Mansard Loft Conversion
Mansards are in most cases more aesthetically pleasing.
They require increasing the height of the partwall at the roof line and planning consent. The internal ceiling height on mansards is slightly less than dormers, this is due to the slope of the mansard.
A mansard is constructed by raising the party walls either side of your property in brick and then creating a timber frame between the two new walls. The rear face of the mansard should slope backwards at 72degrees to comply with planning requirements. Mansard style conversions offer many of the same advantages as dormers, although are regarded by some to be more aesthetically pleasing, especially on older properties. Mansards will almost always require planning consent and full head-height floor space will be slightly less than in an equivalent sized dormer due to the slope of the mansard face.