Question juridique clé
Whether the June 28, 1996 agreement on the retaining wall and embankment was concluded by mutual consent
Solution extraite
Yes. The cantonal court’s finding of an actual agreement was binding; the appellants' lack-of-consent argument failed.
Motifs extraits
The lower court found, based on witness testimony and the confirmation letter, that the parties had agreed on the wall height and embankment design. That was a factual finding, not a question of law reviewable on appeal.