I used to train pilots for a living. Just eyeballing it from the photos but that looks like 1000' AGL to me. Plus, that building is in San Jose's airspace, whic

I used to train pilots for a living. Just eyeballing it from the photos but that looks like 1000' AGL to me. Plus, that building is in San Jose's airspace, which means that aircraft was in contact with and radar-identified by San Jose ATC; the FAA therefore has a radar tape for that aircraft including altitude squawks. So unless that pilot is a complete idiot, there's no way in hell they busted 91.119.