Key legal question
Whether Article 8 ZGB was violated in relation to proof of the owner's own work and the contractual cost basis.
Extracted holding
No. The cantonal court made binding factual findings and evaluated the evidence; the burden-of-proof rule was therefore irrelevant.
Extracted reasoning
Article 8 ZGB governs burden of proof and the right to present evidence, but not free evidence assessment. The appellant's arguments conflicted with binding findings that the agreed own-work items were performed.