Loft Conversions London
- Specialist Loft Conversion Builders in London
- 20+ Years of Experience
- Bespoke Loft Conversion Designs
- 10 Year Guarantee
- Fully Compliant with the Latest Building Regulations
- £5 Million in Insurance Cover
Find our more about Loft Conversions. Call Us Today
BEST LOFT CONVERSION COMPANY LONDON
Clapham Construction: Specialists in bespoke Loft Conversions in London. We focus on custom-designed lofts tailored to your style, offering affordable and efficient loft transformations. Each loft conversion is specifically made to meet your needs, ensuring a smooth journey towards your ideal London loft with great satisfaction.
WHAT IS A LOFT CONVERSION?
A loft conversion is the process of transforming an unused loft space into a functional room. While these spaces are often converted into bedrooms, the possibilities for their use are endless. Loft rooms can serve as:
- Music Room
- Ensuite Bathroom
- Kitchen
- Walk-in Wardrobe
- Art Studio
- Much more…
Loft conversions are one of the most effective ways to add significant value to your property, offering an impressive return on investment when compared to other types of home improvements. In the bustling city of London, where space is at a premium, loft conversions have become a popular solution for homeowners seeking to maximise their living space.


WHY HAVE YOUR LOFT CONVERTED?
Home improvements come in many forms, but one of the most transformative and beneficial changes a homeowner can opt for is a loft conversion.
- Maximised Space: Transform unused areas into functional spaces.
- Increased Property Value: Boost the market value of your home.
- Cost-effective Expansion: Often cheaper than moving or traditional home extensions.
- Energy Efficiency: Modern conversions can improve insulation, reducing energy bills.
- Personalised Aesthetics: Customise the space to your unique taste and needs.
Considering a loft conversion not only provides homeowners with additional functional space but also offers a cost-effective way to enhance property value and improve energy efficiency.
Transform Your Space with a Loft Conversion. Get in Touch Now!
Recent Loft Conversion Projects
View a selection of our loft conversion projects in London below

Tybenham Road
Rear Dormer
Merton | London

Talma Road
L Shaped Rear Dormer
Brixton | London

Tremadoc Road
Mansard Conversion
Putney | London

Newstead Road
Rear Dormer
Catford | London

Glenister Road
Rear Dormer
Streatham | London

Rudloe Road
L Shaped Rear Dormer
Balham | London

Tremadoc Road
Mansard Conversion
Merton | London

Tybenham Road Rear Dormer
Merton | London
View Our Design and Build Process
Check out the work of our amazing teams and
what we can achieve in your home
Have your say…
Testimonials
Georgia Beales2025-08-01Trustindex verifies that the original source of the review is Google. We’ve had our dormer loft conversion for coming up to three years now and haven’t had any major issues in this time. Any minor snagging issues have been dealt with quickly by Clapham. The whole process from start to finish was seamless. All the builders were very friendly and considerate too. Will continue to recommend this company to anyone who needs a loft done and will not hesitate to use again in the future. Thank you! Danilo Rico2025-07-07Trustindex verifies that the original source of the review is Google. Clapham construction service was extremely professional, the project was finished before the plan and we are so happy with our new space. Problems were resolved quickly and efficiently throughout the process. This was one of our best investment that not only added value to our property but also a significant improve of our quality of life. Joel Prime2025-07-02Trustindex verifies that the original source of the review is Google. I had a loft conversion completed by Clapham Construction Service earlier this year and couldn't be happier with the results. Paul and Dangis were on site every day and kept me fully informed throughout the entire process. Their communication, professionalism, and attention to detail were outstanding. I felt completely confident in their work from start to finish. Highly recommended for anyone looking for reliable and high-quality building services. Jane Ansell2025-05-08Trustindex verifies that the original source of the review is Google. We recently completed a double mansard loft conversion with Clapham Construction Service, and were very happy with the whole design and build process from start to finish. Paul and Dangis were great to work with, providing clear communication and always being available to answer questions or discuss options. Their team are also excellent, with all the trades doing a great job, very professional and respectful of the rest of our house. Inevitably with a build project there were a couple of issues that cropped up along the way, but CCS were excellent at helping resolve them. We are delighted with the final loft and the extra space, and have already recommended them to others! Jamie Garratt2025-01-24Trustindex verifies that the original source of the review is Google. We have just completed a loft conversion with Clapham Construction and it was great! We are so pleased with the new loft we have in our house, but the process of working with CC was really good. They were easy to engage with from the outset, the price was competitive and the actual construction was quick and efficient. Obviously it was a major building project with all the mess and decisions you’d expect, but it was made a lot easier and less stressful working with Paul, Dangis and the team. They completed the project on time and on budget and we enjoyed working with them - that is more than almost anyone we know can say about similar projects! We’d definitely recommend them. Christina Ansong2024-10-16Trustindex verifies that the original source of the review is Google. We had an exceptional experience with Clapham Construction for our loft conversion. Paul, Dangis, and the whole team were fantastic from start to finish. They transformed our attic into two beautiful loft rooms and a bathroom, exceeding our expectations with their attention to detail. The entire project was completed at an impressive speed without compromising quality. The team showed great care throughout, ensuring everything was done to the highest standard. Their service was professional, friendly, and stress-free. We’re absolutely thrilled with the results and would highly recommend Clapham Construction! Ayan Sengupta2024-08-31Trustindex verifies that the original source of the review is Google. We have recently used Clapham Construction Services for loft conversion to add a bedroom and a bath in the house. We are very happy with the end-to-end experience with Paul, Dangis and the entire CCS team for high quality work done in quick time and with a very collaborative approach. Our overall project went into some unexpected blockers, but Paul and Dangis patiently helped us to resolve all the matters, kept us updated with timely communication and have been very flexible to guide us. They brought in a fantastic team to complete the work fast and in a cost-efficient manner. We will recommend CCS any day as a trusted team for home transformation projects. Dani Carter2024-07-02Trustindex verifies that the original source of the review is Google. 2024 Review - Part 2 Building a whole new kitchen and taking down every wall is not for the faint hearted. We took a number of years to decide and raise the funds. At tender stage, Clapham Construction, the top team who built our loft 2 years previously (see the other review below), suggested they might have space to take on the project. It was a key decision. From the off they worked tirelessly to keep the build on time and worked hard with us to keep it on budget. Paul or Dangis were on site daily managing the teams and fielding our endless questions. There were obviously bumps, stresses and challenges, it was a rollercoaster; but the high level of communication and attention to detail was exceptional. And all done with great humour and calm disposition. Not only did they take the time to manage the teams and us, they also helped with every niggle on the way - from architects, to delays with the door supplier we had sourced independently. We are now in the extremely fortunate position of having a space we could only have dreamed about. This would not have been possible without Paul and Dangis and the Clapham Construction team. In addition, they are just lovely people who are a joy to have in our home. Not the most essential thing you might think when hiring a build team, but actually crucial in the day to day grind of chaos and dust. We are hugely, eternally grateful and I just cannot recommend them enough. 2022 Review - Part 1 Absolute professionals is the first thing you need to know about Clapham Construction service. And there are two further things: they are brilliant at what they do and they are generous in spirit. Throughout our project Paul and Dangis answered our naive questions with warmth and care. They helped guide us at every turn, and almost certainly saved us money by making sure we considered all the options we had before making key decisions. But not just customer care, the building work is also top notch. The build itself was a well oiled process, coordinated with skill. I was initially worried about getting an anonymous loft company I'd never heard of in (after getting 8 different quotes from a variety of places including famous local ones) and being part of the 'box on the roof' brigade. Yet somehow, they have created build magic with some tweaks on 'a little bit of height' here, and 'a little configuration' there. We keep marvelling at the sturdiness and smoothness of the physical build even now, and the army of highly skilled teams they have were a pleasure to host in the house while we worked from home. And finally the most important bit - the money stuff- our Loft extension (including bathroom) was completed on time and more or less on budget. The additional costs were the unforseen (yikes victorian chimney ) and a few flourishes that we ourselves added to the mix (make everything gold). Any additional build costs were communicated efficiently and immediately. Our experience of Clapham Construction is that they are patient, hugely knowledgable, and detail orientated with a wealth of incredible advice. Book them now if they have a slot! Davina combes2024-06-19Trustindex verifies that the original source of the review is Google. I recently finished a loft conversion (2BR plus a bathroom) with CCS and couldn’t be happier with the new space. The process could not have gone smoother thanks to Paul, Dangis and their fantastic teams professionalism and attention to detail. They stayed on the timeline that was agreed despite terrible weather conditions which they worked around without any issues reassuming me every step of the way. I have a few more projects around the house and will definitely be looking forward to working with them again. Thanks Paul, Dangis and the CCS team. Freddie R2024-03-26Trustindex verifies that the original source of the review is Google. Paul and Dangis come highly recommended, they completed the conversion of our loft into an L-shaped mansard providing an additional 2 bedrooms and en-suite. From initial engagement, Paul and Dangis couldn’t have been more helpful, providing us with the necessary information and quotation in order for us to make the decision to undertake the works to the property. We have now lived in the finish product for over 6 months and feel that if we needed CCS assistance then they are still at the end of the phone. In summary, we are thrilled with the product, and the process was made simple - 10/10!
TYPES OF LOFT CONVERSIONS
Explore the multitude of loft conversions, each designed to optimise and enhance your property. Whether you’re in need of extra space, planning for a home expansion, or simply wanting to utilise unused areas, our dedicated team is committed to bringing your vision to fruition. We provide complimentary consultations and estimates, so don’t hesitate to connect with us today. Your journey to a transformed loft space is just a call away!
There are several types of loft conversions, each offering unique benefits and being suited to different types of properties:
CAN I HAVE A LOFT CONVERSION?
You might think “can any house have a loft conversion?”. However a loft conversion in your dwelling might be possible, depending on several factors, including the structural integrity of the existing building, adherence to local building codes, and potential need for planning permission.
The ownership of the property and any agreements with neighbors or shared walls (party wall) may also play a role. Consulting with a local architect or builder who is familiar with the rules and regulations in your area will help determine the feasibility of this project. Other considerations, such as budget and design preferences, will also influence the decision.
To help you understand types of loft conversion we have laid them out for you here to gain a better understanding. During the free home consultation we will help you choose the right one for you and your home.


Skylight Conversion
Also known as rooflight conversions, Velux conversions install windows into the existing roof slope without altering

Skylight Conversion
Also known as rooflight conversions, Velux conversions install windows into the existing roof slope without altering

Skylight Conversion
Also known as rooflight conversions, Velux conversions install windows into the existing roof slope without altering

Skylight Conversion
Also known as rooflight conversions, Velux conversions install windows into the existing roof slope without altering

Skylight Conversion
Also known as rooflight conversions, Velux conversions install windows into the existing roof slope without altering

Skylight Conversion
Also known as rooflight conversions, Velux conversions install windows into the existing roof slope without altering

Skylight Conversion
Also known as rooflight conversions, Velux conversions install windows into the existing roof slope without altering

Skylight Conversion
Also known as rooflight conversions, Velux conversions install windows into the existing roof slope without altering
Increase Your Home’s Value. Enquire About Loft Rooms Today!
WHY CHOOSE US FOR YOUR LOFT CONVERSION?
Over the years we have carried out hundreds of home renovation projects, especially loft conversions in London.
We are proud of every project we work on to turn disused spaces into beautiful rooms for our clients and families.
In London loft conversions are popular, where space is at a premium and still a family city, more space is often required.
Perhaps you want that spare bedroom for guests, a home office or want to develop your property for sale or rent.
Whatever you’re looking to do with your attic conversion in London, Clapham Construction Service has already done it for someone else and we can do it for you too.
Remember these are fully completed and decorated, to give you an idea of space, quality, and possible finish, but every house is unique and so is every building service we provide.
LOFT CONVERSIONS: OUR PERKS
Loft Conversion Complete Process
We manage the design and build for you, planning permission, structural design, building control and your project manager will be on your site almost daily to oversee the works and keep you updated.
Quality Craftsmanship
Our works are warrantied, but they will stand much monger than that. We are builders primarily and our teams are experts with quality on our mind – you will get weekly inspections by the owner to ensure we deliver.
10 – Year Warranty On All Loft Conversions
Exactly what it says. We provide you with a warranty to cover you and your home for any defect from our works so you don’t have to worry. In addition you get an independent certificate by the regulators confirming that our works meet the approved building standards.
Attic Conversions Add Value
Getting A loft or attic conversion with us can add up to 25% to the value of your home, making it one the best investments you can make.
Increase Your Home’s Value. Enquire About Loft Rooms Today!
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