Question juridique clé
Whether the municipality could rely on its own population forecast rather than the cantonal binding forecast to calculate 15-year zoning needs under Art. 15 RPG.
Solution extraite
The binding cantonal population forecast of 2009–2035 had to be used; the municipality’s alternative forecast did not justify additional zoning.
Motifs extraits
The court held that the cantonal forecast already reflected past municipal development and relevant demographic factors. No unforeseen developments justified departing from it, and the municipality’s calculation would have produced an overdimensioned building zone contrary to planning principles.