A healthy building environment, when looking from a gerontechnology perspective, should facilitate ageing adults' functioning, self-esteem, and prosperity. Creating healthy environments is becoming more and more relevant in society. Older adults tend to stay more indoors when compared to younger populations; ageing adults need to work longer than before since the retirement age is increasing. In order to create healthy building environments both outdoor and indoor, environmental aspects need to be considered. Steps towards creating healthy building environments demand further research on the association between indoor environmental factors and ageing adults, how the indoor environment affects older people's health due to pathological ageing, and how the indoor environment affects older people's well-being.