I bought my first home 6 months ago. I noticed an obvious "tilt" when I had the house inspected. I had an ASHI certified home inspector who stated that "the house is 80 years old, of course it leans a little bit". I recently went into both of my neighbors'home and neither has such an obvious "tilt" so now I'm worried that there is a problem afterall. There are no cracks in the walls, and all of the doors open/close normally and the house leans towards the NW corner. My questions are:

1. Should I be concerned?

2. If so what could be the possible problems?

3. Who would be the best person(s) to call to diagnose the problem--another home inspector? structural engineer? foundation specialist?

Thanks