touch
Latest review:
Carpentry- 17 Sep 2026
A brilliant piece of work, done to estimated budget. Very happy.
Delta Electrical Solutions Ltd
Rating: 5 out of 5
Extension Builder in Muswell Hill
My work consists: . ALL ELECTRICAL AND FIRE ALARM INSTALLATIONS. . NICEIC DOMESTIC AND APPROVED CONTRACTOR. . FULL REFURBISHMENT . EXTENSIONS AND LOFT CONVERSIONS. If your looking for a reliable hard working and fully qualified team of builders look no further then Delta Electrical Solutions Ltd.
Get in touch
Latest review:
Electrical- 10 Oct 2018
Glorian was super speedy fitting spotlights in my living room and kitchen. He was very tidy and did a great job all round.
G&J Construction
Rating: 5 out of 5
Extension Builder in Muswell Hill
Hi, my name is Jurgen and I have been working in the building trade for over 15 years. At G&J Construction we have a small but hardworking team who is specialised in : • Extensions • Loft Conversions • Bathrooms • Kitchens •All General Building Works We have done lots of extensions and loft conversions along with general buildings. Contact us for a free quotation and to advice you on your project. We look forward to working with you!
Get in touch
Latest review:
Restoration & Refurbishment- 31 Mar 2025
J&G did a fantastic job of renovating my kitchen, including removing the old units, altering a chimney breast according to Planning Permission guidelines, plastering, painting, moving the radiator, laying a new floor, running new electrics and fitting new units and appliances from Wren. Jurgen is an excellent communicator, always taking the time to explain what was going on and answering questions. I particularly appreciated his honesty about the structural challenges of altering an Edwardian chimney breast, proposing alternative solutions which were cheaper and less disruptive. The quality of the finish was really good - from the electrician and plumber to plasterers and painters, all his team took great pride in their workmanship, and were all polite and friendly. Although the overall length of the project got extended, Jurgen made sure all the snagging was thoroughly completed. Overall, highly recommended and a pleasure to deal with. I'd definitely hire Jurgen again.
BLUELIME CONVERSIONS LTD
Rating: 4.7 out of 5
Extension Builder in Muswell Hill
Bluelime is an established planning, design and construction company providing professional property services across London and the surrounding areas. Established in 2007, we have nearly two decades of experience helping homeowners successfully extend, renovate and transform their properties. Our services include architectural design, planning applications, interior design, structural engineering, building regulations, project management and construction. Whether you require assistance with one individual stage or a complete design-and-build service, we provide honest advice, creative solutions and a clear, professionally managed approach from the initial consultation through to completion. We have a strong track record of planning approvals and successfully completed projects. We have also been active on MyBuilder since 2012 and hold a 4.7 out of 5 customer rating, reflecting our long-standing commitment to quality, reliability and customer service. We offer a free initial consultation to discuss your property, understand your requirements and advise on the best way to move your project forward.
Get in touch
Latest review:
Extensions- 8 Oct 2018
Alton and his team at Bluelime have been incredibly helpful and enthusiastic throughout our design and planning process. From the start, Alton took his time to understand our needs and propose several cost-effective ways to improve my home and create more space for my growing family. The design process was completed efficiently and submitted for planning permission, which was granted without a problem. Since then, his team have continued to be helpful and communicative despite my need to delay to the building works due to unfortunate complications with my freeholder.
R&R Renovation
Rating: 5 out of 5
Extension Builder in Muswell Hill
R&R renovations is a professional building and renovation company specialising in residential extensions, structural alterations, full property refurbishments, kitchens, bathrooms and external works. We undertake projects ranging from individual renovation works through to complete property transformations and extensions. Our team can coordinate the different stages of a project, including demolition and preparation, structural steelwork, brick and blockwork, roofing, plumbing, electrical works, plastering, tiling, flooring and final finishing. We believe that good construction starts with clear communication. Before commencing a project, we discuss the scope carefully with the customer and provide a detailed written quotation explaining the works, inclusions, exclusions and payment stages. For larger projects, we are happy to review architectural and structural drawings and discuss the project on site before preparing a detailed quotation. We take pride in workmanship, reliability, keeping customers informed throughout the project and delivering a professional finish. Main services include: house extensions, structural alterations and RSJ installations, full refurbishments, kitchen and bathroom renovations, roofing and external works, patios and landscaping, plastering, tiling and flooring. We would be happy to discuss your project and arrange a site visit where required.
Get in touch
Latest review:
Bathroom Fitting- 26 Aug 2026
Reza quoted two weeks to renovate my bathroom but finished in just a week and a half. He brought in a team of three who worked efficiently and completed the job to a high standard. They were polite and courteous and took great care to cover all staircases and carpets, ensuring no damage was done to the house. When extra help was needed with the heating, a specialist engineer arrived promptly and completed the job smoothly. I highly recommend his services.
Switch Electric Services Limited
Rating: 4.9 out of 5
Extension Builder in Muswell Hill
A fully qualified electrician is a highly skilled professional equipped with comprehensive knowledge and expertise in all aspects of electrical work. With rigorous training and practical experience, they excel in designing, installing, and maintaining electrical systems with utmost precision and safety. From residential wiring to industrial installations, fully qualified electricians play a crucial role in powering the modern world, enabling progress, and illuminating our lives.
Get in touch
Latest review:
Electrical- 9 May 2026
He was good on price for the first inspection and attended as agreed. However, I was less happy with the remedial quote. Several items quoted did not appear to be needed, while some items that did need attention were not included. Overall, fine for the inspection, but I would have preferred a more accurate and practical quote for the follow-up work.
LMVContruction LTD
Rating: 5 out of 5
Extension Builder in Muswell Hill
With 28 years experience we are an friendly and local building company who can help with all your home improvements, whether it be a new bathroom, kitchen, plumbing job, painting and decorating or a complete refurbishment We provide a free no obligation quote We understand the need to provide top quality workmanship and great customer service, at a reasonable cost. We guarantee all our work and are covered by Public Liability Insurance.
Get in touch
Latest review:
Conversions - General- 28 Jan 2025
We were absolutely delighted with Lino and his services. He was incredibly patient , as our flat purchase was delayed. We required a total gutting off our flat, with new kitchen and bathroom, new flooring, painting, and all the rest. He had great communication throughout. He showed up on time with his team each day , and was so professional throughout. We went to Lino for advice throughout the process. He never said any of our plans were not possible- he always either said yes, or provided another option. This was such a great help. I would recommend Lino to anyone. We are absolutely delighted with our flat.
mohamad abou ali
Rating: 5 out of 5
Extension Builder in Muswell Hill
We deliver a wide range of design and build construction projects including: • Full House Renovations • Basement Installations • Extensions • Loft Conversions • New Builds Turn Key • Contract Site Fit Out Works • Commercial Premises Refurbishments
Get in touch
Latest review:
Conversions - General- 19 Nov 2022
Very impressed with the work from Mohammad - very excellent work. Highly recommended.
DS Developments
Rating: 5 out of 5
Extension Builder in Muswell Hill
My business is offering service in all the aspects of renovation, refurbishment and building work. My team is very reliable and respectful of our client's property. We work hard to make sure that all the work carried out is to the highest standards.
Get in touch
Latest review:
Garden Maintenance- 17 Sep 2017
I hired DS Developments to completely landscape my small front garden. This involved clearing and levelling the area; moving and re-securing a bike shed; laying a patio and lawn; and a number of finishing touches. The area went from somewhat of an embarrassing eye-sore to an area of pride. One that several neighbours have already made compliments about. David provided a professional service from start to finish. His quote was more than I expected, but his knowledge and vision gave me the confidence to select his services. He provided a selection of options and stuck to budget; adapted well to new ideas/suggestions; and informed in advance where the cost would be impacted. He and his team also were as tidy and considerate as possible and I highly recommend their services.
NA
Rating: 5 out of 5
Extension Builder in Muswell Hill
Skilled, tidy bricklayer. Highly competent in building, pointing and restoration. Garden walls, extensions, new builds, etc
Get in touch
Latest review:
Jack built a brick buttress to structurally support my garden wall. Originally I was going to rebuild the entire wall, but Jack’s advice to build a buttress saved me a lot of money! The job was done quickly, affordably and to a high standard. Would highly recommend.

4.4

Top rated Extension Builders

Our Extension Builders in Muswell Hill, are rated 4.4 out of 5 based on 14 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 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.