Complex sentence: The location of the station is in a currently unbuilt area of Lelylstad, that in 1988 was planned to be built up, but demand for houses was not as big as thought in Lelystad, and the planned neighbourhood Warande was never built.
Split into simpler sentences: The location of the station is in a currently unbuilt area of Lelystad. In 1988, this area was planned to be developed heavily for residential purposes, but demand for houses was not as big as thought in Lelystad and the planned neighbourhood of Warande was never built.