In 1933, Iceland‘s parliament passed an act granting the City of Reykjavík an exclusive permit to harness the river Sog.
The Sog Station was established as an independent company owned by the city and phase one of the Ljósifoss Station development project was tendered out in 1934. Work began in 1935 and the first part was completed in 1937. The Icelandic state became co-owner of the Sog Stations in 1949 until 1966, when they were incorporated into Landsvirkjun as part of the owners‘ founding contribution.
A thorough upgrading of the original structures and equipment at the Sog Stations, which were showing signs of age and wear, was completed in 1999. This involved repairs and strengthening of concreted buildings, including earthquake precautions, along with improvements to machinery and upgrading of electrical, protective and control equipment. After these upgrades, the Sog Stations are expected to remain fully operation for several decades to come.