The most significant factor affecting the built environment in the East Africa region is solar energy, which impacts on it throughout the year. The shapes of buildings and spaces have a great effect on indoor temperatures. When designing a new building, it is very important to pay attention to the needs of its users and to consider the environment they are likely to spend most of their time in. The building should be user friendly and comfortable. Factors to consider for adequate indoor comfort are daylight, room temperature and air quality