Set in a tiny village in the south of France, this tough little extension mixes well with the surrounding romantically derelict buildings. Housing a studio and guest bedroom, it is clad in zinc and timber and built on the ruins of an existing structure. In a conscious echo of local seams of iron, the architect has used Cor-ten for an elegant slender stair, a bridge, and window sills. More extravagant is the sill to the south-facing window, shaded in summer by an ash tree. In winter, the low sun should bounce off a sill clad in gold leaf, to reflect on the birch plywood soffit of the studio.