The title of the present treatise refers to a preservation paradigm in housing, which is surveyed from different perspectives. The existence of a paradigm is confirmed when a prohibition or major disadvantage for house demolitions and reconstruction as well as a preservation duty is observed. Legal regulations, common practice and history seem to indicate a paradigm of preservation in housing. At the same time, attempts and intentions trying to enable reconstruction can be identified. Besides the question regarding the actual existence of such a paradigm, the present thesis explores further alternatives, in particular reconstruction as a development tool. The exploratory focus implicates the reasonableness of a paradigm shift and the possibilities of implementing reconstruction as a development tool. In fact, external effects and social benefits are the main assessment criterions of reconstruction in this master thesis. The chapters "Ausgangslage und Rahmenbedingungen" and "Österreichischer Gebäudebestand" examine the settings, objectives and trends in Austrian housing situation. Furthermore, the current approaches to the building stock development are illustrated in chapter "Praxisszenarien". A potential for reconstruction in some sub-segments can be determined mainly because of a low rate of modernisation, a strong shift and inefficient investments. The historical development shows the minor importance of stock development until the mid-19th century and the evolutionary steps from "Assanierung" as extensive demolition to "sanfte Stadterneuerung" with the main focus on preservation. The contemporary situation is mainly affected by these development steps. Numerous obstacles and possibilities for reconstruction are shown in "rechtliche Grundlagen des Erhaltungsparadigmas" where legal regulations on preservation, acquiescence and termination are described. The owner's decision is mainly influenced by financial, constructional and personal factors. Due to external effects and market failure in stock development, there is a need for governmental interventions. External effects can only be determined at the property level. Consequently, governmental interventions need to be formulated at this level or in "development areas". The existing instruments should be adapted to reconstruction and new possibilities of intervention and administrative discretion should be invented. The chapter "internationale Ersatzneubaumodelle" describes the international discussion on reconstruction and the different implementation paths. Reasons for or against reconstruction from an overall social point of view and assessment criterions at the property level are stated in the synthesis. On the basis of the findings there is a potential of reconstruction in Austria, which needs to be evaluated on the basis of social, economical, ecological and planning aims at the property level. This strategy requires a legal framework for reconstruction. Therefore, the equalization and elimination of obstacles should be implemented in housing law, planning law, promotion law, fiscal law and building regulations law. Hence, in order to avoid undesirable developments, the precondition of a development process based on plans or supported by planning measures should be put in place.