The current building assessment tools are limited to building performance analysis with respect to box models derived from the urban morphology of developed countries. Complex socio-technical issues associated with rapidly urbanizing cities like Mumbai are often missed. Here, we forward a conceptual framework for designing slum habitation adheres to norms of energy, health and environmental sustainability. This can enable in designing slum rehabilitation projects such that they are not only energy efficient, but are also acceptable to the occupants. This conceptual framework attempts to bridge the missing link currently existing in the early design stages of slum rehabilitation projects. The proof of the concept is a work currently in progress, hence, here, we only elaborate on the conceptual framework exemplified through three cases of slum rehabilitation houses in Mumbai.