The project aims to advance knowledge about housing design and indoor environment to improve the wellbeing of older people with low socio-economic status in South Australia, including those with culturally and linguistically diverse backgrounds. It will gather information about indoor living environment and relationships with wellbeing of the occupants, household energy use and operational costs, to explore affordable improvement strategies. The project is significant to address the problems faced by one-third of the population who are unable to afford proper housing and fuel-poor. Improved living conditions will lead to better quality of life and reduce public health costs while providing environmental benefits through reduced energy use.