Question juridique clé
Whether the construction works had started before the permit expired under Art. 118 al. 1 LATC.
Solution extraite
The cantonal court could, without arbitrariness, find that the works had not started and that the applicants had not proven a serious, immediate intent to begin construction.
Motifs extraits
No concrete works had begun by the expiry date; preparatory steps, plans, offers, and expenses were insufficient. The court could demand probative documents such as signed gross-work contracts and evidence of financing.