From a Zillow.com online article:
Currently, 33.9 percent of owner-occupied U.S. homes are owned by residents aged 60 or older, and 55.2 percent by residents aged 50 or older. As these households age and begin vacating housing, that could represent upwards of 20 million homes hitting the market through the mid-2030s.
The massive Baby Boomer generation has already begun aging into retirement, and will begin passing away in large numbers in coming decades – releasing a flood of currently owner-occupied homes that could hit the market. That could help end the last few years’ inventory drought, as well as a more fundamental shortage of homes in certain places.
This Silver Tsunami of homes coming to market could be a good substitute for new home construction, which has been in short supply for the past decade in large part because of difficult-to-overcome challenges faced by builders.