An original three-bed semi, built in the late 1930’s, is located on an unusual wedge-shaped site affording plenty of space to the side and a large south-facing garden to the rear. It was possible to almost double the size of the house on the site, without unduly affecting its appearance from the street. A stepping arrangement of volumes, starting from the line of the original projecting garage, subsumes the original semi-d into a more terrace-like composition, while retaining the original material treatment. The terracing effect is completed by not allowing the roof to project past the parapet – this achieves a quiet, recessive appearance, not an object dominated by a roof form.