US houses can easily last 100+ years. Once they're enclosed, basic maintenance and rare exterior repair/replace gets you a century, unless a natural disaster hits or a freak accident (major fire). With metal roofing becoming common, that removes having to replace the roof except every ~40 years.

You can find plenty of poorly constructed 100+ year old homes in the US, with original innards put together every which way in a shoddy fashion before there were building codes and standardization of construction. And yet there they are, still going with basic maintenance.