The Level 3 Home Survey used to be called a Full Structural Survey or Building Survey. The focus of the service is to provide a thorough review of any current or potential defects and are non-intrusive (this means that a surveyor won't be pulling up floorboards or drilling holes in walls unless they get prior written consent from the seller allowing them to do so and agreeing to make good any damage). We run through in detail below what a RICS Building Survey covers. It is the highest visual assessment a RICS surveyor can provide. A structural survey is not provided by a RICS surveyor, but a Structural Engineer and is for either general or specific assessments in a property. The inspection normally relates to: Subsidence Removal of a load bearing wall Removal of a chimney breast