This study is intended to analyze and describe the relationship between the quality of spirituality and the quality of sustainability through the study of residential community developments in the real estate sector. Based on integral theories, this study explores three communities globally and three communities in Thailand. According to the data, gained mainly from in-depth interviews, questionnaires and observation, the findings show that an integral transformation towards a higher degree of sustainability has occurred, which embraces a spiritual, behavioral, cultural, social and environmental dimension. The findings also show that spiritual transformation has been the primary factor enabling this occurrence. Accordingly, this study offers suggestions for facilitating a transformation towards integral sustainability.