Mansard loft conversions

The Mansard loft conversion was named after the 17th-century French architect François Mansart (1598-1666), who used this design of roof on many Baroque buildings to add an element of classicism into his works. They are a common sight in older properties – especially in London – but are rarely seen in the suburbs.

A Mansard loft conversion typically has two slopes: the lower slope is close to vertical (72 degrees), and the top section is almost horizontal. This type of loft conversion, which is constructed by raising the party wall shared with your neighbour’s property, will significantly increase the size and usable space within your loft conversion because it will extend across the entire plane of your roof.

Mansard loft conversions are commonly constructed by raising the party/gable walls either side of your house to make the profile for the mansard, and then creating the timber frame. The external walls of the extension can be constructed of exposed brickwork or rendered with slate or tile, depending on the look you want to achieve for your property.

Because this type of conversion will normally involve replacing the whole roof, construction costs for the project will be higher than simpler dormer or hip to gable extensions. However, the extra expenditure is almost always worth it if you’re keen to add significant space and value to your house, chalet or bungalow in Essex or London.

A mansard loft conversion will almost certainly require planning permission from the local authorities. You can find out more about the potential planning requirements by visiting the government’s Planning Portal using the link below. Alternatively, feel free to contact the team at Landers Lofts and we will answer all your queries regarding mansard loft conversions.

If you’re unsure which type of structure is most suited to your home, you may find it useful to compare the different types of loft conversions..