This paper tackles on ethical issues that are relevant when designing new technological service systems for the assisted living. In this paper we present our preliminary ethical guidelines that are built on six ethical principles that are selected based on the ethical assessment of MINAmI (Micro-Nano integrated platform for transverse Ambient Intelligence applications), FP 6 Eu – project, scenarios. The aim of ethical assessment is to conclude concrete and clear ethical guidelines that could be used as check lists in MINAmI platform design, demonstrator design and further in general in designing applications onto the MINAmI platform. We assume that this kind of checklist is also useful for other Ambient Assisted Living type of developmental work.