Data Source: Realtor.com, Housing Inventory: Median Listing Price per Square Feet in Rensselaer County, NY [MEDLISPRIPERSQUFEE36083], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/MEDLISPRIPERSQUFEE36083, June 26, 2022.
I was playing around with the NYS GIS / Tax Map Feature Service, and realized it was pretty easy to query any building that was built in the state prior to 1820. The trick is keep the query narrow enough so you don't request too many points -- the feature server is limited to something like 1,000 points per request, although your browser will crash before then.
I was a bit surprised to see that there isn't a stronger correlation between population density and the percent of the population that rents. But maybe it's because often Census Tracts contains things besides residential properties like roads, parks, and businesses.