Velux Loft Skylight Window
Interested in Skylight Loft Conversions? Contact Us Today
LOOKING FOR LOFT SKYLIGHTS?
Skylight loft conversions are also known as Velux conversions. These are perhaps the most cost-effective loft conversion out there, as it requires the simplest amount of construction.
For those lucky enough to already have enough space in their loft, Skylight loft conversions can provide a truly cost-effective way to build an extra room, and generally speaking (this isn’t the case for all) planning permission isn’t usually needed.
It’s worth noting however, that due to the loft conversion merely consisting of making use of the space that you already have, without extending, these types of loft conversions can be more restricting. Nevertheless, they are far more affordable and usually take a mere matter of weeks to complete, which can be a huge bonus for some.

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WHY CHOOSE LOFT SKYLIGHTS?
With the outside of your property not being altered, aside from a Velux style window, you can expect minimal construction.
Despite this, they still offer incredible benefits such as beautiful views, extra space that can often work out great as an office or playroom and they still add incredible value to your home.
Here at Clapham Construction Service, we’ve carried out multiple Skylight Loft Conversions throughout London and beyond. As loft conversion specialists, we can help you decide whether a skylight loft conversion would be the best choice for you. For more information, please don’t hesitate to contact us on 0203 950 7957.
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Testimonials
Posted on Andy Brown19/02/2026Trustindex verifies that the original source of the review is Google. From the initial meeting to the final finishing touch, Paul, Dangis and their team were great! We knew exactly what to expect each week, we had lots of photos and drone videos of work happening when we couldn’t see. They were full of advice and suggestions when we couldn’t visualise the end result. They left our home as clean and as tidy as they possibly could (we were living in the house as they were working around us). We are really pleased with the end result and with the building experience! Great time, fantastic work ethic and brilliant result!Posted on Rebecca Barrett15/12/2025Trustindex verifies that the original source of the review is Google. We can’t thank Paul, Dangis, and the team, enough for their hard work on our house. The house is everything we had imagined and more. We increased our scope multiple times throughout the process, and the team helped us seamlessly, and were always there to answer questions and support our plans. We only have good things to say about Clapham Construction, and will definitely be recommending them to all our friends and family. Thanks again!Posted on Helen Stevens03/09/2025Trustindex verifies that the original source of the review is Google. I cannot speak highly enough of Clapham Construction. Paul and Dangis were a dream to work with from start to finish. Everything was communicated so well and they provided honest, transparent and clear advice throughout; I felt supported and guided through all the decisions and they helped me make more bespoke decisions such as our windows and floor which weren’t necessarily easy! Everyone who came to work on the loft was excellent and it has all been completed to a high standard. The loft is beautiful and we just can’t believe how much space we have and how well done everything is. I would (and have!) recommend to anyone! Thank you Paul and Dangis - and we will be coming straight back to you for the next project!Posted on Georgia Beales01/08/2025Trustindex 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!Posted on Danilo Rico07/07/2025Trustindex 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.Posted on Joel Prime02/07/2025Trustindex 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.Posted on Jane Ansell08/05/2025Trustindex 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!Posted on Jamie Garratt24/01/2025Trustindex 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.Posted on Christina Ansong16/10/2024Trustindex 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!Posted on Ayan Sengupta31/08/2024Trustindex 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.Google rating score: 5.0 of 5, based on 83 reviews
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SKYLIGHT LOFT CONVERSION - FAQS
What is a skylight (or Velux) loft conversion?
A skylight, or Velux, loft conversion involves adding windows into the existing slope of the roof without altering or expanding the existing space in any way. This type of conversion is named after the popular window manufacturer, Velux.
How much does a skylight (or Velux) loft conversion cost?
Skylight loft conversions are typically the most cost-effective type of loft conversion, as they require less structural work than other types. The cost can vary depending on the number and type of windows you choose, but typically you might expect to pay between £25,000 and up.
Do I need planning permission for a skylight (or Velux) loft conversion?
In most cases, skylight loft conversions fall under permitted development rights and do not require planning permission, as they do not significantly alter the profile of the roof. However, it’s always best to check with your local planning authority to be sure.
What types of windows can be used in a skylight (or Velux) loft conversion?
There are several types of windows that can be used in a skylight loft conversion. The most common are centre pivot windows, which rotate in the middle, and top-hung windows, which open from the top. There are also roof terrace windows, which can provide access to a roof terrace, and balcony system windows, which create a small balcony area. The best type of window for your conversion will depend on your specific needs and the structure of your roof.
How long does it take to complete a skylight (or Velux) loft conversion?
As skylight loft conversions require less structural work than other types of conversions, they can often be completed more quickly. The exact timeline will depend on the complexity of the project, but typically you might expect a skylight loft conversion to take around 4 weeks to complete.

