When e-participation is considered in the context of applied research, researchers support government institutions by enabling technology for citizens who participate in policy-making. Governments' e-participation agendas involve a variety of different design activities; for example, designing new administrative procedures, computer literacy programs, or creating new laws. Design science aids the creation and evaluation of artefacts that are intended to find solutions to identified problems in a rigorous way. We therefore characterise three different types of e-participation design activities: conceptualisation, development, and dissemination, and show how design science principles are used to improve rigour and relevance in this kind of research.