The oak garden room replaces an existing glass conservatory. The entrance to the house is reconfigured through the making of a new double-height entrance hall between the garden room and the existing house. This provides access at half-levels to the living areas and to the new playroom and study which are placed below in an existing semi-basement. These rooms are enclosed behind a new folded brick wall, with large horizontal openings onto the garden. The upper floor is a steel-framed box, clad in oak and presenting large opening windows to the south and west. Sliding slatted oak screens provide a protective layer, permitting control of view and ingress of sunlight to the garden room. These screens slide back behind the solid timber panels. The frame supports a cantilevered seat around the room’s perimeter, making the screens habitable. Under the seat, a continuous window at floor level gives views down to the garden and forms a joint on the exterior between the brick and the oak. A similar joint is made between the new roof and the existing by the making of a continuous rooflight that pulls light down to the entrance hall and stairs.