'21 Borrett Road' is a property apartment unit in Mid- Levels Hong Kong. With 700 sqm in size occupying 3 levels, we combine 2 side by side units and transform into a penthouse unit offering an openness of space. An internal staircase was added being the vocal point and gave reference to traditional Chinese structures like the Chinese siheyuan and provides benefits like privacy, natural light, and a seamless blend of indoor and outdoor living. Beauties of oriental Chinese flower and nature of wood, tree branch and birds were brought into the living environment in an abstract way.