I don't get hired by such as these, ergo to inspect the process might be trespassing.
BUT
Plenty of local subs might fill your ear with what they are asked to do/not-do that can give you food for thought.
If the city/BTU would allow you to visit energy consumption of addresses known to be Builder A or B, then that perspective could be weighed against first-costs.
The #1 cause of lawsuits are foundation failures in this volatile clay supporting soils so maybe some local foundation repair companies might share some opinions, even if contrary to self interest.
Short-hand answers here ... long-hand help here ....
http://pages.suddenlink.net/tgivaughn/