This paper attempts to find ways to understand spatial patterns in incremental process of low-income housing. The case study was held in Lusaka Sites and Services project area, Zambia, where house plans of each surveyed house for every expansion phase were translated into graphs to consider as networks, and reduced graphs were induced by applying the CONCOR method to represent information in a simple form that can illustrate structural equivalence of space. Then, 33 reduced graphs were classified into 9 types and were analyzed by referring to the onsite interviews on arrangements of owner and tenant spaces.
