# Types of Loft Conversion: Velux, Dormer and Hip-to-Gable Compared

Canonical URL: https://mirion.uk/blog/loft-conversion-types-compared/

> The three main types of loft conversion explained — what each one involves, how much space you gain and which is right for your home in London.

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The three main types of loft conversion explained — what each one involves, how much space you gain and which is right for your home in London.

*AI-generated illustration; not a completed Mirion project.* A loft bedroom with a rooflight set into a sloping pale ceiling.

## Which loft conversion is right for your home?

The right loft conversion depends on your roof structure, how much head height you need and what you want from the space.

## Velux \(roof light\) loft conversion

**What it is:** Roof windows installed flush with the existing roofline. No structural changes to the roof shape.

**Best for:** Homes with enough existing head height \(usually 2.2m or more at the ridge\).

**Cost:** £25,000 to £40,000 typically.

## Dormer loft conversion

**What it is:** A box-shaped extension built out from the roof slope, creating a flat ceiling and vertical walls inside.

**Best for:** Homes that need more head height and usable floor area. The most popular type in London.

**Cost:** £35,000 to £55,000 typically.

## Hip-to-gable loft conversion

**What it is:** The sloped end of the roof is replaced with a vertical wall, creating more internal space.

**Best for:** Semi-detached or end-of-terrace houses with a hipped roof.

**Cost:** £40,000 to £65,000 typically.

## Which should you choose?

We survey your loft and tell you honestly which type works best — and what it would cost. There is no obligation and no pressure.