Models in architecture and town planning emerge in history as reflections of economic, social and cultural changes. Ideally these models are tailored to suit societal needs. In practice we find a mixture of models, some of which are not well adapted to the social and cultural context. Many are unsustainable in all respects of the word (Oliver 1990; Vestbro 2001). The question is which design models are suitable to which economic, social and cultural context. Every region is characterised by its architectural heritage. It reflects the culture of the people and the way they protect themselves from hostile environments (Denyer 1978, Oliver 1997). The onslaught of, first colonialism, then globalisation, has produced contempt for local cultural heritages, however. In most parts of the world we see buildings that are not responsive to local climatic conditions and whose spatial arrangements do not respond to social needs. In the case of Uganda the most common material of house construction is burnt brick. It is estimated that 40,000 tons of wood are destroyed annually for the burning of bricks. This is likely to lead to an environmental hazard for this poor country. Therefore it is necessary to find solutions for less energy-demanding house types (Nawangwe et al 2001).