South London builders for extensions, refurbishments and loft conversions
Established & Trusted
High-Quality Work
Fair Pricing
Clear Communication
DORMER & VELUX LOFT CONVERSIONS

Turn unused loft space into a proper room

A loft conversion should feel like it belongs, not like an afterthought. We build dormer and Velux loft conversions across South London, focusing on structure, head height, stairs, insulation and a clean finish. You get clear costs, realistic timelines and a hands-on team from start to finish.

01689 610425
HOW WE WORK

Planned properly, built carefully

Loft conversions need good sequencing. We plan access, structural work and first-fix services so the job runs smoothly, with clear updates and issues dealt with properly as they arise.

Loft conversion work in South London

Loft conversions that add space without sacrificing comfort

We focus on the things that make the room feel right: usable head height, natural light, sensible stair design, and insulation and ventilation done properly.

Whether you are planning a bedroom, office or extra living space, we help you make practical choices early, understand costs, and avoid common issues during the build.

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What you get with a Building Plus loft conversion

Better use of space
Better use of space
A layout that makes the loft feel like a real room, not a squeeze.
Well planned build
Well planned build
Structure, stairs and services planned together from the start.
Comfortable year round
Comfortable year round
Insulation and ventilation handled properly for a usable space.
Clear management
Clear management
One team, clear communication, realistic timelines.

Frequently asked questions

How long does a typical loft conversion take?
Timelines depend on the type of conversion and access. Once we understand the scope and structure, we will give you a realistic programme and keep you updated throughout the build.
Can I live in the house during a loft conversion?
In most cases, yes. Loft conversions are usually carried out from the top down, which helps reduce disruption to the rest of the house.
Do loft conversions need planning permission?
Many loft conversions fall under permitted development, but this depends on the property and design. We can help you understand what applies to your home and guide you through the process if approval is needed.
How do you deal with stairs and head height?
We assess head height, stair positioning and layout early on to make sure the new space feels comfortable and complies with building regulations.
Do you handle structural work and steel installation?
Yes. Structural alterations and steelwork are a key part of most loft conversions and are planned and installed as part of the build.
Will I have one main point of contact?
Yes. You deal directly with the people running the job, so communication stays clear and decisions are dealt with quickly.
Are you fully insured?
Yes. We carry full public liability and employer’s liability insurance, so your home and everyone on site is properly covered.

Start your project with us

Arrange an initial chat to talk through your plans and next steps.