The historical landscape reveals diverse social, economic, political transformations that create an identity of place, one which should be protected for future generations. Manor and park estates have been and continue to be valuable parts of cultural heritage and a distinguishing feature of the rural landscape in Europe. Since 1945, however, they have often failed to resist negative changes, especially in Eastern Europe where, after the Second World War, countries adopted the socialist system, which abolished private property and placed many historical buildings under the management of state institutions for several decades. In this context, it is important to study their current state of preservation. This study analyzes the condition of manor and park estates in Western Pomerania, Poland, that became the property of State Agricultural Farms (PGRs) after the Second World War. For this purpose, it was necessary to determine the extent of their transformation brought about by the State Agricultural Farms from 1949–1991, as well as changes that have occurred in the past 30 years. A qualitative method was used to assess the preservation of historical manor and park estates and to classify them according to their degree of preservation. The results showed that 42% of the estates surveyed have had their original form and spatial composition transformed, and their preservation status is assessed as moderate. Nearly 30% are in poor condition, which is hindering their full revitalization and the restoration of cultural and natural values. Only 28% of manor and park estates are maintained in a very good state. It is a matter of concern that the decline of these estates has been continuous and that restoration efforts have been limited. However, by assessing the current state of preservation, we can identify the measures necessary to stop further deterioration and preserve the cultural heritage of the region. It is clear that the preservation of these estates is essential to maintaining the identity of Western Pomerania. Manor and park estates are historical monuments associated with the people who once lived there. They must be protected to promote sustainable development and preserve a common European cultural heritage for future generations.