We broke the building into two volumes, articulating the garden room, storage and sauna as distinct parts. In the garden room, large glazed sliding doors draw the garden inside, and a single wrap-over rooflight frames the woodland to the rear. The roof follows the sloping ground, and kebony cladding continues the timber language of the main house, itself a recent addition to a 19th-century villa. Securing planning in the conservation area meant detailed coordination with ecology and tree specialists. The two structures add around 40 square metres that the clients now use year-round.