Embodiments of the present invention address deficiencies of the art in respect to assembling an application using a component based model and provide a method, system and computer program product for re-wiring component based assemblies in a component based computing environment. In one embodiment, a data processing system for re-wiring component assemblies of component based user applications can include a component aggregation application configured to aggregate multiple components in an aggregation, a property broker coupled to the component aggregation application and configured to establish wires between selected ones of the components in the aggregation; and, re-wiring logic. The re-wiring logic can include program code enabled to re-wire selected ones of the components in the aggregation.