Transitional and Disused spaces Transition spaces-These are spaces which are located in-between the outdoor and the indoor environments thereby acting as the buffer space and physical links. Apart from being the functional as the circulatory routes for the buildings, the designing of these spaces is very important by the building designers for the reasons of aesthetics, health and the comfort. They also act as the emergency exit routes in the event of fire. Importance of the optimum energy consumptions in the Transitional spaces is important especially in the non-domestic buildings, since these spaces do not generate income, any type of wastage that is associated with higher energy cost is difficult to justify economically. There is a hierarchy of the urban transition spaces in any urban planning like the City level, Town level, The District level, and the Local level.