Fascinating work, Joseph.
I think the analysis might benefit if you switched to energy use per capita. This will remove the effects of population growth from your analysis (since it is irrelevant to the home ownership rate). I took the liberty of making this switch and expanding the time period. Here is the result:
The correlation is not quite as high as yours (R-squared is 0.76), but the relation is a bit easier to interpret.
Home Ownership Data:
1965 - present: https://fred.stlouisfed.org/series/RHORUSQ156N#0
1990 - 1960: Historical Statistics of the United States, Table Dc761
1949-2012: Energy Information Agency Table 1.3
1890-1945: Historical Statistics of the United States, Tables Db155-163