This paper clarifies the metamorphosis process of dwelling units throughout dwellers' occupation and extension in low-cost housing projects provided by the National Housing Authority (NHA) at Banpet District, Khon Kaen Province, Thailand. It has shed light on an apparent outlook on a survival strategy made by dwellers through their occupation time. Tenures showed their maneuver of space extension which could sustain low-income life activities. Apart from acting as a living habitation, the incremental self-help extended area itself could help residents generating their income within their houses, called the Income Generation Space (IGS). About 77% of houses in the research area conducted the extension. About half of dwelling units in the study area are extended for IGS. Moreover, the spatial characteristics of IGS as a multipurpose space can serve the desire of dwellers. Furthermore, it has a capability of solving the poverty issue as an essential possibility that is needed to be implemented in the near future low-income habitation strategy. IGS has supported the dwellers' continuous occupation and could also reflect the nature of how low-income Thai people have survived through basic given living conditions.