[vasco]

The safety standards are the rating. Someone can build a house for "better than code" and they can advertise that too, but a "rating" here would be the standard that for example a building with X floors needs to follow to ensure it's earthquake resistant, can bear at least Y amoung of weigth, resist to Z winds, etc. The mix of all these things are what become the building standards or "code".

Otherwise to do ratings like you suggest you can only do it to mass produced things, in this case the closest would be mobile homes or prefabs, since you can actually destroy it and see how difficult it was and give it a rating.