Celebrating 25 Years of Loft Conversions & Extensions in South London. Call us today on 020 8673 4114.
If you own a Victorian or Edwardian home in South London, a mansard loft conversion is one of the best ways to unlock extra space and transform the way you live. With a steep 70° rear roof and generous head height, mansards create rooms that feel like a natural extension of your home, bright, spacious and incredibly versatile.
At South London Lofts, we’ve spent over 25 years designing and building mansard conversions across Balham, Clapham, Tooting and neighbouring areas. Whether you’re dreaming of a new master suite, a quiet study, or an extra bedroom for a growing family, we’ll guide you every step of the way.
Did you know?
South London Lofts have over 25 years of experience in loft conversions & extensions in South London.
Mansard conversions are a popular choice for homeowners looking for:
Mansard conversions are particularly suited to terraced and period properties, but they can also work for semi-detached and detached homes. They require planning permission, but our team will handle the entire application process for you.
| Feature | Mansard Conversion | Dormer Conversion | Hip-to-Gable | Velux Conversion |
|---|---|---|---|---|
| Space Created | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐ |
| Aesthetic Appeal | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐ |
| Planning Needed | ✅ Yes | ❌ Usually Not | ❌ Usually Not | ❌ No |
| Best For | Period Homes | Most Properties | Semi-Detached | Budget-Friendly |
We’ve completed hundreds of loft conversions across South London, and mansards are one of our most requested styles. Our experience means we know exactly how to maximise your space, navigate planning, and deliver a high-quality finish every time.
We’ll visit your home, discuss your ideas, assess your loft, and show you what’s possible — all with no obligation.
Every mansard conversion we build is covered by a full 10-year workmanship guarantee, giving you peace of mind long after the project is complete.
From architectural drawings and planning permission to construction and finishing touches, we manage everything. No stress. No juggling trades. Just a smooth, well-run project delivered by experts.
A mansard conversion involves altering the entire rear roof slope to a near-vertical angle (around 70°), creating exceptional interior space compared to other loft types.
This style is popular in South London because:
It offers the largest internal space of any loft conversion
It blends beautifully with period properties
It can often add significant resale value
It allows for multiple rooms, en-suites or walk-in wardrobes
Mansard lofts require planning permission, but don’t worry. We handle the entire application for you, including drawings and structural calculations.
A mansard conversion is ideal if you want:
A full-height bedroom, office, guest room or master suite
Maximum usable floor space
A design that complements older homes
The ability to add multiple rooms
More natural light with dormer-style windows
We’ll confirm suitability during your free consultation, including structural considerations, party wall requirements and planning pathways.
My neighbour did his loft conversion last year and I was really impressed with the quality of work carried out by South London Lofts. At the outset, we discussed the issue of the party wall agreement, and agreed to avoid the need for party wall surveyors and the extra cost this incurs. I felt that I trusted the work of this company, which was why I chose them to do my loft too. How chuffed I was by the results. I suppose one of the highlights of South London Lofts’ service was their use of builders who were polite, efficient and skilled; I can honestly state that I could find no fault throughout the 10 week build time: rare for a project such as this. Their price was more than reasonable, too. And so I have used South London Lofts on another project – I am perhaps the ultimate satisfied customer!
A quick note to say that we were extremely impressed with your guys who have basically revamped the entire house in 8 weeks. Anthony and Ramas were very pleasant to work with and the finish is very good- we are very happy.
All certification delivered as agreed and the project delivered on time (if not ahead of time). We would not hesitate to recommend the team to other people. Thank you. Anthony Ambrose RIBA
We are absolutely delighted with our kitchen extension. South London Lofts actually extended into the dead space that was the side return and knocked down a chimney breast to create a light modern very spacious kitchen. SLL did a fantastic job for us. Our project manager Virgis, kept everything on track and kept us fully consulted and informed all the way through. The whole team, brickies, electricians, plumbers, roofers worked extremely hard. The quality of workmanship is excellent. The kitchen is now the focal point of family life in our home. We had chosen SLL since they had done a wonderful job building our loft rooms in 2008. We made the right choice.
Get a Free Consultation
Ready to transform your home with a mansard loft conversion? Contact South London Lofts today for a free consultation and no-obligation quote. Our team is here to bring your vision to life with a seamless and stress-free process.
Call us now or fill out our online enquiry form to get started!
Call us on 020 8673 4114, email info@southlondonlofts.co.uk or complete the form below.
We look forward to hearing from you.
