A really costly trend we see now days is bidding off the first set of plans, while the plans are still in plan check. We had one guy pick up his plans and then called for rough electrical the next day. I asked him where his three insta hot circuits were, one being 60 amps, I also told him that he would have to remove the panel that he had in the rated wall, that was not identified on the original plan check and several other things.
He wanted to argue that those things weren't on his plans and I conceded that he was probably right, but they were on the approved plans.
Had one guy install ever receptacle box to low for ADA, that's a costly mistake. Now should he have known how high to install them, probably, but the plans called for 12" to the center, before I had it corrected.