Koitsanlahti Manor is under the management of the Finnish National Board of Antiquities and Historical Monuments. At the moment the museum is closed, so it is only possible to see the buildings and grounds from the outside. Koitsanlahti Manor is Finland’s only "granted manor", and as such, has a cultural heritage and history which are unique in the area which is now modern Finland. The Manor traces the history of the period when Sweden was a Great Power as well as the history of the "granted lands", and the situation of Finnish peasantry from the 17th to the 19th century.

In the yard of the manor there is a memorial to honor the past generations. The memorial is called "Rocks of suffering" and it has been built in 1958.