Reconsidering Daylighting Design Parameters for Tall Buildings in a Densely Built City

Hong Kong presents a unique case of high-density living, featuring a compact urban form utilizing an extremely small percentage (21%) of total land area. Physically, the city is a mixing pot of commercial, office and residential buildings built along narrow streets, governed by a laissez-faire property market mechanism that reflects a mixed and intensive land-use pattern. The resultant urban form creates an unprecedented challenge for environmental amenities and in particular for daylight for skyscrapers. The paper discusses problems and underlying causes of daylight performance for kitchens under high-rise building scenarios. The kitchen is the subject of concern because it is claimed to be the worst lit space in prevailing high-rise building design. Besides focusing on socio-cultural expectations, the physical design of kitchens was examined critically, including the positioning, size and area of windows, reflectance and internal obstructions such as shelves and utility items, room area and room configuration. The concluding remarks make specific reference to socio-cultural factors concerning the usage of kitchens. It is the intention of this paper to use the kitchen as a proxy to illustrate the inherent problems and difficulties in directing daylight for different habitable spaces (bedrooms, living and dining rooms, as well as kitchens) in densely built, high-rise urban environments