Structural damage is often caused by subsidence, which can lead to damage to your foundations. In this situation, repairing the structural damage will entail foundation repairs initially.
Shown below are some photos of different sections of the structural repairs and conversion we completed of a void space beneath the floor of a property in Sheffield, South Yorkshire. In each case, the photo on the left shows the 'before' picture, the one on the right shows the 'after' picture, when building work was complete, and the basement almost ready for preparation for flooring, etc: -