I've seen some 2020+ construction in the Texas market that might not make it much beyond 2040. If you want to see stuff that lasts, constrain year of construction to the 20th century on Zillow.

I know of entire subdivisions where the new homes are being actively consumed by black mold due to insufficient HVAC capacity for latent heat removal. Every single central dehumidifier installed in those builds has lost its refrigerant charge due to some common manufacturer (Honeywell) defect. So, in some cases we didn't HVAC hard enough despite being America.

I don't understand how you can maintain a civilization in a place like Miami or Galveston without modern hvac.

I believe Japan does it, for instance.

https://en.wikipedia.org/wiki/Housing_in_Japan

"An unusual feature of Japanese housing is that houses are presumed to have a limited lifespan, and are often torn down and rebuilt after a few decades,..."