Sustainability requires the engagement of every single constituent of the "building" product supply chain, from concept design to operation. The research explores ways of creating circles of impacts that bind building professionals, energy administrations, and citizens in a shared low carbon experience through a "one-stop-shop" Sustainable Construction Service Platform. The paper discusses awareness raising, stakeholders' engagement, technical requirements, and adoption and diffusion factors related to the platform. The research identifies the need to use advanced knowledge management functionality to leverage the value dimension of the proposed "one-stop-shop" service platform initiative.