In Portugal, the sustainability of construction has been looked into over the past few years, especially where quality, safety and natural/energetic resource-saving technologies are concerned. Deconstructing a building is the careful dismantling of that building so as to make possible the recovery of construction materials and components, promoting reuse and recycling. The concept arose as a consequence of the rapid increase in the number of demolished buildings and the evolution of environmental concerns within society at large. Deconstruction paves the way for the revaluation and reuse of construction elements and materials. A critically discussion by deconstruction importance is done using previous studies and data collected from present experiences. This aim is to present the main advantages of deconstruction technique to refurbishment, as well as the guidelines to design process aiming to guarantee a successful management deconstruction process, thereby contributing towards the economic sustainability of said process. The research projects which authors are involved are also discussed.