House N° 11- entrance to the original house. Sitting comfortably side by side, the old part of the house and new part of the house visually regard each other across an open central courtyard. The two structures are knit together by a central staircase comprising of thin steel bridges stretching from one level to the next, criss-crossing the courtyard space. As such, occupants pass through the old and new parts of the house in alternate fashion as one traverses this staircase.
On a narrow, kinked plot, the Grass Cave house is a series of grassy platforms, which contain the small house. From the street, a large platform looms overhead, covering the entrance and car park. Inside, frosted glass lets in light, while maintaining privacy. A central core houses a pantry and bathroom on the first and ground floor, and serves as a light well and a ventilation stack. http://www.frameweb.com/news/grass-cave-house-by-makiko-tsukada-architects