Questão jurídica principal
Whether the cantonal court arbitrarily found that the parties did not reduce the lump-sum contract price from CHF 400,000 to CHF 330,000.
Decisão extraída
The cantonal court’s assessment of the evidence was not arbitrary; the contract addendum only changed payment terms, other evidence supported the unchanged lump-sum price, and the result was not untenable.
Fundamentação extraída
The witness statement had to be read in context; the addendum did not amend the price clause; the construction estimate corresponded to about CHF 400,000; later project changes made the appellant’s version implausible.