1. A computer-implemented method of generating building instructions for a building element model, the model including a plurality of building elements, the building instructions being indicative of a sequential order of construction steps for constructing the building element model, each construction step including adding at least one building element to the building element model; the method comprising: determining, from a digital representation of the building element model, at least one sequence of deconstruction steps for at least partially deconstructing the building element model into building elements, each deconstruction step including removing at least one building element from the building element model; determining at least one construction step of the sequential order of construction steps based on the at least one plurality of deconstruction steps.