Comment Re:Average lifetime of american houses? (Score 1) 300
As far as my outsider's knowledge goes, many Americans choose to build 'cheap and lightly' with resulting lifetimes of less than 20 years.
Your "outsider's knowledge" is wrong, unsurprisingly.
See the-age-of-the-housing-stock-by-state to get some real information. And, if you read the article, you'll see that the states with lower median housing age are those with higher growth (i.e. building a lot of new homes because the population is growing in those areas - not because they're replacing existing homes).
The only places I've seen homes/apartments actually being ripped down and replaced is where the location is more valuable then the existing building and the replacement is larger - this is mainly done in wealthy suburbs where smaller houses are being replaced with much larger ones (and then the small homes were usually built in the 1950's or 60's).