Sorry, yes most houses are built from cookie-cutter plans. I guess I meant from scratch in that they're mostly built up with wood framing (simple to do), vs a lot of prefab which may require welding and more specialized skills to assemble the panels (harder to do, or at the very least less conventional).
In the US yes. In Europe most new houses use a concrete inner structure with a brick facade if they're family sized houses.
That makes them particularly well suited for prefab, a whole wall segment can be constructed including isolation, ducts, windows / doors etc and hoisted in to place by a crane in one movement. Because the brick is laid in the mould a bricklayer can work on a gantry under a roof instead of in the open air which means year round bricklaying instead of only when it's not freezing or raining (you can't lay brick in pouring rain).
Because the wall segments are made on a guaranteed flat surface a section is always going to be perfectly straight without any measurement at all.
Note that these are full bricks, not the typical 'slices' of brick used to give US houses a brick-like appearance over a wooden interior ('brick siding').
Ah that's great. I'm definitely slanted because of my experience in California, where earthquake regulations basically mean no masonry construction ever, and very rarely anything other than wood framing for residential houses.