The aim of this study is to explore heritage processes within contemporary urban planning in Sweden, which is done through a single-case study. The point of departure for the study is the management of Havrekvarnen, an early modernist industrial building within an urban development area of Nacka, Sweden. Through parallel decisions by the County Administrative Board and the local Municipality in 2016, the building was firstly, listed with the strongest legal, cultural, and historical protection available, and secondly, the municipal urban regulations were changed so that the landowner was given permission to pursuit a reconstruction of the building, replicating its original appearance. As such the case constitutes a hitherto unique example of a listed future reconstruction in Sweden.

The study examines how the process took place, focusing on actors and critical junctures involved in the execution and how the description of the building's heritage-values changed. The study uses a composite theoretical framework of authorized heritage discourse and actor network theory. To this an explaining-outcome process tracing is applied as method. Through a sequential process of collecting empirical data, in the form of archival records and interviews, the process was mapped through the conceptualization of a causal mechanism. The method had not previously been used in the field of art history and was chosen as such with a tentative approach. The study gives an extensive presentation of the legal and practical framework surrounding heritage processes within urban planning in Sweden, as well as puts the study within a local historical context.

The results of the study show that within the observed case, a trade-off situation between authenticity and aesthetic historical values arose, caused by the poor technical condition of the building: the aesthetic values were deemed to take precedence in the assessment. The study also shows how antiquarian consultants have had a decisive influence on the process of legislative enabling of the reconstruction of Havrekvarnen. The research design’s use of process tracing to map heritage processes is thus deemed useful for future enquiries within the field of art history and heritage studies.