A loft conversion is one of the most popular ways to add space and value to a London home. With property prices high and garden space limited, converting your loft can add up to 20% to your property value.
Types of Loft Conversion
1. Velux (Rooflight) Loft Conversion
The simplest and most affordable option. Velux windows are added to the existing roof slope. Usually falls within Permitted Development.
Typical cost: £20,000–£35,000
2. Dormer Loft Conversion
A box-shaped structure extending vertically from the roof slope. Creates maximum headroom and floor space. Most popular type in London.
Typical cost: £35,000–£60,000
3. Hip-to-Gable Loft Conversion
Ideal for semi-detached and detached houses with a hipped roof. Extends the hip end to create a vertical gable wall.
Typical cost: £40,000–£65,000
4. Mansard Loft Conversion
The most extensive type: it involves raising the party wall and replacing the existing roof structure. Provides the maximum space.
Typical cost: £50,000–£70,000+
Do You Need Planning Permission?
Many loft conversions fall within Permitted Development rights. However, you will need planning permission if your home is in a Conservation Area or if the additional volume exceeds permitted limits.
Why Choose Unsel Consultancy for Your Loft Conversion?
From initial feasibility through to planning submission and Building Regulations sign-off, Unsel Consultancy Ltd manages every step of your loft conversion project.
See how we support planning and approval drawings or contact us to discuss your loft conversion.