Loft Conversions in South East London and Kent
Dormer, hip to gable and Velux conversions, design to sign off
Buildaway plans and builds loft conversions across South East London and Kent, including dormer, hip to gable, mansard and Velux conversions. We take the job from the first drawings through structural work, insulation, stairs, plumbing and electrics to a finished, signed off room. Every conversion comes with a free site visit, a fixed written quote and an 18 month workmanship warranty, and we are registered with the Federation of Master Builders.
We handle the planning and building control side for you, so you are not left dealing with the paperwork. One team stays on the job from start to finish, and we agree the timeline and price with you before any work begins.
Registered with the Federation of Master Builders, and every job we do is covered by our 18 month workmanship warranty.
What's Included
We handle all construction and finishing works, and if you don't have drawings yet, we can help with that too:
Dormer, L-shaped, hip-to-gable and Velux conversions
Professional loft conversion design and construction.
Structural works and steel installation
All reinforcements and load-bearing elements installed to regulation, ensuring long-term strength and compliance.
New staircase installation and floor construction
Safe, stylish staircases built to code, with solid floors that line up neatly with the rest of your home.
Insulation, ventilation and roofing upgrades
Energy efficiency and climate control built in, for comfort all year round.
Electrical work, plumbing and heating
All new electrics, radiators, lighting and en-suite plumbing fully managed and installed.
Rooflights, skylights and windows
Brighten the space with high-quality glazing and natural light solutions.
Plastering, painting, flooring and finishing
Your new loft handed over clean, complete and ready to furnish.
We're happy to work with your architect or designer, or help you explore layout and style options directly with us.
Why Choose Buildaway for Your Loft Conversion?
One quote, one team, one clear process
No managing multiple trades or chasing timelines, we take care of the full project.
Skilled trades you can rely on
Our team is polite, professional, and focused on delivering top-class results, not rushing through jobs.
Dedicated project manager throughout
We keep you fully informed from day one and handle everything behind the scenes.
Clear warranty on all labour
Your loft is backed by our workmanship guarantee, and we only use materials from trusted suppliers.
Areas We Cover
We build loft conversions right across South East London and Kent. Below are some of the areas we work in most often. Choose your area for local details and recent work.
We work in many more areas across London and Kent. Visit our areas we cover page to check that we work at your postcode.
Get Your Free Quote
Tell us about your project and we will come back with a fixed written quote after a free site visit.
Common Questions
How much does a loft conversion cost in London?
A loft conversion in London typically costs between £35,000 and £55,000 for a rear dormer, and £55,000 to £80,000 or more for an L-shaped dormer or hip-to-gable conversion. A simple Velux or rooflight conversion without altering the roof structure usually starts from around £20,000 to £30,000. The final price depends on the type of conversion, the size of the new space, whether you need steel beams, the staircase design, and the level of finish you choose, for example, adding an en-suite bathroom, underfloor heating or bespoke joinery will increase the cost. We survey the loft free of charge, check headroom, assess the roof structure and discuss your plans. You then receive a fixed, itemised quote covering everything from structural steels and building regulations sign-off to plastering, electrics, plumbing and decoration, with no hidden charges.
Do I need planning permission for a loft conversion?
Many loft conversions fall under permitted development and do not need full planning permission, but it depends on your property and the type of conversion. We check this for you at the site visit and handle any application and building control that is needed.
How long does a loft conversion take?
Most loft conversions take between six and twelve weeks from scaffold going up to final sign-off. A Velux conversion with minimal structural work can be completed in around six to seven weeks. A rear dormer typically takes eight to ten weeks, while an L-shaped dormer or hip-to-gable conversion usually requires ten to twelve weeks. The programme starts with scaffolding and structural steels, followed by roof alterations, floor construction and staircase installation. After the shell is complete, we move on to first-fix electrics and plumbing, insulation, plasterboarding, second-fix wiring, bathroom fitting if applicable, and finally decoration. We provide a detailed week-by-week schedule before starting and keep you updated at every stage. Most of the noisy structural work is finished within the first two to three weeks, and you can stay in the house throughout the build.
Can I stay in the house during the work?
Yes, in most cases you can. A lot of the early work happens up in the loft and outside, so day to day life carries on. We keep the rest of the house protected and tidy while we work.
Are you insured and is the work guaranteed?
Yes. We are registered with the Federation of Master Builders, we carry full public liability insurance and every loft conversion is covered by an 18 month workmanship warranty.
Guides Worth Reading
Practical advice from our team on planning and costing your project.
Let's Build Your Ideal Loft Space
Click below to request a home quote and bring your vision to life.