Retaining Wall Construction Causing Soil Slippage Liability

A property owner sued a neighboring landowner, alleging that the construction of a retaining wall on the boundary line caused soil slippage onto the lower property, constituting a fault under civil liability rules. The appellate court upheld the trial court's finding that the retaining wall, built without administrative authorization and causing material damage to the neighboring property due to soil instability, constituted a fault imposing liability for the resulting damages. The highest court rejected the appeal, affirming that the unauthorized construction causing damage to the adjacent property through structural instability demonstrates the requisite fault for civil liability.