Architecture, Building and Structure Design House 4x4x4 Architecture Design by Ching-Huang Ju The owner of the house, who conducted business abroad for years, is now retired and has returned to his hometown. Designers convert an old house in an old community into a 3-story building that is highly functional, energy-efficient, and full of sunlight and fun. The entire space is divided into 4 connected sections based on their functions. Its accurate structure and layout enables a family of four to share such public areas as the courtyard, the living room, the dining room and the kitchen.