It sounds like the stilts are supported on caissons or engineered piers. You’d definitely want a soils test. Certain areas have a lot of “stilt” houses and soil that tends to liquify… the side of Mt. Soledad, above I-5 has always made me nervous.
Depending on when it was built, you may be able to get the original records/plans/inspections. I was surprised we were able to get the soils report for our street (homes built in 1964). It was all there at the city offices.
