Three pieces of work for one house on Hemingford Road in Islington, a four-storey house with brick load-bearing walls, timber floors and a pitched timber roof, designed with SOAK: a sauna at the end of the garden, a stone balcony at the back of the house and a dormer in the roof.

Sauna (built). A small room set partly into the ground. A reinforced concrete base with 250 and 150 mm retaining walls holds back the garden; above ground the walls are 100 mm stone bricks, 440 × 215 × 100. On top sits a Douglas fir frame: 50 × 200 posts and wall plates, 100 × 200 beams and 44 × 145 rafters at 400 centres under a clear mono-pitch roof. The timber is joined with Rothoblaas structural screws and connectors, and the frame, screen and shutters are left exposed.

Stone balcony (tender). The balcony replaces the old external stair and opens off the stair landing between the first and second floors. It is carried by two cantilevering beams, each cut from a single piece of Portland limestone (Jordans Whitbed) and post-tensioned with a stainless steel threaded bar, so that the whole section stays in compression in service. Flexural and compressive stresses are kept within the stone's lowest expected value with a factor of safety of 2.5. The beams carry an external stone slab and, on the backspan inside, the timber joists of the landing. The backspan is held down by a timber beam built into the brick wall on one side and into a strengthened stud wall on the other.

Dormer (tender). The rear roof pitch is raised to make a new room at the top of the house. A flat timber roof spans between the brick party wall and an existing internal partition, and the new rear façade is a non-load-bearing timber frame. Neither the balcony nor the dormer changes the loads on the existing foundations by more than 5 %.