Loft Conversion Companies in Isleworth

Name: Loft Conversion Company
Brand: MyBuilder
SKU: loft-conversion-company
Rating: 4.3 (10 reviews)

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Some of our top rated loft conversion companies in Isleworth

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Ion
Rating: 4.7 out of 5
Loft Conversion Company in Isleworth
We are a great quality team in west london/heatrow , travelling up to 50 miles for the jobs, offering the best working conditionsfor:✅Extensions ✅Garden walls ✅New builds ✅Garages
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Latest review:
Bricklaying- 26 Oct 2024
The work was completed to satisfaction and on time. Quality was great and the brickwork blended into exiting wall.
Foryourservice
Rating: 5 out of 5
Loft Conversion Company in Isleworth
With over 20 years of experience, we are a full-service construction company based in London, serving London and surrounding areas. From start to finish, we handle every aspect of your project, including general construction, subcontracting, plumbing, electrical work, and more. Our team is committed to delivering high-quality workmanship and reliable service, whether it's a residential renovation or a commercial build. We take pride in providing comprehensive solutions tailored to meet your needs, ensuring each project is completed on time, on budget, and to the highest standards.
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Latest review:
Painting & Decorating- 7 Dec 2021
I chose Fayn as it provides detailed breakdown on a written quote, similar way of quote for large construction project. I hire it to do two two jobs - #1 repair previous flush light damage; #2 repair painting hook holes. I am happy with the job #1 but job #2 could have done better. For job #1, he has kept the place clean and tidy, ceiling area near flush light becomes smooth and nice. He is polite. For job #2, I was hoping to hide the tiny painting hook holes but they end up enlarged marks on wall. I must say the paint color I got isn’t quite matching, also a matter of new and old paint. I would appreciate him letting know me the color isn’t right after applying to the first hook instead applying to all, as well as using a smaller brush for tiny holes. He helps finding solutions by mixing paint. But every touch up just extends the area, so I had to tell him to start small for testing. He tried hard to make the mark less obvious.
Omar
Rating: 5 out of 5
Loft Conversion Company in Isleworth
I have long experience with the Building job
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Latest review:
Handyman- 23 Apr 2024
Very friendly and easy going personality. Knows his stuff and always willing to achieve perfection! Would definitely recommend !!
Mansell Construction
Rating: 5 out of 5
Loft Conversion Company in Isleworth
Mansell Construction are a family run company that has been in the building trade for over 30 years. We have a passion to deliver every project we take on, no matter how big or small to the highest of standards. We take pride in having a friendly and clear approach. We specialise in all kinds of work including - Extensions - Loft conversions - Roofing - Bricklaying - structural alterations - Steel RSJ installation - conversions - Plastering/Rendering - Driveways/Patios - Fencing and more.
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Latest review:
Bricklaying- 16 Mar 2023
Good brickwork and plastering very neat work , would recommend them . John
Project-Wise
Rating: 5 out of 5
Loft Conversion Company in Isleworth
We offer a friendly reliable service that is second to none and can put you in contact lots of past clients who will give us glowing references on request. I have spent 30 years in the building industry, a time served bricklayer who has gained a very good knowledge of all aspects involved and trade requirements. This is why I offer a service you can rely on and guarantee all our work, which is carried out to the highest standard.
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Latest review:
Bricklaying- 16 Sep 2015
Two good Brickies did a grey job on building a double cavity wall on my garage / gym. Really pleased with the wrk, everything plumb and level, nice finish on the mortar joints of the outer red brickwork. Would definitely use these guys again.
Ceka Construction Limited
Rating: 5 out of 5
Loft Conversion Company in Isleworth
Ceka Construction Ltd covers all aspects of building works. Each team member is an expert in his field. We pride ourselves on being reliable, professional, efficient & hard-working, with an excellent reputation. Most of our work comes via word-of-mouth.
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Latest review:
Joinery & Cabinet Making- 20 Jan 2010
Ceka Construction fitted new skirting boards and picture rail aswell as removing the current skirting board first. From start to finish the service was Excellent. They responded back to any question i had very promptly and the quality of work carried out was of an exceptionally high standard. Roland was very flexible with his time to get the job done with my timeframe requirements and the Carpenter Vini worked fast, of very high quality and cleaned up afterwards. I would highly recommend Ceka Construction to anyone as they were completely professional and reliable.
Connect Maan Builders Ltd
Rating: 5 out of 5
Loft Conversion Company in Isleworth
cmbj
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Latest review:
They handled the project professionally as promised, Highly Qualified team and have technically knowledge of all aspects
Blueprint Developments Limited
Rating: 5 out of 5
Loft Conversion Company in Isleworth
Welcome to Blueprint Builders, where your dream space becomes a reality. Nestled in the heart of London, our team is at the forefront of design and construction innovation. We specialize in transforming spaces into luxurious living experiences, with services that include: - Elegant House Extensions - Meticulous Loft Conversions - Comprehensive Renovations - Bespoke New Builds And a wide spectrum of commercial and domestic building projects designed with your luxury and comfort in mind. At Blueprint Builders, your satisfaction is not just a goal—it's our promise. We're dedicated to bringing smiles to our clients faces through meticulous attention to detail, unparalleled craftsmanship, and a seamless client experience from start to finish. Stay connected with our journey of transformation on Instagram @blueprintbuilder. Follow us for a regular dose of inspiration through updated photos of our latest projects. Dreaming of a space makeover? Don't wait any longer. Contact us today for a complimentary site visit and a personalized quote. Let's make your vision a living, breathing reality.
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Latest review:
We recently had our 3-bedroom house renovated, along with a new rear extension build and a garage conversion, and I couldn't be happier with the results. The team demonstrated exceptional craftsmanship and attention to detail throughout the project. From the initial consultation to the final handover, they were professional, reliable, and transparent about costs and timelines. The renovation completely transformed our home, enhancing both its functionality and aesthetics. The rear extension seamlessly integrates with the existing structure, creating a spacious and light-filled living area, while the garage conversion provides a versatile space we can now use as an office. The team was approachable, accommodating any changes we requested during the build, and always left the site clean and organized at the end of each day. I was particularly impressed with their ability to stay on schedule despite some challenging weather conditions. If you're looking for a dependable team that delivers quality work, I highly recommend Blueprint.
All 4 Property Ltd
Rating: 5 out of 5
Loft Conversion Company in Isleworth
All 4 Property Ltd is a company which successfully meets its customers’ expectations. With 15 years combined experience we provide a professional and honest service from design to completion. Whether you want a loft conversion, an extension or just a new bathroom, All 4 Property will deliver it
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Latest review:
Loft Conversion- 14 May 2024
Hard to fault Marius and his team.
Adam Renovations Ltd
Rating: 5 out of 5
Loft Conversion Company in Isleworth
Adam Group Ltd is an established residential construction and development company, incorporated in 2010, specialising in high-quality refurbishments, extensions, loft conversions and new build projects across London and the South East. We work with homeowners, investors and local authorities on projects ranging from £150,000 to £3 million, covering everything from full house refurbishments and structural reconfigurations to large-scale extensions, loft conversions and ground-up developments. Since inception, we have successfully delivered over 250 projects, building a strong track record for reliability, quality and consistent delivery. In 2025 alone, the company achieved a turnover of £4.5 million, reflecting both our capacity and the level of projects we undertake. Our team provides an end-to-end service, including planning coordination, structural works and full construction delivery. We are experienced in working alongside architects, engineers and local authorities to ensure projects run smoothly and comply with all regulatory requirements. We maintain a 4.9-star rating on Google, with the majority of our work coming from repeat clients and referrals — a testament to our professional approach, clear communication and attention to detail. If you are planning a refurbishment, extension or new build and want a contractor with a proven track record and the capability to deliver complex residential projects, we would be happy to discuss your requirements.
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Latest review:
Loft Conversion- 5 May 2017
Artjom and his team have done a wonerful job on our loft conversion and house renovation. We are very pleased at the transformation. Although not the cheapest quote we obtained, they were highly professional, kept the noise down and cleaned up after themselves. We also added several other jobs to our initial quote and they undertook these as requested. It is important to keep a record of everything you ask to be done. They worked very fast and were able to complete everything within 2 months - it helped that our house was empty at the time, so they didn't have to deal with us living there at the same time as the works were being carried out. Overall, I would highly recommend Adam Renovations for any building works you need done to your property.
ST Maintenance London Limited
Rating: 5 out of 5
Loft Conversion Company in Isleworth
Welcome to ST Maintenance London, Are you looking for top-quality painting, decorating, and general maintenance services? You've come to the right place. With 15+ years of experience, we pride ourself on delivering exceptional craftsmanship, attention to detail, and reliable service that transforms your space into something extraordinary. Whether it's a fresh coat of paint, a complete redesign, or essential upkeep, were committed to ensuring your satisfaction. Let’s make your vision a reality—efficiently, affordably, and beautifully. Contact me today to discuss your next project.
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Latest review:
I had the pleasure of Charlie and Kurt coming to do some work for me at one of my properties as the place hadn’t been touched in years and needed some serious TLC! They had replaced the ceiling in the bathroom, redone the decking and refitted some appliances as well as repairing the pointing outside and redecorating the entire house. This was a big job as the house is old and had defects all over in awkward places but they made sure to complete all touch ups to ensure the finish was to a good standard. They even tidied up the garden and had replaced some benches I had outside for free which was very much appreciated. Definitely recommend them for any jobs locally big or small! Thanks again guys :)
ROBERT RYCERZ
Rating: 5 out of 5
Loft Conversion Company in Isleworth
Welcome to our professional house renovating company, where craftsmanship meets innovation. With years of expertise, we transform spaces into stunning, functional homes. Trust us to elevate your property to its fullest potential. Let's renovate your dream home together.
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Latest review:
Handyman- 24 Feb 2020
Robert was very professional, worked tidy and did a great job. I was pleased with his work.
Chandi bros limited
Rating: 5 out of 5
Loft Conversion Company in Isleworth
People know us for best finish. Having more than 15 years of experience in building work. No job big or small for us.we love what we do. You will get Perfect finishing for your job. We will finish the job on time. No delays!!
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Latest review:
Bathroom Fitting- 13 Apr 2024
Sahib singh and his team are very professional and helped me complete my requirement in a cost effective and very patient in his work. very attentive and am happy to recommend him for any work at your place.
JKD building service
Rating: 5 out of 5
Loft Conversion Company in Isleworth
14 years experience with House extension, loft conversion, kichen, bathroom and many more.
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Latest review:
Bathroom Fitting- 22 Nov 2019
Perfect job and attention to detail. Wall & floor tiles look perfect. Very tidy, clean and hard working builder. Nothing seemed to be a problem. I also painted the wall. Love the bathroom now. Thank you !
Axe Construction Ltd
Rating: 5 out of 5
Loft Conversion Company in Isleworth
Hello and welcome to Axe Construction Ltd. If you are thinking of renovating your home, building an extention or arranging general maintenance in your property, we are here to help. Our priority in job is to deliver high standard service to customer’s satisfaction.We offer a professional and friendly service to all private and commercial clients in and around London We are always go above and beyond to satisfy our clients.We are happy to provide references from our clients and arrange site visit
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Latest review:
Loft Conversion- 24 Jul 2021
I have to say I was very impressed with Axe from the outset. Ed the project manager clearly knew what he was talking about and was able to come up with suggestions and guidance whenever a decision was needed. He provided an up-front itemised quote, and this was stuck to. The team of workmen led by Avram did an excellent job and I am very happy with the finished product. Avram in particular was a superstar: high quality workmanship, creative solutions to problems, hard-working and most importantly he takes a pride in his work as if it were his own house. Plus, he noticed a tiny leak in the roof unrelated to the project which he fixed at no extra charge. Recommended - I would use them again.
Afraz Naqvi design studio ltd
Rating: 4.8 out of 5
Loft Conversion Company in Isleworth
We are an architectural practice based in West London, With over 20 years of experience. We work on anything relating to architecture. We are rebranding and and our new account is ANDS Architecture + Build Thinking of redesigning/extending your home? Have land you want to build on? You have an idea and want to see if it's possible to build on it, then we can help. Our unique approach guides you through the planning or construction phase. No matter the size of your project, ANDS has everything you need to unlock your property’s potential.
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Latest review:
Architecture- 23 May 2026
We had a really great experience working with this architect team. They were friendly, professional, and easy to communicate with throughout the whole project. They listened carefully to our ideas, gave us practical advice, and suggested smart design solutions we hadn’t even considered. Their guidance really helped us make better decisions and avoid costly mistakes. The final result turned out even better than we expected, and the whole process felt smooth and stress-free. Definitely recommend them if you’re looking for creative architects who also give honest and helpful advice.

4.3

Top rated Loft Conversion Companies

Our Loft Conversion Companies in Isleworth, are rated 4.3 out of 5 based on 10 reviews from customers like you.

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What services are offered by loft conversion companies in Isleworth?

Converting a loft often entails many jobs - some of which you likely haven’t even considered! Fortunately, a professional loft conversion company in Isleworth will be able to handle multiple services, ensuring your transformed loft is fit for purpose.

Some of the services loft conversion companies can provide include:

Full loft conversions: Complete design and build projects when structural alterations are needed
Dormer loft conversions: Add extra headroom and floor space with a dormer extension
Velux or rooflight conversions: Ideal for lofts with good existing height; minimal structural change required
Hip-to-gable conversions: Extend the sloped roof to create more usable space
Mansard conversions: A major structural change offering maximum space.
Loft storage conversions: Add flooring, lighting, and insulation for clean, usable storage
Skylight or roof window fitting: Install natural light solutions like Velux windows
Staircase installation: Design and build bespoke stair access to your new loft
Insulation, heating, and ventilation upgrades: Ensure comfort and compliance with energy standards
Design and planning services: Architectural drawings, planning permission, and building regulation approval

Post your job to MyBuilder and you'll be matched with loft conversion companies in Isleworth who are interested and available to help. And with the reviews of past customers and the freedom to compare the quotes of similar tradespeople, all in the same place, the ball’s in your court.

Average costs of loft conversion companies in Isleworth

Loft conversions tend to be charged on a project basis, rather than by the hour, as they often involve weeks or even months of work.

The cost of your loft conversion depends on a few things, including the style of loft conversion and materials you choose and the size of your property.

That being said, here are average prices for common types of conversion work:

Full loft conversions: £45,000–£70,000+
Dormer loft conversions: £55,000–£85,000+
Velux or rooflight conversions: £25,000–£45,000
Hip-to-gable conversions: £50,000–£80,000+
Mansard conversions: £70,000–£100,000+
Loft storage conversions: £10,000–£20,000
Roof window fitting or skylight installation costs: £1,000–£2,500 per window
Staircase installation costs: £2,000–£5,000
Insulation, heating, and ventilation upgrades: £2,000–£6,000
Design and planning services: £1,500–£4,000

Take a look at our guide to loft conversion costs to get a more detailed breakdown of the different options available when using a Isleworth loft conversion company.

Find a loft conversion company in Isleworth with MyBuilder

When you’re planning major work like a loft conversion, you’ll want to find the right tradesperson for the job. The great news is, MyBuilder has already done all the time-consuming work for you.

All you need to do is post your job on MyBuilder, completely for free, and we’ll share it with loft conversion companies near you in and around Isleworth.

Step 1: Post your job on MyBuilder

Provide a detailed description of your loft conversion project, including the type of conversion you want, any structural changes, preferred materials, and your ideal timeline. Once posted, local loft conversion companies in Isleworth can view your job and register their interest.

Step 2: Review and compare Isleworth loft conversion companies

Browse the profiles of interested loft conversion companies. On MyBuilder, you can view photos of previous projects alongside customer reviews, compare quotes, and see the types of conversions they specialise in.

Step 3: Contact and discuss your project

Once you’ve reviewed local Isleworth loft conversion companies, you can reach out to those that interest you to ask questions, clarify details, and request more specific quotes. At this stage, be sure to discuss vital aspects like planning permission, design options, and estimated timelines to ensure the company meets your requirements.

Step 4: Hire the right Isleworth loft conversion company

Once you’re satisfied with their experience, quotes, and approach, you can confirm your hire and start planning your loft conversion.

You can also take a look at our loft conversion specialist hiring guide to help inform your choice. All tradespeople undergo checks at registration - such as verifying ID documents, company details, and certifications for regulated jobs and doing skill assessments - allowing you to hire with confidence.

Questions to ask local loft conversion companies in Isleworth

Choosing the right loft conversion company for your job requires finding someone who understands your home and your goals.

Find out which company can share your vision by asking the following questions:

What experience do you have with loft conversions in Isleworth?

A local loft conversion company in Isleworth will know the types of properties and building styles common in your area, as well as the planning and building regulations that apply. Ask about similar projects they’ve completed locally.

Are you insured, and do you offer a warranty for your work?

Insurance protects your home during the loft conversion process, while a warranty shows the company’s confidence in the quality and durability of their work.

How do you handle planning permission and building regulations?

Established loft conversion companies in Isleworth should understand local planning rules and building regulations. Ask how they’ll manage permissions, inspections, and compliance to avoid delays or legal issues.

What is included in your quote?

Ensure the quote covers all essential aspects of the loft conversion: structural work, windows or skylights, staircases, insulation, labour, and any additional fees. Understanding this upfront prevents unexpected costs later.

Do you manage the project from start to finish?

Some Isleworth loft conversion companies offer full project management, coordinating architects, builders, and tradespeople. Others may only handle part of the conversion. Clarifying this early on helps you understand what support to expect.

FAQ: Common questions about loft conversions in Isleworth

How long does a loft conversion take?

Typically, a loft conversion can take between 6 and 12 weeks, depending on complexity, planning permissions, and any structural work required. Be sure to discuss the timeline with any potential loft conversion companies in Isleworth before agreeing to start the work.

Do I need planning permission for a loft conversion in Isleworth?

Many loft conversions fall under permitted development, but some require planning permission, especially if you’re adding a dormer, extending the roof, or living in a listed building. A professional Isleworth loft conversion company can advise and handle permissions for you.

Will a loft conversion affect my home insurance?

Yes, you’ll need to update your home insurance to cover the conversion. Inform your provider about structural changes, additional rooms, and any changes to utilities or heating systems.

Can I stay in my home during the loft conversion?

Many loft conversions allow you to remain in your home, though noise and dust are inevitable. Some Isleworth loft conversion companies offer strategies to minimise disruption, but in complex projects, temporary relocation may be advisable.