Question juridique clé
Whether Helvetia Nostra had standing to appeal against the building permit.
Solution extraite
Standing had to be recognized in light of the Federal Supreme Court's principle case law on art. 12 LPN and art. 75b Cst.
Motifs extraits
The project concerned a task of the Confederation under art. 78 Cst. and 2 LPN because the permit involved a residence potentially subject to the federal secondary-residence cap.