Kernrechtsfrage
Whether the state of facts could be challenged as arbitrary regarding the extent to which renovation works benefited the leased premises.
Extrahierter Entscheid
The factual findings were not arbitrary; the tenant did not show that the works mainly benefited the neighbouring arcade, and the evidence supported that they concerned the whole building.
Extrahierte Begründung
The Federal Tribunal held that it is bound by the facts unless they are manifestly inaccurate. The tenant did not identify ignored evidence, so the cantonal appreciation of evidence stood.