Subsidence which affects the whole building to a similar extent may not cause a serious problem. It is the shrinkage of clay subsoils that causes differential subsidence which causes the main problems and results in the need to consider remedial works.
Structural engineer in Canberra ACT:
The above information is for guidance only.
If you need on-site assessment, contact Antoun from ANH Consulting Engineers about your particular problem or for footing design that suits your site condition.