"This is, without comparison, the biggest deal in VSK Football's history," says the club's sporting director Billy Magnusson in a statement on the club's website.
The transfer takes effect on August 30, but it is already clear that the Dane will not play any more matches for Västerås.
It is not clear which club Västerås sold its goalscorer to. However, Västerås says that the Danish club Sønderjyske is entitled to part of the transfer fee.
Ladefoged joined Västerås from the Danish club a year and a half ago. He scored ten goals in the Superliga last year and has scored nine goals for Västerås in the Allsvenskan this year.
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