The present application provides a method for renovation works on a building that has a plurality of building elements, for example walls. The method includes: receiving scan data of a building element of the building; (150) processing the scan data to determine at least one dimension of the building element and an initial property of the building element from the scan data; configuring (160) a building system for the building element to achieve a target property of the building element, the building system being configured according to the at least one dimension of the building element and according to the initial property of the building element; and generating instruction data (170) for fabricating the building system. There is also provided an apparatus for renovation works on a building that has a plurality of building elements, for example walls.