Sustainable smart houses are one of the methods through which all these factors can be touched upon because such houses provide social well-being and cause less damage to the environment. Therefore, this study analysed the predictors of purchase behaviour of sustainable smart houses and their impact on community happiness. Among the predictors which are part of this study include attitude, subjective norms, perceived behavioural control, cost, intention, and social media networks. Data were collected through a questionnaire survey from 187 Malaysian respondents, and SmartPLS was used for data analysis. Results revealed that purchase of sustainable smart houses does have an impact on community happiness. It establishes the extent to which community well-being has been prioritised by local property developers. In addition, it suggests strategies to help these developers to materialise the goals of smart and sustainable property development focusing on community well-being.