It’s probably more to do with the age of the buildings. Generally you don’t need to update the safety level to today’s standars unless you do some major changes

It’s probably more to do with the age of the buildings. Generally you don’t need to update the safety level to today’s standars unless you do some major changes. It may or may not be the case that US houses catch fire more often, but fire is always a very big deal if it does happen and then you really don’t want to be locked inside the ‘fire-proof’ house.