Extension Builders in Isleworth

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (20 reviews)

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Some of our top rated extension builders in Isleworth

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IQSURV LTD
No reviews yet
Extension Builder in Isleworth
IQSURV LTD is a RICS Regulated Firm and is a Chartered member of CIOB. The premier destination for top-quality refurbishment and construction services. With years of industry experience, we specialize in transforming spaces into stunning, functional environments. At IQSURV, we understand the significance of creating a space that reflects your unique vision while meeting specific requirements. Whether it’s a residential property, commercial space, or large-scale project, our skilled professionals are here to bring your ideas to life.
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ENGLEFIELD CONSTRUCTION
No reviews yet
Extension Builder in Isleworth
We are a family run business of 3 carpenters that have experience in building for over 15 years. we always try our best to meet the customers needs and we take pride in what we do. We have always said to treat it as if it was our own property, take care in the quality of the work we provide. Hopefully will see you soon! Steve Tom Ben Englefield
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ANACOND LTD
Rating: 5 out of 5
Extension Builder in Isleworth
Throughout the years in construction my father has gathered well balanced team with broad range of experience in every aspect of the job. After acquiring my engineering degree and some experience elsewhere, I re-joined my father once again to provide the service we are both proud of. Our background and experience in construction, design and engineering allows us to provide our clients with high quality service and ensure smooth work-flow of each project. Attention to detail is the key!
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Latest review:
Ground floor rear extension and Loft conversion. First and Second fix works including drainage, structural (block work, wood work and steel work) electrical, plumbing, plastering and tiling. All works completed to a very high standard, we found Arnolda's and his team very helpful, thoughtful and pro-active nothing seemed to be too much trouble for him, we are more than happy with AnA's Construction Developments.
H&J Properties 02 Ltd
Rating: 5 out of 5
Extension Builder in Isleworth
H&J Properties is your friendly, reliable small team with over 10 years of experience in the building industry. We design, plan, build, and project manage, so you can rely on us for a full round of service. From floor and wall tiling to full kitchen and bathroom installations, we’ve got your home covered. We handle plastering, painting, drylining, insulation, and more with precision and pride. Need a loft, rear or basement extension, a new roof, or concrete work? No problem. Whether it’s bricklaying, basement waterproofing, or installing windows and doors, we bring craftsmanship and care to every job. Big or small, we build it right. Please message us directly for more project images.
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Latest review:
We have contracted H&J Properties for our house refurbishment in London. I was impressed with the team's professionalism and project management from start to finish. We had no plans or planning approved, so we wanted a design and build company who will be able to look after the project from start to finish. They did just that. Working with the architects and the planning application before starting the project planning. As always, there are, of course, unforeseen issues arising with the old houses in london but I could't be happier with the communication received from the team. Thanks for the great job.
P.R GROUNDWORKS
Rating: 5 out of 5
Extension Builder in Isleworth
P.R GROUNDWORKS is a family run business, I’ve been working in the building trade for 20+ years, covering all aspects of groundwork, landscaping, foundations, underpinning, brickwork driveways, including drainage and pipe work. I also cover all tree surgery and stump removal. I strive to maintain excellent customer service and ensure my client is happy and regularly informed on any updates and progress of the work being carried out. I have recently been working with an ongoing contract at Hever castle resurfacing the main public car park, renewing public walk ways as well as building the new sand play area for the children. I take immense pride in my work and will endeavour to provide 100% customer satisfaction. I will always go above and beyond the clients expectations and will endeavour to bring your envision to reality. Please feel free to contact me should you require a free quotation or just some knowledge regarding specialist work.
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Latest review:
Extensions- 14 Mar 2024
We had the best experience with Paul and team from the beginning and would 100% recommend him for any job. From the beginning the communication was great, he gave a quote and then didn't chase us for an answer as there was a couple months in between before we confirmed. Once confirmed, he booked a date in. Tim and James turned up at 7.45am every morning, lovely guys who got on with the job and were always polite and friendly. They were also extremely clean and tied up everything as it was before they left. So happy with the finished job and definitely use again for any further work. Thanks Paul, Tim and James!
BSB Builders
No reviews yet
Extension Builder in Isleworth
With 15 years of experience in the building trade, I offer a full range of building services, specialising in tiling, plumbing, painting, and extensions. I have built a strong reputation for quality workmanship and reliability, earning excellent reviews from my clients. My work spans both residential properties and commercial spaces, including high-end clothing stores. I take pride in delivering professional results, no matter the project size. I am based in West London and cover all of London and outer London. My main priority is client satisfaction and making sure my client is happy with the work we do. As a homeowner myself, I am aware of the clients situation and the importance of doing what my client wants to the best standard possible.
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Beeches Building Ltd
Rating: 5 out of 5
Extension Builder in Isleworth
Beeches Building undertakes all manner of construction jobs, specialising in residential extensions and refurbishments. With loads of experience and a truly international team, we bring a unique and exciting perspective to every project.
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Latest review:
Nathan and his team were fantastic. I urgently needed a kitchen refit in a rental property between tenancies. Nathan anticipated my every needs. They were fast, efficient and paid great attention to detail. I would highly recommend them and I would use them again.
JP Builders
No reviews yet
Extension Builder in Isleworth
I have been a bricklayer for over 30 years. I am always on time, work effectively and like to engage with the customer to ensure a good end result.
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Plustudios LTD
No reviews yet
Extension Builder in Isleworth
Space Up is a trusted general contracting firm specializing in residential construction projects. With a focus on excellence and customer satisfaction, we deliver high-quality results on time and within budget. Our experienced team works closely with clients, prioritizing clear communication and attention to detail to ensure every project exceeds expectations. From new construction to renovations, count on Space Up for superior craftsmanship and reliable service.
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Urban Construction Management Limited
No reviews yet
Extension Builder in Isleworth
We have been in business since 2015, and working with a number of leading contractors within the construction industry in the country. We have carried out works from new builds to refurbishments, and specialise in loft conversions and extensions, garden rooms, kitchens and bathrooms, and structural alterations. We have all the relevant insurance - employment liability, public liability and professional indemnity cover. We are certified by Construction Line, CHAS, Safe Contractor and BMTrada (Fire Door Installer).
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Signature 1 Construction Ltd
Rating: 4.5 out of 5
Extension Builder in Isleworth
Signature 1 Construction LTD is a family run business with over 25 years experience in the building industry. We specialise in extensions, loft conversions and full house refurbs. Every job we undertake we take great care of the clients house and are experienced project managers will look after you from start to finish.
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Latest review:
Extensions- 30 Sep 2025
Overall, I’m very pleased with the work Marin has carried out for us and I’m currently in the process of instructing him to do more work. Marin built a high spec cedar shed for us with electrics and plumbing, some brickwork and laid composite decking. Marin came across, honest and reliable, which in itself is rare. He was on site most mornings to make sure his tradesmen were on the right tracks. Like with a lot of these things there were some issues along the way and I was highly impressed by Marin’s ‘no quibble’ approach to rectify any problems. I myself have a high attention to detail and am quite indecisive (nightmare client) and Marin was happy to work with me with changes to the project without incurring extra costs.
LEBELLE HERITAGE & RESTORATION LTD
Rating: 5 out of 5
Extension Builder in Isleworth
Lebelle Heritage & Restoration Lebelle Heritage & Restoration is a professional building and construction company specialising in renovations, refurbishments, and heritage restoration. We take on all types of projects, from full property renovations and structural upgrades to detailed interior finishes and the careful restoration of period features. Our team is skilled in both traditional craftsmanship and modern construction methods, allowing us to deliver work that is reliable, high-quality, and built to last. Whether we’re restoring the character of an older property or breathing new life into a modern home, we focus on precision, honesty, and clear communication throughout every stage of the job. We pride ourselves on delivering clean, efficient, and well-executed work that meets the needs of our clients and respects the integrity of each building. At Lebelle Heritage & Restoration, we build, renovate, refurbish, and restore with a commitment to quality and long-term durability.
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Latest review:
After a previous contractor took our money and left our loft extension unfinished, we were devastated and worried about how we would ever get our home back to normal. Then Lewis from Lebelle stepped in and completely turned things around. Lewis was patient, understanding, and incredibly professional. He worked quickly, kept costs under control, and finished the loft extension to a standard we’re so happy with. The stress he took off our shoulders was unbelievable. We honestly can’t thank Lewis enough. If you’re looking for someone trustworthy, skilled, and genuinely caring, Lebelle is the company to call.
JT Developments
Rating: 4.7 out of 5
Extension Builder in Isleworth
Hi, I have been lucky enough to have a family who have a well established building company and I've learnt a great deal from them. I have also been a foreman on a site, building nursing homes so i gained alot of experience through that. I am a very clean, tidy worker and I always make sure the job is exactly as the customer wants it.
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Latest review:
Bricklaying- 25 Oct 2024
JT Developments knocked down and re-built my wall at the front of the property. They did such a great job I am over the moon with how it's transformed the curb appeal of our home! Really polite, always on time and very very clean and tidy. Also reasonably priced which is a bonus!
MHA Group Construction Ltd
No reviews yet
Extension Builder in Isleworth
London’s finest refurbishment and home improvement company. We offer a wide range of services and deliver projects to the highest standards.
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PureBuild.
No reviews yet
Extension Builder in Isleworth
Very Proffesional. Punctual at all times. Work done to the highest standard at good prices. Over ten years Experience in all aspects of build work including Lofts and Extensions.
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I.d london construction ltd
No reviews yet
Extension Builder in Isleworth
Extensive knowledge of new build and renovations. Family run business. Specialise in loft conversions, kitchen and bathroom renovations
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4.2

Top rated Extension Builders

Our Extension Builders in Isleworth, are rated 4.2 out of 5 based on 20 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Isleworth?

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

Find extension builders in Isleworth with MyBuilder

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

Step 2: Compare different extension builders in Isleworth

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

Step 3: Hire Isleworth extension builders with confidence

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

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

What to ask a Isleworth extension builder before hiring?

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

An extension builder in Isleworth 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 Isleworth 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 Isleworth?

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 Isleworth 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 Isleworth 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 Isleworth

Can an extension builder in Isleworth help with planning permission?

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

Many Isleworth 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 Isleworth help with materials and finishes?

Yes, most extension builders in Isleworth 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.