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.

Housing for the poor in Thailand in a period of a decade, Baan Mankong Programme (BMP) has been largely focused. This paper focuses on an architectural engineering point of view to explore the housing phenomena with its conversion as well as the usage of extension materials. Extension materials are clarified and made categorizations to unveil the trends of practical urban poor housing case, Bang Bua community in Bangkok, Thailand. Two types of extension were apparent which roof and wall extensions are. The imperative factors to be determined for the extension materials consist of easiness of affordability, easiness of installation, materials cost, durability of usage as well as social situation; safety for instance.

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Within a period of a decade, Baan Mankong Programme (BMP) has been a critical topic of discourse as for urban poor housing scenario in Thailand. This paper unveils the contribution of Income Generation Space (IGS) on the BMP, tools to get IGS, clarifies the categorization of IGS in the BMP as well as pinpoints the imperative factors which help for the IGS enhancement strategy. IGS houses are clarified and made categorizations to unveil the contribution of IGS and trends of spatial utilization of a practical urban poor housing case, Tawanmai community in Khon Kaen, Thailand. The imperative factors for IGS enhancement strategy consist of chronological change, dwellers keenness, dwellers occupation, gender implication, household maneuver system, dwellers education level, as well as transportation issue.