In this paper, we describe our work in developing an agent based smart house platform using TAOM4E development methodology and the JADE-platform with the Jadex-extension. In order to remotely monitor its functions we implemented a Jade-Leap mobile application. We developed a central ontology for context representation and the support for behavior changes according to user’s affective feedback. We also emphasize the issues related to ontologies supporting agent communication, sensor integration and affective sensing. Experimental results have showed the proper functioning of this system, whose novelty consists in merging together a multi-agent system, an ontology-based mixed environment representation and reasoning engine, and a rulebased model of the user’s affective feedback. Categories and Subject Descriptors I.2.11 [Distributed Artificial Intelligence]: Multiagent system. General Terms Design, Experimentation, Human Factors, Languages. Keywords Smart House, Multi Agent Systems,...