The first part of the study is to apply the Markov technique to analyze the residential mobility patterns only in a case study of four types of low-cost housing. Those are row house/townhouse, condominium, up-graded slum housing and housing in non-graded slum. All residences are located in the districts of Bangkhen-Don Muang, Bang Kapi, Phra Khanong and Nonthaburi. The total sample is 1,400 households, and the informants may be chiefs of households or spouses. The residential mobility patterns here are those which occur on average 10 years per time.