Extension builders in Willesden

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.3 (18 reviews)

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Some of our top rated extension builders in Willesden

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Chris
Rating: 5 out of 5
Extension Builder in Willesden
Hello, For the last few years I have been working in a construction company. During the pandemic, I decided to start working on my own.
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Latest review:
Handyman- 5 Mar 2026
Chris built some pax wardrobes for us, did a fantastic job from start to finish. Arrived on time, great quality of work and left the place looking spotless. I would highly recomend him
C.Ritz
Rating: 4.5 out of 5
Extension Builder in Willesden
30 y experience in making and fitiing kitchen , wardrobes , walk-in wardrobes , bar units etc. Own transport , flexibility , all branded tools needed for the job . Great cooperation with client , flexible working time New build , commercial and residential . On top : Timber frame Horses , log Cabins , roofs , pitched and flat . For and Windows fitting Make , deliver and fit luxury custom designed entrance and internal doors References available . 22 years on UK market .
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Latest review:
Carpentry- 19 Dec 2025
Absolutely superb! The best carpenter I have ever come across
Soho Building and maintenance Ltd
Rating: 5 out of 5
Extension Builder in Willesden
We are Soho Building and Maintenance Ltd, currently in our second year of business. We have an abundance of experience in the building industry with our own fully vetted trades including our own in house quantity surveyor for any large tenders. We undertake works of any amount no matter big or small, we can work with architects under minor works contracts
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Latest review:
Rear single story extension. Knocked wall out to extend kitchen. Craig -workman - very good. Lee and Dan project managed and were both excellent. Very please with everything, they turned up on time and when they said they would, cleaned up and finished build on time as agreed. I would recommend them to anyone.
Timall design& build Ltd
Rating: 5 out of 5
Extension Builder in Willesden
Timall Undertake all sort of building work including New Build, Refurb, extension, loft conversion.
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Latest review:
I received planning permission for a 3m extension, garage conversion and garden office with a toilet/shower and the architect recommended Timall. We of course carried out all our due diligence before selecting Timall as our builder. I received around 8 final quotes from various legal and reputable builders, and gratefully we chose Timall after checking their previous projects. Timall renovated my townhouse, stripped to brick, repartitioned to be more functional for my family, moved bathrooms, new kitchen etc. The council building control said we needed piling for the 3m extension, and Timall were fantastic to change their plans to carry out other internal work whilst a piling specialist was called in, who Timall also liaised with. The garden office, 3m extension and garage conversion all went well. Parminder the director was very hands-on during the project daily, with his builders on-site daily, honest in his advice, and very experienced in his knowledge of the building industry.
Window diy ltd
Rating: 5 out of 5
Extension Builder in Willesden
More than 15 years experience in the building trade. Carry out all building work from extensions to loft Conversions and renovations. Can assist in planning applications and structural drawings. Fensa Registered Company - More than 15years experience in the glazing field and construction field. Supply and installation of high quality UK made glazing products. 10 year warranty on all installations. Cover all of West London , Surrey, Bucks, North London.
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Latest review:
Windows & Doors (uPVC & Metal)- 13 Jul 2026
Works were carried out within schedule. Honest and reliable. Communication was good all the way through. Property was left clean and tidy. Would definitely recommend.
Ava Constructions & Decors
Rating: 4.9 out of 5
Extension Builder in Willesden
Ava Constructions & Decors Ltd is a UK-based construction and renovation company committed to delivering top-quality craftsmanship and reliable project management. We specialise in full refurbishments, extensions, bathroom and kitchen installations, and commercial fit-outs — always tailored to the client’s vision and delivered to the highest UK building standards. With a keen focus on transparency, timelines, and customer satisfaction, Ava Constructions has earned the trust of homeowners, investors, and developers alike. Punctuality and completion of work on time are a priority .Our team always respect the client wishes and work with them to achieve the best possible results to their satisfaction. Thank you in advance
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Latest review:
Extensions- 16 Apr 2026
I would not recommend this builder based on my experience. Instead of using crushed concrete they used soil to fill the house flooring for underfloor heating. 1 The project suffered from poor communication, repeated delays, and a lack of clarity around responsibilities. There were serious issues with the foundation works, which failed Building Control inspection and now require remedial engineering input before works can proceed. The site was also left incomplete and not in an acceptable condition. Despite substantial payments being made, key documentation, technical responses, and follow-through were lacking, leaving me to resolve major compliance and structural issues independently. My experience has resulted in delay, additional cost, and considerable stress. I would strongly advise others to ensure there is a detailed written contract, clear scope of works, and defined accountability
FKL
Rating: 5 out of 5
Extension Builder in Willesden
Hi thanks for taking the time to read my company profile, Form Construction specialise in extensions lofts basements and renovations. We strive to deliver quality workmanship. We pride ourselves on being quality tradesmen, always going the extra mile for our clients. We work with many different suppliers to ensure our clients get good value and good quality materials. If you feel we are suitable for your project please get in touch to discuss your project Many thanks John Campbell
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Latest review:
Kitchen Fitting- 3 Sep 2020
Very reliable, hard working and talented ! His quotation was incredibly reasonable too. Very grateful
Parrot Decorators Limited
Rating: 4.7 out of 5
Extension Builder in Willesden
🦜 Parrot builders Ltd offers a comprehensive service specialising in loft conversion, extensions,conversion and refurbishment We hold over 10 years experience within the construction industry providing a high quality of work
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Latest review:
Conversions - General- 21 Nov 2017
Hard working! arrived when he said he would and completed just as he said he would. Will I hire again, YES, looking to get a quote on a loft extension next. thank you for your hard work. see you again soon.
RA Designs and Build Ltd
Rating: 5 out of 5
Extension Builder in Willesden
We are a dynamic construction firm specialising in innovative design and high-quality building solutions for both residential and commercial projects. With a commitment to excellence and attention to detail, our team of experienced architects, engineers, and skilled tradespeople collaborates closely with clients to bring their visions to life. We prioritise sustainable practices and utilise cutting-edge technology to enhance efficiency and ensure the durability of our structures. From initial design concepts to final construction, we are dedicated to delivering projects that not only meet but exceed client expectations, creating lasting value and aesthetic appeal. Our customers consistently recommend us for our commitment to quality, attention to detail, and exceptional customer service. They appreciate our ability to turn their visions into reality while staying on schedule and within budget. Positive testimonials highlight our professionalism, seamless communication, and the collaborative approach we take throughout each project. Clients feel confident entrusting us with their building needs, knowing that we prioritise their satisfaction and work tirelessly to ensure memorable and successful outcomes.
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Latest review:
Excellent quality of work which has not caused any problems for many years. Efficient work style whilst keeping up a high standard of work.
HAMPSHIRES BUILDING & REFURBISHMENT
Rating: 5 out of 5
Extension Builder in Willesden
We are a trusted family run company with 18years experience working in full refurbishment and partial re-modelling of properties. We undertake all aspects of high end building work including Extensions, Loft Conversion, Electrics, Plumbing, bespoke Kitchens, Bathroom, Built-in furniture all decoration and flooring. We have worked all over London restoring Georgian, Victorian and Edwardian properties. We have worked with English Heritage, Grovsvenor Estates and many London based Architects.
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Latest review:
Extensions- 11 Jun 2017
Neil and his team were the perfect builders. They did the job, quickly & efficiently. Always on time. Very honest builders. We were so lucky to have picked them. Also a great team to have around. Thankyou Neil.
A1&PM Ltd
Rating: 3 out of 5
Extension Builder in Willesden
In our focus, we are interested in customer satisfaction, we provide guaranteed quality, we have the capacity to start work for the customer when he wants it at any time, and undoubtedly we have the most competitive prices in the market A1&PM is your home company, we are ready at any time, for any type of work and at any price, we will do your work
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Latest review:
Bricklaying- 28 Jan 2025
I recently hired A1&PM to carry out structural repairs on my house, including replacing window lintels and providing complex temporary works to support the structure during the repairs. They also patched plaster, skimmed a wall, rendered, and repointed an external wall. From start to finish, the team was professional and reliable, turning up on time with all the necessary tools and materials. Protecting carpets and covering furniture. Their knowledge and expertise were evident throughout, and they completed the work exactly as promised. The pricing was very competitive, and the quality of the work exceeded my expectations. I was initially sceptical due to some past review, but my experience couldn't have been better. I would definitely use their services again and wouldn't hesitate to recommend them to others. Fantastic work—thank you!
Km Building Specialists Ltd
Rating: 3 out of 5
Extension Builder in Willesden
KM Building Specialists is dynamically developing company created by people with passion. Our mission is professional advice, meeting expectations and, as a result, obtaining satisfaction of all our clients. We work closely with various construction specialists (electricians, gas-safety experts, architects, garden designers) to enable us to deliver the top class service and to ensure that the safety building regulations and codes of practice are followed.
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Latest review:
A single storey extension. Bedroom chimney place knocked down. Patio to the rear. Marek was very hardworking, professional and tidy. He was at my home every day and alway very early and always worked until late to get the job done
Angle Construction
Rating: 4.7 out of 5
Extension Builder in Willesden
We have been in the construction business for over 15 years doing all sorts of works, from minor works to full home constructions. No job to small no job to big. We work in and around London
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Latest review:
Windows & Doors (uPVC & Metal)- 28 Jan 2026
Very unhappy with how things went with Angle Construction overall. Poor comms during the transaction was the first red flag - no communication for 2 days the moment money was sent, however afterwards received an apologetic call - parts ordered and arrived in due course. Andrei turned up, and got to work on removing the old gate, but then started shaving down the post without saying anything -we were told after that the posts were not level. Eventually he said the door would need to be cut, which we agreed to. The door and posts were both cut to fit, but massive gap left at the bottom, and only half of the door fittings and no handles were installed! In addition, where the door was cut and the wood shaved made, a lot of mess was left all over the garden furniture and patio floor. Shocked at the lack of care and professionalism. He was clearly agitated and in a rush to leave. We have a working back door, but it looks like a real botched job. Not happy, and I would not recommend.
new vision construction(uk) ltd
Rating: 5 out of 5
Extension Builder in Willesden
New Vision Construction (UK) Ltd is committed to provide the highest quality professional construction services. This commitment can only be maintained through the efforts of its people. We provide quality construction services to our clients. The pride we have in our work enables our clients to enjoy the construction process with confidence.The craftsmanship quality we produce is visible in all our finished projects regardless of the projects size.
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Latest review:
Bathroom Fitting- 17 Jul 2020
Very professional & skilled builder. Aswell as a full bathroom refurbishment he took extra time on the small details to really make it a special end result. Me & my family are very pleased with Ranjits work. A very helpful and knowledgable man. Thanks Ranjit for a great bathroom for me & my family to enjoy.
Artizan landscapers ltd
Rating: 4.9 out of 5
Extension Builder in Willesden
I have been doing garderning for over 20 years i have 8 certificates in gardening i have done domestic gardens and comerecial gardens
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Latest review:
Garden Maintenance- 2 May 2026
A++
AIA BUILDING CONTRACTORS LTD
Rating: 5 out of 5
Extension Builder in Willesden
Our Family run business is built purely on word of mouth and on our reputation with genuine authenticated reviews available on our website. we take pride in all aspects of our work from home improvements inside and out, Bathroom Refurbishment, New Roofs, Painting and Decorating, Loft Conversion, Rear Extension, Velux windows, Roof Repair, Gutters and Drain pipes unbloking
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Latest review:
Bathroom Fitting- 25 Mar 2022
Fantastic job very pleased with my bathroom under the stair. Thank you Ben. Pamela Robinson

4.3

Top rated Extension Builders

Our Extension Builders in Willesden, are rated 4.3 out of 5 based on 18 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Willesden?

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

Find extension builders in Willesden with MyBuilder

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

Step 2: Compare different extension builders in Willesden

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

Step 3: Hire Willesden extension builders with confidence

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

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

What to ask a Willesden extension builder before hiring?

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

An extension builder in Willesden 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 Willesden 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 Willesden?

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 Willesden 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 Willesden 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 Willesden

Can an extension builder in Willesden help with planning permission?

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

Many Willesden 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 Willesden help with materials and finishes?

Yes, most extension builders in Willesden 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.