The aim of this paper is to analyse the ethical issues relating to privacy that arise in smart homes designed for people with dementia and for people with intellectual disabilities. We outline five different conceptual perspectives on privacy and detail the ways in which smart home technologies may violate residents’ privacy. We specify these privacy threats in a number of areas and under a variety of conceptions of privacy. Furthermore, we illustrate that informed consent may not provide a solution to (...) this problem. We offer a number of recommendations that designers of smart homes for people with dementia and people with intellectual disabilities might follow to ensure the privacy of potential residents. (shrink)