The Governing Body of Suomenlinna manages approximately 330 of the some 350 apartments in Suomenlinna. The apartments managed by the Governing Body are non-subsidised rental apartments owned by the State.
Approximately one third of the apartments are leased by the Defence Administration to its staff as employee housing. The Defence Administration makes the decisions with regard to the selection of tenants for the apartments leased by it and does not lease apartments in its quota to persons that are not members of its staff.
Apartments managed by the Governing Body become available very seldom, only a few apartments each year. Apartments become available on completion of restoration projects or after residents move out. Hardly any new apartments are constructed in Suomenlinna.