The Koivusaari metro station opened on Saturday 18 November 2017, when metro traffic on the Ruoholahti–Matinkylä section started up.  The metro station construction contract was implemented by  SRV Rakennus Oy.

The station’s main themes are sea and water.  The ceiling of the main entrance is reminiscent of an upturned wooden vessel. In line with the marine theme, the area between the yard and building includes beach pebbles and grass, and the upper walls of the platforms repeat the shape of a whale’s baleen. The station was designed by Helin & Co Architects.


The Koivusaari metro station is one of Länsimetro’s two metro stations in Helsinki. The Koivusaari metro station is situated under water, between Lauttasaari and Koivusaari, on the south side of the Länsiväylä highway, at the address Sotkatie 11.

The entrance on the Lauttasaari side is in use. The entrance on the Koivusaari side is completed and waiting for the surrounding area to be developed.

Koivusaari is presumably the world’s only metro station located under the sea. At 76.1 metres in total length, the escalator from the platform area to the ticket hall is the second longest in Finland.

The station and entrances are wheelchair-accessible.

HSL’s web page

HSL is responsible for planning and acquiring public transport for its operating area. On HSL’s web page you can find more information about the new metro section, the locations of entrances and bus stops, park and ride spaces and the feeder network route.

Koivusaari as an area in Helsinki

Koivusaari is being developed into a neighbourhood of approximately 5,000 residents and over 4,000 jobs. The area combines a seaside environment, archipelago landscape and efficient public transport. All planned apartment buildings are located within 600 metres of the metro station. The metro takes commuters to Helsinki’s city centre, Tapiola, the Otaniemi campus or the Keilaniemi business area in a matter of minutes.

Koivusaaren metroaseman Lauttasaaren puoleinen sisäänkäyntirakennus.

The Koivusaari metro station.

The Koivusaari metro station.

Koivusaari, asemalaituri

Koivusaaren metroaseman asemalaituri

Koivusaari, liukuportaat

Koivusaaren metroaseman liukuportaat

Koivusaaren asema ulkoa

Koivusaaren metroasema ulkoa

Koivusaari, liukuportaat

Koivusaaren metroaseman liukuportaat