Outside the house, check the bottom corners of windows and doors. Check the exposed concrete at the base of the house for cracks. If there are only small cracks, they may also be nonstructural, but they may also be the first indication of trouble to come. Call a professional registered engineer to make an inspection for you. If possible, check the house after or during a rain.
Proper drainage is essential.
Roof leaks when roof material is in good shape. Remember the guideline. A tree should be as far away from the house as its mature height . Check gutters and downspouts. Ask to see the soil report upon which the foundation was designed.