These data provide housing starts vs household formation by decade (annual averages)
1950s 1.38 million houses stared and 0.92 million new households per year
1960s 1.51 and 1.06
1970s 1.71 and 1.60
1980s 1.49 and 0.98
1990s 1.31 and 1.04
2000s 1.62 and 1.08
2010s 1.05 and 0.98
Housing starts exceed household formation every decade. For a couple reasons. First, as some of you noted some people have multiple homes, including vacation homes. Second, there is some depletion of the housing stock due to houses getting old and unhabitable or being destroyed. So the net addition to the housing stock is smaller than housing starts.
It is worth look at the difference between starts and household formation by decade.
1950s 0.46 million
1960s 0.45 million
1970s 0.11 million
1980s 0.51 million
1990s 0.27 million
2000s 0.54 million
2010s 0.07 million
These are national data. They don't tell us anything about individual states. But they do show that the 2010s stand out as a decade when building activity (housing starts) was unusually low relative to household formation.