[patrick451]

This happens literally every single day in residential construction. Aside from the building code, there isn't typically a "spec" for construction. The plan doesn't specify "this wall shall be plumb to within +/- 0.001 radians". Somehow, cabinets still get hung even though the framer framed a crooked wall on top of a crooked stem wall all because foundation guy was hungover that day.

[freetinker]

That’s because average residential construction has some tolerance for error (and is therefore poor quality imo).

Sure - perhaps not plumb to within +/- 0.001 radians, but there’s still an expectation that the wall needs to be vertical within some error tolerance band (even if not specified). Error correction happens real-time - the cabinet guy compensates for the wall error, and so on.

That’s also why I find residential construction so shoddy (the US at least) - electrical junction boxes are always a little off-angle, cover plates aren’t flush, etc.