Crowdsourcing is a new concept for breaking with the traditional hierarchical model of collaborative design. Crowdsourcing is based on web-based contributions of individuals in a decentralized digital environment that supports the sharing of opinions and creative ideas. This article develops the concepts and issues associated with the possibility of crowdsourcing design as well as discussing its relationship to prior developments of media environments for collaborative design. Three scenarios for crowdsourcing in architectural design are developed as a basis for considering the requirements for the design and function of crowdsourcing media environments in architectural design.