Our nation relies upon the private sector to provide most of our new housing.  A little over 1 million new homes are created annually according to the US Census Bureau.  
 

The Federal government, via the Internal Revenue Service, as administered by the Housing & Urban Development Department’s “LIHTC” program is the primary tool for the small amount of housing production investment by the public sector (usually less than 10% of the total production,) but even this is delivered by private sector action.  
 

The State of Oregon has one major metro area of ~ 2.5m persons, about half of the State’s population.  Within this area, there are just under 1m households and just over 1m homes according to the US Census Bureau.
 

The State of Oregon has been producing less and less housing; the State’s Office of Economic Analysis reports it is the lowest per-capita production (how many new homes relative to how many households exist) since World War II.
 

As household preferences have shifted towards urban locations, the City of Portland has increasingly produced the majority of the new housing.