Extension Builders in Isleworth

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (26 reviews)

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Some of our top rated extension builders in Isleworth

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DECOHOMES LIMITED
No reviews yet
Extension Builder in Isleworth
Decohomes Limited have been established over 14 years . We are an experienced company who can help with all aspects of building trade. We are specialised in LOFT CONVERSIONS AND EXTENSIONS, KITCHEN, BATHROOM AND HOME REFURBISHMENT. COMPETITIVE PRICES!!
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Dioni construction ltd
Rating: 5 out of 5
Extension Builder in Isleworth
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
Pardeep Hunjan
Rating: 4.9 out of 5
Extension Builder in Isleworth
Experienced builder for all types of work, prioritising quality and customer satisfaction above anything else
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Latest review:
Bathroom Fitting- 31 Jul 2025
Highly recommended. Great communication, clean, punctual and honest.
CTilers
Rating: 4.9 out of 5
Extension Builder in Isleworth
We provide professional, reliable services with a primary focus on specialized tiling and small home maintenance. Our priority is customer satisfaction. Previously “HandyHands”
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Latest review:
Tiling- 16 Aug 2026
Excellent, very professional
GSS Develoments LTD
No reviews yet
Extension Builder in Isleworth
We are an established construction company operating since 2006. We do house extensions, Loft Conversions, and full refurbishment work.
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FBF Construction Ltd
Rating: 5 out of 5
Extension Builder in Isleworth
We take all types of jobs from demolish a house and rebuild at the highest standards.
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Latest review:
Florin extended and completely refurbished our 4-bedroom semi-detached house. This included extensive steelwork, underfloor heating, complete re-plumbing and rewiring, excavation, and an entirely new slate roof as well as varying extensions up to three floors high. I cannot say enough good things about his workmanship, professionalism and reliability. His workmanship makes a perfectionist like myself happy. He is also completely professional: even with our difficult neighbours he was always courteous and understanding, and even helped them sort out issues at a moment’s notice that had nothing to do with his building work on our property. And he is also thoroughly reliable. I cannot think of any instance where he committed to something and did not deliver — he even managed to finish all the work on our house ahead of schedule and on budget. We have been so happy with his work that we contracted him to build us a summer house as well, from scratch, and to complete revamping our front garden including elements of hard landscaping. Again he delivered flawlessly and we are very happy with the result. We also continually receive positive comments from people passing by and just seeing the front garden. We have used several other builders in the past on other properties, including far more expensive ones, and none compare to his level of competence, attention to detail in his workmanship, his complete professionalism and thorough reliability. Now that we have found Florin, we will never look for another builder again. I just hope once others experience what he delivers for themselves he will still have some availability for us in the future!
Taj building services
No reviews yet
Extension Builder in Isleworth
As Manjeet Singh Multani of Taj Building Services, I bring a commitment to quality and precision to every project. With years of experience, I ensure that each build is not only structurally sound but also aesthetically pleasing, tailored to your specific needs and vision. My dedication to customer satisfaction, combined with transparent communication and reliable service, makes Taj Building Services the trusted choice for bringing your construction dreams to life. Our approach is collaborative, working closely with you to understand your needs and preferences, ensuring the final result exceeds your expectations. Whether it's a new build, renovation, or extension, Taj Building Services combines traditional craftsmanship with modern techniques to create spaces that are both functional and beautiful. We are fully insured and compliant with all building regulations, giving you peace of mind throughout the entire process.
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Bajaj&son's trade Ltd
No reviews yet
Extension Builder in Isleworth
Hi, I'm mandeep bajaj a reliable and experienced tradesperson with a strong commitment to quality and customer satisfaction. I specialise in loft extension, driveway,garage,bathroom fitting, plumbing, tiling, etc.] and take pride in delivering high-quality workmanship on every job, no matter the size. With 10 years of experience, I have the skills and knowledge to complete your project efficiently and to the highest standards. I’m punctual, tidy, and respectful of your home, and I believe clear communication is key to a successful project. Whether you need help with a full bathroom renovation or a small repair, I’ll work with you to make sure the job is done right. Feel free to get in touch—I'd be happy to discuss your project and provide a free, no-obligation quote. --- Let me know if you'd like this tailored further for a specific trade or service.
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Patryk
No reviews yet
Extension Builder in Isleworth
Hello. I am experienced multitrader in London for nearly 20 years. Can do most of the building aspects. Always do my work to the highest standards. Looking forward to show that. Kind Regards. Patryk.
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Nexus Lofts And Extensions Ltd
No reviews yet
Extension Builder in Isleworth
Nexus Lofts and Extensions based Ealing west London family running business specialist on lofts and home extension ! Local homeowners trust Nexus because we put your needs first. We’re committed to transparency, quality, and delivering projects on time and within budget. Our reputation across Ealing & West London is built on honest workmanship and a genuine dedication to customer satisfaction. If you’re looking for dependable builders who make every step easy, we’re here to help bring your vision to life. Why Choose Us Build with confidence backed by our 10-Year Warranty. At Nexus, we take pride in delivering high-quality workmanship that stands the test of time. Our long-term warranty protects your investment and gives you peace of mind, knowing your project is built to last. Reliable service and durable results — that’s the Nexus promise. 10 Year Warranty For any enquiry please Get in touch
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Razvan Consttruction Ltd
Rating: 5 out of 5
Extension Builder in Isleworth
Razvan Consttruction Ltd is a company with a solid team of builders with experience of 20 years!
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Latest review:
We had a lot of work done including a brand new roof, whole rear and side extensions. New driveway. Landscaping. Complete fit out works inside. I wouldn’t hesitate to recommend Razvan- he is a complete professional and a really nice guy. Honest and hardworking and takes pride in his work. Out of all of the builders I have used Razvan is the only one I would use again.
Sebastiano Vuksani
Rating: 5 out of 5
Extension Builder in Isleworth
Build your dream with SV building construction ltd Regards
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Latest review:
Extensions- 30 Jan 2023
I had the pleasure of having them carry out a single story extension and fibreglass new roof of my property. I found they always turned up when specified and carried out fantastic quality work for a competitive price. Not being a builder you have to place trust in a person / company. They always made sure that we were happy keeping us updated with the project every step of the way. They were kind and considerate to our neighbours making sure they were not loud early in the morning or late in the evenings making the whole process run smoothly. I can not stress enough how great these guys are. Thanks
Sevalay Brickwork Contractors ltd
Rating: 5 out of 5
Extension Builder in Isleworth
Titan Groundworks are a family run Groundworks company with over 25 years experience in the industry. We provide a safe and reliable service for all of your Groundworks needs
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Latest review:
Wide rear extension, double storey side extension. Works were completed to a high level finish, I’m quite a particular person and the fact I didn’t have to spot out certain finishes put a smile on my face. Professionalism was consistent always giving updates when I asked and guidance on milestone deadlines which made their reliability brilliant as they main site managers constantly engaged in weather forecasts in the event of weather disruptions and times they would be on site during the week as well as what Saturday’s they were available. Well deserved review.
Fateh design and build Ltd
No reviews yet
Extension Builder in Isleworth
Fateh design and build
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DHARAM BUILDERS LTD
No reviews yet
Extension Builder in Isleworth
Welcome to Dharam Building Services, your trusted partner in construction and home improvement for over 15 years. With a passion for quality craftsmanship and a commitment to exceptional customer service, we specialize in turning your home improvement dreams into reality. Whether you're planning a renovation, need repairs, or want to enhance the functionality and beauty of your living space, we’ve got you covered. Our expert services include tailored consultations, drywall repair, exterior and indoor painting, flooring installation, and custom garage designs. We also offer general repairs and maintenance to keep your home in top shape, home extensions for added space, water fixture repairs, and tile work installation for lasting aesthetics. For those looking to maximize space, we specialize in loft conversions and extensions, providing you with more room to grow. At Dharam Building Services, we combine over a decade of experience with attention to detail to ensure every project is completed to the highest standards. Our satisfied customers speak for us, and we invite you to read their reviews on Google. Contact us today to discuss your next project—we look forward to helping you transform your home!
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ASC
Rating: 5 out of 5
Extension Builder in Isleworth
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.

4.1

Top rated Extension Builders

Our Extension Builders in Isleworth, are rated 4.1 out of 5 based on 26 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.