Subsurface conditions and property rights impact construction

Geotechnical investigations and the legal extent of land ownership are critical factors in construction and property management. In Switzerland, early subsurface examinations are essential for determining foundation requirements, excavation needs, and potential costs. These investigations identify layers such as loose rock, silt, clay, or groundwater, providing engineers with the necessary data to prevent issues like uneven settlement. The SIA 267 standard provides the regulatory framework for these geotechnical assessments.

In Germany, property rights extend both above and below the surface. While the Civil Code (BGB) theoretically suggests ownership extends to the center of the Earth, owners cannot prohibit activities at depths that do not interfere with their use of the land. This legal nuance allows for public infrastructure projects, such as subway expansions or tunnels, to proceed beneath private property if they do not restrict the owner's surface utility.