The requirement was for a large kitchen to be built on to a three-storey Victorian semi-detached house in Berkhamsted. The roof had to be kept as low as possible to avoid obscuring a first-floor window and to prevent excessive overshadowing of the adjoining property. The solution is a simple lead-clad roof, sloping back from a high point along the south-east-facing garden elevation to a valley gutter against a rebuilt lean-to, the roof of which has been raised. Internally, a gently curved ceiling follows the roof profile and this curve is carried through to an externally projecting bargeboard. Other external materials are terracotta-painted render to match the existing house, combined with blue boarding to the garden frontage. The construction cost was around £25,000, the contractor was E W Rayment.