Loft Conversions & Extension Specialists

Celebrating 25 years of loft conversions & extensions in South London

What Type of Loft Conversion?

Congratulations, you’ve decided on a loft conversion…. But what type of loft conversion?!

As there are several ways of going approaching your project, the one you select will depend on not just your property, but also your tastes, and the local requirements regulations.

Here’s our quick and easy guide to the basic types of loft conversion. Please also check out our projects page which we update regularly.

Velux roof conversionVelux conversions

This is the simplest and usually the most inexpensive type of loft conversion. Velux roof windows conversions add some roof windows to the front and the rear of the existing roof slopes, leaving the external roof shape with no extensions. It will require a new staircase, which is manufactured by specialised joiners, in off-site workshops. Most of the Velux conversion projects tend to have a least one bedroom and a shower room. There is seldom any need to apply for planning permission unless your property is in a conservation area which certainly adds to the appeal!

Dormer roof conversionDormers

Dormer loft conversions are by far the most common type of loft conversion. They’re normally built without the need for planning permission via permitted development on house. However, on flats and maisonettes planning permission would be required.
Dormer loft conversions create very little change to the look of the property at the front but a magnificent outlook to the rear. Our favourite designs feature elements including French window and a Juliette balcony

If your property has a rear addition, like so many London Victorian and Edwardian houses, an L-shaped dormer conversion can have enough space for two new rooms and a shower room. 

Mansard roof conversionMansards

These kinds of loft conversions are typically associated with London town houses with “butterfly” type roofs, but more often extended at the rear of mid terrace victorian properties

The rear roof slopes at 70 degrees and smaller dormer windows are inset so there is very little compromise to the quality of the space inside.

In terraced houses, common across London’s Georgian, Victorian, and Edwardian streets, mansard conversions maximise roof space without expanding the building’s footprint. They create substantial additional living areas, often accommodating new bedrooms, bathrooms, or home offices, while maintaining the roofline’s harmony from the street.

For semi-detached houses, mansard loft conversions provide similar space benefits while preserving the architectural symmetry between adjoining properties. This ensures a seamless and balanced look that enhances both functionality and aesthetics.

You also have the option of going for the L shape mansard, if you have a rear addition to your property, adding a further extension over this section.

Hip to Gable roof conversionHip to Gable

This is the solution if your roof has a sloping hip-end instead of a gable end – the type of house that was more commonly build after the Edwardian period.

This type of loft conversion transforms a sloped, or “hipped,” roof into a vertical gable wall, significantly increasing internal space. Ideal for semi-detached or end-of-terrace homes with limited loft capacity, this conversion design integrates seamlessly with the existing property.

By extending the roofline, a hip to gable conversion utilises previously unused areas, maximising floor space and ceiling height. This makes it a popular choice for homeowners needing to enhance functionality without compromising on exterior appearance. Often combined with rear dormer extensions, it delivers even greater flexibility and design potential.