Launched in August 2005 as a joint venture between Fitjar Kraftlag and Dong, the 90MW project, near the city of Bergen, received approval in 2007 despite local protests about the impact of the 35-40 turbine wind farm.
Dong told Windpower Monthly it wanted to concentrate on a significant portfolio of wind projects in a number of northern European markets, including offshore in Denmark, Germany and the UK, and onshore in Poland.
Earlier this year, Dong said it believed that the UK offshore wind market would eventually form a larger part of its wind-energy portfolio than that in its native Scandinavia.
In a statement, Dong spokesman Andreas Krog said: "The Midtfjellet project continues with a future potential as an attractive project and the company is actively seeking a buyer who, together with Fitjar Kraftlag, can realise phase 1 of the project within the framework of the construction grants awarded".
Krog said that the project, as yet unbuilt, would be an attractive proposition for the buyer of its 50% stake.